/*
Copyright (c) 2009, UAB "Internovitas". All rights reserved.
Parts of this code use the following licensed software:
  - Yahoo! User Interface Library (http://developer.yahoo.net/yui)
*/
/*
Copyright (c) 2008, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.6.0
*/
/**
 * The YAHOO object is the single global object used by YUI Library.  It
 * contains utility function for setting up namespaces, inheritance, and
 * logging.  YAHOO.util, YAHOO.widget, and YAHOO.example are namespaces
 * created automatically for and used by the library.
 * @module yahoo
 * @title  YAHOO Global
 */

/**
 * YAHOO_config is not included as part of the library.  Instead it is an 
 * object that can be defined by the implementer immediately before 
 * including the YUI library.  The properties included in this object
 * will be used to configure global properties needed as soon as the 
 * library begins to load.
 * @class YAHOO_config
 * @static
 */

/**
 * A reference to a function that will be executed every time a YAHOO module
 * is loaded.  As parameter, this function will receive the version
 * information for the module. See <a href="YAHOO.env.html#getVersion">
 * YAHOO.env.getVersion</a> for the description of the version data structure.
 * @property listener
 * @type Function
 * @static
 * @default undefined
 */

/**
 * Set to true if the library will be dynamically loaded after window.onload.
 * Defaults to false 
 * @property injecting
 * @type boolean
 * @static
 * @default undefined
 */

/**
 * Instructs the yuiloader component to dynamically load yui components and
 * their dependencies.  See the yuiloader documentation for more information
 * about dynamic loading
 * @property load
 * @static
 * @default undefined
 * @see yuiloader
 */

/**
 * Forces the use of the supplied locale where applicable in the library
 * @property locale
 * @type string
 * @static
 * @default undefined
 */

if (typeof YAHOO == "undefined" || !YAHOO) {
    /**
     * The YAHOO global namespace object.  If YAHOO is already defined, the
     * existing YAHOO object will not be overwritten so that defined
     * namespaces are preserved.
     * @class YAHOO
     * @static
     */
    var YAHOO = {};
}

/**
 * Returns the namespace specified and creates it if it doesn't exist
 * <pre>
 * YAHOO.namespace("property.package");
 * YAHOO.namespace("YAHOO.property.package");
 * </pre>
 * Either of the above would create YAHOO.property, then
 * YAHOO.property.package
 *
 * Be careful when naming packages. Reserved words may work in some browsers
 * and not others. For instance, the following will fail in Safari:
 * <pre>
 * YAHOO.namespace("really.long.nested.namespace");
 * </pre>
 * This fails because "long" is a future reserved word in ECMAScript
 *
 * @method namespace
 * @static
 * @param  {String*} arguments 1-n namespaces to create 
 * @return {Object}  A reference to the last namespace object created
 */
YAHOO.namespace = function() {
    var a=arguments, o=null, i, j, d;
    for (i=0; i<a.length; i=i+1) {
        d=a[i].split(".");
        o=YAHOO;

        // YAHOO is implied, so it is ignored if it is included
        for (j=(d[0] == "YAHOO") ? 1 : 0; j<d.length; j=j+1) {
            o[d[j]]=o[d[j]] || {};
            o=o[d[j]];
        }
    }

    return o;
};

/**
 * Uses YAHOO.widget.Logger to output a log message, if the widget is
 * available.
 *
 * @method log
 * @static
 * @param  {String}  msg  The message to log.
 * @param  {String}  cat  The log category for the message.  Default
 *                        categories are "info", "warn", "error", time".
 *                        Custom categories can be used as well. (opt)
 * @param  {String}  src  The source of the the message (opt)
 * @return {Boolean}      True if the log operation was successful.
 */
YAHOO.log = function(msg, cat, src) {
    var l=YAHOO.widget.Logger;
    if(l && l.log) {
        return l.log(msg, cat, src);
    } else {
        return false;
    }
};

/**
 * Registers a module with the YAHOO object
 * @method register
 * @static
 * @param {String}   name    the name of the module (event, slider, etc)
 * @param {Function} mainClass a reference to class in the module.  This
 *                             class will be tagged with the version info
 *                             so that it will be possible to identify the
 *                             version that is in use when multiple versions
 *                             have loaded
 * @param {Object}   data      metadata object for the module.  Currently it
 *                             is expected to contain a "version" property
 *                             and a "build" property at minimum.
 */
YAHOO.register = function(name, mainClass, data) {
    var mods = YAHOO.env.modules;
    if (!mods[name]) {
        mods[name] = { versions:[], builds:[] };
    }
    var m=mods[name],v=data.version,b=data.build,ls=YAHOO.env.listeners;
    m.name = name;
    m.version = v;
    m.build = b;
    m.versions.push(v);
    m.builds.push(b);
    m.mainClass = mainClass;
    // fire the module load listeners
    for (var i=0;i<ls.length;i=i+1) {
        ls[i](m);
    }
    // label the main class
    if (mainClass) {
        mainClass.VERSION = v;
        mainClass.BUILD = b;
    } else {
        YAHOO.log("mainClass is undefined for module " + name, "warn");
    }
};

/**
 * YAHOO.env is used to keep track of what is known about the YUI library and
 * the browsing environment
 * @class YAHOO.env
 * @static
 */
YAHOO.env = YAHOO.env || {

    /**
     * Keeps the version info for all YUI modules that have reported themselves
     * @property modules
     * @type Object[]
     */
    modules: [],
    
    /**
     * List of functions that should be executed every time a YUI module
     * reports itself.
     * @property listeners
     * @type Function[]
     */
    listeners: []
};

/**
 * Returns the version data for the specified module:
 *      <dl>
 *      <dt>name:</dt>      <dd>The name of the module</dd>
 *      <dt>version:</dt>   <dd>The version in use</dd>
 *      <dt>build:</dt>     <dd>The build number in use</dd>
 *      <dt>versions:</dt>  <dd>All versions that were registered</dd>
 *      <dt>builds:</dt>    <dd>All builds that were registered.</dd>
 *      <dt>mainClass:</dt> <dd>An object that was was stamped with the
 *                 current version and build. If 
 *                 mainClass.VERSION != version or mainClass.BUILD != build,
 *                 multiple versions of pieces of the library have been
 *                 loaded, potentially causing issues.</dd>
 *       </dl>
 *
 * @method getVersion
 * @static
 * @param {String}  name the name of the module (event, slider, etc)
 * @return {Object} The version info
 */
YAHOO.env.getVersion = function(name) {
    return YAHOO.env.modules[name] || null;
};

/**
 * Do not fork for a browser if it can be avoided.  Use feature detection when
 * you can.  Use the user agent as a last resort.  YAHOO.env.ua stores a version
 * number for the browser engine, 0 otherwise.  This value may or may not map
 * to the version number of the browser using the engine.  The value is 
 * presented as a float so that it can easily be used for boolean evaluation 
 * as well as for looking for a particular range of versions.  Because of this, 
 * some of the granularity of the version info may be lost (e.g., Gecko 1.8.0.9 
 * reports 1.8).
 * @class YAHOO.env.ua
 * @static
 */
YAHOO.env.ua = function() {
    var o={

        /**
         * Internet Explorer version number or 0.  Example: 6
         * @property ie
         * @type float
         */
        ie:0,

        /**
         * Opera version number or 0.  Example: 9.2
         * @property opera
         * @type float
         */
        opera:0,

        /**
         * Gecko engine revision number.  Will evaluate to 1 if Gecko 
         * is detected but the revision could not be found. Other browsers
         * will be 0.  Example: 1.8
         * <pre>
         * Firefox 1.0.0.4: 1.7.8   <-- Reports 1.7
         * Firefox 1.5.0.9: 1.8.0.9 <-- Reports 1.8
         * Firefox 2.0.0.3: 1.8.1.3 <-- Reports 1.8
         * Firefox 3 alpha: 1.9a4   <-- Reports 1.9
         * </pre>
         * @property gecko
         * @type float
         */
        gecko:0,

        /**
         * AppleWebKit version.  KHTML browsers that are not WebKit browsers 
         * will evaluate to 1, other browsers 0.  Example: 418.9.1
         * <pre>
         * Safari 1.3.2 (312.6): 312.8.1 <-- Reports 312.8 -- currently the 
         *                                   latest available for Mac OSX 10.3.
         * Safari 2.0.2:         416     <-- hasOwnProperty introduced
         * Safari 2.0.4:         418     <-- preventDefault fixed
         * Safari 2.0.4 (419.3): 418.9.1 <-- One version of Safari may run
         *                                   different versions of webkit
         * Safari 2.0.4 (419.3): 419     <-- Tiger installations that have been
         *                                   updated, but not updated
         *                                   to the latest patch.
         * Webkit 212 nightly:   522+    <-- Safari 3.0 precursor (with native SVG
         *                                   and many major issues fixed).  
         * 3.x yahoo.com, flickr:422     <-- Safari 3.x hacks the user agent
         *                                   string when hitting yahoo.com and 
         *                                   flickr.com.
         * Safari 3.0.4 (523.12):523.12  <-- First Tiger release - automatic update
         *                                   from 2.x via the 10.4.11 OS patch
         * Webkit nightly 1/2008:525+    <-- Supports DOMContentLoaded event.
         *                                   yahoo.com user agent hack removed.
         *                                   
         * </pre>
         * http://developer.apple.com/internet/safari/uamatrix.html
         * @property webkit
         * @type float
         */
        webkit: 0,

        /**
         * The mobile property will be set to a string containing any relevant
         * user agent information when a modern mobile browser is detected.
         * Currently limited to Safari on the iPhone/iPod Touch, Nokia N-series
         * devices with the WebKit-based browser, and Opera Mini.  
         * @property mobile 
         * @type string
         */
        mobile: null,

        /**
         * Adobe AIR version number or 0.  Only populated if webkit is detected.
         * Example: 1.0
         * @property air
         * @type float
         */
        air: 0

    };

    var ua=navigator.userAgent, m;

    // Modern KHTML browsers should qualify as Safari X-Grade
    if ((/KHTML/).test(ua)) {
        o.webkit=1;
    }
    // Modern WebKit browsers are at least X-Grade
    m=ua.match(/AppleWebKit\/([^\s]*)/);
    if (m&&m[1]) {
        o.webkit=parseFloat(m[1]);

        // Mobile browser check
        if (/ Mobile\//.test(ua)) {
            o.mobile = "Apple"; // iPhone or iPod Touch
        } else {
            m=ua.match(/NokiaN[^\/]*/);
            if (m) {
                o.mobile = m[0]; // Nokia N-series, ex: NokiaN95
            }
        }

        m=ua.match(/AdobeAIR\/([^\s]*)/);
        if (m) {
            o.air = m[0]; // Adobe AIR 1.0 or better
        }

    }

    if (!o.webkit) { // not webkit
        // @todo check Opera/8.01 (J2ME/MIDP; Opera Mini/2.0.4509/1316; fi; U; ssr)
        m=ua.match(/Opera[\s\/]([^\s]*)/);
        if (m&&m[1]) {
            o.opera=parseFloat(m[1]);
            m=ua.match(/Opera Mini[^;]*/);
            if (m) {
                o.mobile = m[0]; // ex: Opera Mini/2.0.4509/1316
            }
        } else { // not opera or webkit
            m=ua.match(/MSIE\s([^;]*)/);
            if (m&&m[1]) {
                o.ie=parseFloat(m[1]);
            } else { // not opera, webkit, or ie
                m=ua.match(/Gecko\/([^\s]*)/);
                if (m) {
                    o.gecko=1; // Gecko detected, look for revision
                    m=ua.match(/rv:([^\s\)]*)/);
                    if (m&&m[1]) {
                        o.gecko=parseFloat(m[1]);
                    }
                }
            }
        }
    }
    
    return o;
}();

/*
 * Initializes the global by creating the default namespaces and applying
 * any new configuration information that is detected.  This is the setup
 * for env.
 * @method init
 * @static
 * @private
 */
(function() {
    YAHOO.namespace("util", "widget", "example");
    if ("undefined" !== typeof YAHOO_config) {
        var l=YAHOO_config.listener,ls=YAHOO.env.listeners,unique=true,i;
        if (l) {
            // if YAHOO is loaded multiple times we need to check to see if
            // this is a new config object.  If it is, add the new component
            // load listener to the stack
            for (i=0;i<ls.length;i=i+1) {
                if (ls[i]==l) {
                    unique=false;
                    break;
                }
            }
            if (unique) {
                ls.push(l);
            }
        }
    }
})();
/**
 * Provides the language utilites and extensions used by the library
 * @class YAHOO.lang
 */
YAHOO.lang = YAHOO.lang || {};

(function() {

var L = YAHOO.lang,

    // ADD = ["toString", "valueOf", "hasOwnProperty"],
    ADD = ["toString", "valueOf"],

    OB = {

    /**
     * Determines whether or not the provided object is an array.
     * Testing typeof/instanceof/constructor of arrays across frame 
     * boundaries isn't possible in Safari unless you have a reference
     * to the other frame to test against its Array prototype.  To
     * handle this case, we test well-known array properties instead.
     * properties.
     * @method isArray
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isArray: function(o) { 
        if (o) {
           return L.isNumber(o.length) && L.isFunction(o.splice);
        }
        return false;
    },

    /**
     * Determines whether or not the provided object is a boolean
     * @method isBoolean
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isBoolean: function(o) {
        return typeof o === 'boolean';
    },
    
    /**
     * Determines whether or not the provided object is a function
     * @method isFunction
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isFunction: function(o) {
        return typeof o === 'function';
    },
        
    /**
     * Determines whether or not the provided object is null
     * @method isNull
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isNull: function(o) {
        return o === null;
    },
        
    /**
     * Determines whether or not the provided object is a legal number
     * @method isNumber
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isNumber: function(o) {
        return typeof o === 'number' && isFinite(o);
    },
      
    /**
     * Determines whether or not the provided object is of type object
     * or function
     * @method isObject
     * @param {any} o The object being testing
     * @return {boolean} the result
     */  
    isObject: function(o) {
return (o && (typeof o === 'object' || L.isFunction(o))) || false;
    },
        
    /**
     * Determines whether or not the provided object is a string
     * @method isString
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isString: function(o) {
        return typeof o === 'string';
    },
        
    /**
     * Determines whether or not the provided object is undefined
     * @method isUndefined
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isUndefined: function(o) {
        return typeof o === 'undefined';
    },
    
 
    /**
     * IE will not enumerate native functions in a derived object even if the
     * function was overridden.  This is a workaround for specific functions 
     * we care about on the Object prototype. 
     * @property _IEEnumFix
     * @param {Function} r  the object to receive the augmentation
     * @param {Function} s  the object that supplies the properties to augment
     * @static
     * @private
     */
    _IEEnumFix: (YAHOO.env.ua.ie) ? function(r, s) {
            for (var i=0;i<ADD.length;i=i+1) {
                var fname=ADD[i],f=s[fname];
                if (L.isFunction(f) && f!=Object.prototype[fname]) {
                    r[fname]=f;
                }
            }
    } : function(){},
       
    /**
     * Utility to set up the prototype, constructor and superclass properties to
     * support an inheritance strategy that can chain constructors and methods.
     * Static members will not be inherited.
     *
     * @method extend
     * @static
     * @param {Function} subc   the object to modify
     * @param {Function} superc the object to inherit
     * @param {Object} overrides  additional properties/methods to add to the
     *                              subclass prototype.  These will override the
     *                              matching items obtained from the superclass 
     *                              if present.
     */
    extend: function(subc, superc, overrides) {
        if (!superc||!subc) {
            throw new Error("extend failed, please check that " +
                            "all dependencies are included.");
        }
        var F = function() {};
        F.prototype=superc.prototype;
        subc.prototype=new F();
        subc.prototype.constructor=subc;
        subc.superclass=superc.prototype;
        if (superc.prototype.constructor == Object.prototype.constructor) {
            superc.prototype.constructor=superc;
        }
    
        if (overrides) {
            for (var i in overrides) {
                if (L.hasOwnProperty(overrides, i)) {
                    subc.prototype[i]=overrides[i];
                }
            }

            L._IEEnumFix(subc.prototype, overrides);
        }
    },
   
    /**
     * Applies all properties in the supplier to the receiver if the
     * receiver does not have these properties yet.  Optionally, one or 
     * more methods/properties can be specified (as additional 
     * parameters).  This option will overwrite the property if receiver 
     * has it already.  If true is passed as the third parameter, all 
     * properties will be applied and _will_ overwrite properties in 
     * the receiver.
     *
     * @method augmentObject
     * @static
     * @since 2.3.0
     * @param {Function} r  the object to receive the augmentation
     * @param {Function} s  the object that supplies the properties to augment
     * @param {String*|boolean}  arguments zero or more properties methods 
     *        to augment the receiver with.  If none specified, everything
     *        in the supplier will be used unless it would
     *        overwrite an existing property in the receiver. If true
     *        is specified as the third parameter, all properties will
     *        be applied and will overwrite an existing property in
     *        the receiver
     */
    augmentObject: function(r, s) {
        if (!s||!r) {
            throw new Error("Absorb failed, verify dependencies.");
        }
        var a=arguments, i, p, override=a[2];
        if (override && override!==true) { // only absorb the specified properties
            for (i=2; i<a.length; i=i+1) {
                r[a[i]] = s[a[i]];
            }
        } else { // take everything, overwriting only if the third parameter is true
            for (p in s) { 
                if (override || !(p in r)) {
                    r[p] = s[p];
                }
            }
            
            L._IEEnumFix(r, s);
        }
    },
 
    /**
     * Same as YAHOO.lang.augmentObject, except it only applies prototype properties
     * @see YAHOO.lang.augmentObject
     * @method augmentProto
     * @static
     * @param {Function} r  the object to receive the augmentation
     * @param {Function} s  the object that supplies the properties to augment
     * @param {String*|boolean}  arguments zero or more properties methods 
     *        to augment the receiver with.  If none specified, everything 
     *        in the supplier will be used unless it would overwrite an existing 
     *        property in the receiver.  if true is specified as the third 
     *        parameter, all properties will be applied and will overwrite an 
     *        existing property in the receiver
     */
    augmentProto: function(r, s) {
        if (!s||!r) {
            throw new Error("Augment failed, verify dependencies.");
        }
        //var a=[].concat(arguments);
        var a=[r.prototype,s.prototype];
        for (var i=2;i<arguments.length;i=i+1) {
            a.push(arguments[i]);
        }
        L.augmentObject.apply(this, a);
    },

      
    /**
     * Returns a simple string representation of the object or array.
     * Other types of objects will be returned unprocessed.  Arrays
     * are expected to be indexed.  Use object notation for
     * associative arrays.
     * @method dump
     * @since 2.3.0
     * @param o {Object} The object to dump
     * @param d {int} How deep to recurse child objects, default 3
     * @return {String} the dump result
     */
    dump: function(o, d) {
        var i,len,s=[],OBJ="{...}",FUN="f(){...}",
            COMMA=', ', ARROW=' => ';

        // Cast non-objects to string
        // Skip dates because the std toString is what we want
        // Skip HTMLElement-like objects because trying to dump 
        // an element will cause an unhandled exception in FF 2.x
        if (!L.isObject(o)) {
            return o + "";
        } else if (o instanceof Date || ("nodeType" in o && "tagName" in o)) {
            return o;
        } else if  (L.isFunction(o)) {
            return FUN;
        }

        // dig into child objects the depth specifed. Default 3
        d = (L.isNumber(d)) ? d : 3;

        // arrays [1, 2, 3]
        if (L.isArray(o)) {
            s.push("[");
            for (i=0,len=o.length;i<len;i=i+1) {
                if (L.isObject(o[i])) {
                    s.push((d > 0) ? L.dump(o[i], d-1) : OBJ);
                } else {
                    s.push(o[i]);
                }
                s.push(COMMA);
            }
            if (s.length > 1) {
                s.pop();
            }
            s.push("]");
        // objects {k1 => v1, k2 => v2}
        } else {
            s.push("{");
            for (i in o) {
                if (L.hasOwnProperty(o, i)) {
                    s.push(i + ARROW);
                    if (L.isObject(o[i])) {
                        s.push((d > 0) ? L.dump(o[i], d-1) : OBJ);
                    } else {
                        s.push(o[i]);
                    }
                    s.push(COMMA);
                }
            }
            if (s.length > 1) {
                s.pop();
            }
            s.push("}");
        }

        return s.join("");
    },

    /**
     * Does variable substitution on a string. It scans through the string 
     * looking for expressions enclosed in { } braces. If an expression 
     * is found, it is used a key on the object.  If there is a space in
     * the key, the first word is used for the key and the rest is provided
     * to an optional function to be used to programatically determine the
     * value (the extra information might be used for this decision). If 
     * the value for the key in the object, or what is returned from the
     * function has a string value, number value, or object value, it is 
     * substituted for the bracket expression and it repeats.  If this
     * value is an object, it uses the Object's toString() if this has
     * been overridden, otherwise it does a shallow dump of the key/value
     * pairs.
     * @method substitute
     * @since 2.3.0
     * @param s {String} The string that will be modified.
     * @param o {Object} An object containing the replacement values
     * @param f {Function} An optional function that can be used to
     *                     process each match.  It receives the key,
     *                     value, and any extra metadata included with
     *                     the key inside of the braces.
     * @return {String} the substituted string
     */
    substitute: function (s, o, f) {
        var i, j, k, key, v, meta, saved=[], token, 
            DUMP='dump', SPACE=' ', LBRACE='{', RBRACE='}';


        for (;;) {
            i = s.lastIndexOf(LBRACE);
            if (i < 0) {
                break;
            }
            j = s.indexOf(RBRACE, i);
            if (i + 1 >= j) {
                break;
            }

            //Extract key and meta info 
            token = s.substring(i + 1, j);
            key = token;
            meta = null;
            k = key.indexOf(SPACE);
            if (k > -1) {
                meta = key.substring(k + 1);
                key = key.substring(0, k);
            }

            // lookup the value
            v = o[key];

            // if a substitution function was provided, execute it
            if (f) {
                v = f(key, v, meta);
            }

            if (L.isObject(v)) {
                if (L.isArray(v)) {
                    v = L.dump(v, parseInt(meta, 10));
                } else {
                    meta = meta || "";

                    // look for the keyword 'dump', if found force obj dump
                    var dump = meta.indexOf(DUMP);
                    if (dump > -1) {
                        meta = meta.substring(4);
                    }

                    // use the toString if it is not the Object toString 
                    // and the 'dump' meta info was not found
                    if (v.toString===Object.prototype.toString||dump>-1) {
                        v = L.dump(v, parseInt(meta, 10));
                    } else {
                        v = v.toString();
                    }
                }
            } else if (!L.isString(v) && !L.isNumber(v)) {
                // This {block} has no replace string. Save it for later.
                v = "~-" + saved.length + "-~";
                saved[saved.length] = token;

                // break;
            }

            s = s.substring(0, i) + v + s.substring(j + 1);


        }

        // restore saved {block}s
        for (i=saved.length-1; i>=0; i=i-1) {
            s = s.replace(new RegExp("~-" + i + "-~"), "{"  + saved[i] + "}", "g");
        }

        return s;
    },


    /**
     * Returns a string without any leading or trailing whitespace.  If 
     * the input is not a string, the input will be returned untouched.
     * @method trim
     * @since 2.3.0
     * @param s {string} the string to trim
     * @return {string} the trimmed string
     */
    trim: function(s){
        try {
            return s.replace(/^\s+|\s+$/g, "");
        } catch(e) {
            return s;
        }
    },

    /**
     * Returns a new object containing all of the properties of
     * all the supplied objects.  The properties from later objects
     * will overwrite those in earlier objects.
     * @method merge
     * @since 2.3.0
     * @param arguments {Object*} the objects to merge
     * @return the new merged object
     */
    merge: function() {
        var o={}, a=arguments;
        for (var i=0, l=a.length; i<l; i=i+1) {
            L.augmentObject(o, a[i], true);
        }
        return o;
    },

    /**
     * Executes the supplied function in the context of the supplied 
     * object 'when' milliseconds later.  Executes the function a 
     * single time unless periodic is set to true.
     * @method later
     * @since 2.4.0
     * @param when {int} the number of milliseconds to wait until the fn 
     * is executed
     * @param o the context object
     * @param fn {Function|String} the function to execute or the name of 
     * the method in the 'o' object to execute
     * @param data [Array] data that is provided to the function.  This accepts
     * either a single item or an array.  If an array is provided, the
     * function is executed with one parameter for each array item.  If
     * you need to pass a single array parameter, it needs to be wrapped in
     * an array [myarray]
     * @param periodic {boolean} if true, executes continuously at supplied 
     * interval until canceled
     * @return a timer object. Call the cancel() method on this object to 
     * stop the timer.
     */
    later: function(when, o, fn, data, periodic) {
        when = when || 0; 
        o = o || {};
        var m=fn, d=data, f, r;

        if (L.isString(fn)) {
            m = o[fn];
        }

        if (!m) {
            throw new TypeError("method undefined");
        }

        if (!L.isArray(d)) {
            d = [data];
        }

        f = function() {
            m.apply(o, d);
        };

        r = (periodic) ? setInterval(f, when) : setTimeout(f, when);

        return {
            interval: periodic,
            cancel: function() {
                if (this.interval) {
                    clearInterval(r);
                } else {
                    clearTimeout(r);
                }
            }
        };
    },
    
    /**
     * A convenience method for detecting a legitimate non-null value.
     * Returns false for null/undefined/NaN, true for other values, 
     * including 0/false/''
     * @method isValue
     * @since 2.3.0
     * @param o {any} the item to test
     * @return {boolean} true if it is not null/undefined/NaN || false
     */
    isValue: function(o) {
        // return (o || o === false || o === 0 || o === ''); // Infinity fails
return (L.isObject(o) || L.isString(o) || L.isNumber(o) || L.isBoolean(o));
    }

};

/**
 * Determines whether or not the property was added
 * to the object instance.  Returns false if the property is not present
 * in the object, or was inherited from the prototype.
 * This abstraction is provided to enable hasOwnProperty for Safari 1.3.x.
 * There is a discrepancy between YAHOO.lang.hasOwnProperty and
 * Object.prototype.hasOwnProperty when the property is a primitive added to
 * both the instance AND prototype with the same value:
 * <pre>
 * var A = function() {};
 * A.prototype.foo = 'foo';
 * var a = new A();
 * a.foo = 'foo';
 * alert(a.hasOwnProperty('foo')); // true
 * alert(YAHOO.lang.hasOwnProperty(a, 'foo')); // false when using fallback
 * </pre>
 * @method hasOwnProperty
 * @param {any} o The object being testing
 * @param prop {string} the name of the property to test
 * @return {boolean} the result
 */
L.hasOwnProperty = (Object.prototype.hasOwnProperty) ?
    function(o, prop) {
        return o && o.hasOwnProperty(prop);
    } : function(o, prop) {
        return !L.isUndefined(o[prop]) && 
                o.constructor.prototype[prop] !== o[prop];
    };

// new lang wins
OB.augmentObject(L, OB, true);

/*
 * An alias for <a href="YAHOO.lang.html">YAHOO.lang</a>
 * @class YAHOO.util.Lang
 */
YAHOO.util.Lang = L;
 
/**
 * Same as YAHOO.lang.augmentObject, except it only applies prototype 
 * properties.  This is an alias for augmentProto.
 * @see YAHOO.lang.augmentObject
 * @method augment
 * @static
 * @param {Function} r  the object to receive the augmentation
 * @param {Function} s  the object that supplies the properties to augment
 * @param {String*|boolean}  arguments zero or more properties methods to 
 *        augment the receiver with.  If none specified, everything
 *        in the supplier will be used unless it would
 *        overwrite an existing property in the receiver.  if true
 *        is specified as the third parameter, all properties will
 *        be applied and will overwrite an existing property in
 *        the receiver
 */
L.augment = L.augmentProto;

/**
 * An alias for <a href="YAHOO.lang.html#augment">YAHOO.lang.augment</a>
 * @for YAHOO
 * @method augment
 * @static
 * @param {Function} r  the object to receive the augmentation
 * @param {Function} s  the object that supplies the properties to augment
 * @param {String*}  arguments zero or more properties methods to 
 *        augment the receiver with.  If none specified, everything
 *        in the supplier will be used unless it would
 *        overwrite an existing property in the receiver
 */
YAHOO.augment = L.augmentProto;
       
/**
 * An alias for <a href="YAHOO.lang.html#extend">YAHOO.lang.extend</a>
 * @method extend
 * @static
 * @param {Function} subc   the object to modify
 * @param {Function} superc the object to inherit
 * @param {Object} overrides  additional properties/methods to add to the
 *        subclass prototype.  These will override the
 *        matching items obtained from the superclass if present.
 */
YAHOO.extend = L.extend;

})();
YAHOO.register("yahoo", YAHOO, {version: "2.6.0", build: "1321"});
/*
Copyright (c) 2008, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.6.0
*/
/**
 * The dom module provides helper methods for manipulating Dom elements.
 * @module dom
 *
 */

(function() {
    var Y = YAHOO.util,     // internal shorthand
        lang = YAHOO.lang,
        getStyle,           // for load time browser branching
        setStyle,           // ditto
        propertyCache = {}, // for faster hyphen converts
        reClassNameCache = {},          // cache regexes for className
        document = window.document;     // cache for faster lookups
    
    YAHOO.env._id_counter = YAHOO.env._id_counter || 0;     // for use with generateId (global to save state if Dom is overwritten)

    // brower detection
    var isOpera = YAHOO.env.ua.opera,
        isSafari = YAHOO.env.ua.webkit, 
        isGecko = YAHOO.env.ua.gecko,
        isIE = YAHOO.env.ua.ie; 
    
    // regex cache
    var patterns = {
        HYPHEN: /(-[a-z])/i, // to normalize get/setStyle
        ROOT_TAG: /^body|html$/i, // body for quirks mode, html for standards,
        OP_SCROLL:/^(?:inline|table-row)$/i
    };

    var toCamel = function(property) {
        if ( !patterns.HYPHEN.test(property) ) {
            return property; // no hyphens
        }
        
        if (propertyCache[property]) { // already converted
            return propertyCache[property];
        }
       
        var converted = property;
 
        while( patterns.HYPHEN.exec(converted) ) {
            converted = converted.replace(RegExp.$1,
                    RegExp.$1.substr(1).toUpperCase());
        }
        
        propertyCache[property] = converted;
        return converted;
        //return property.replace(/-([a-z])/gi, function(m0, m1) {return m1.toUpperCase()}) // cant use function as 2nd arg yet due to safari bug
    };
    
    var getClassRegEx = function(className) {
        var re = reClassNameCache[className];
        if (!re) {
            re = new RegExp('(?:^|\\s+)' + className + '(?:\\s+|$)');
            reClassNameCache[className] = re;
        }
        return re;
    };

    // branching at load instead of runtime
    if (document.defaultView && document.defaultView.getComputedStyle) { // W3C DOM method
        getStyle = function(el, property) {
            var value = null;
            
            if (property == 'float') { // fix reserved word
                property = 'cssFloat';
            }

            var computed = el.ownerDocument.defaultView.getComputedStyle(el, '');
            if (computed) { // test computed before touching for safari
                value = computed[toCamel(property)];
            }
            
            return el.style[property] || value;
        };
    } else if (document.documentElement.currentStyle && isIE) { // IE method
        getStyle = function(el, property) {                         
            switch( toCamel(property) ) {
                case 'opacity' :// IE opacity uses filter
                    var val = 100;
                    try { // will error if no DXImageTransform
                        val = el.filters['DXImageTransform.Microsoft.Alpha'].opacity;

                    } catch(e) {
                        try { // make sure its in the document
                            val = el.filters('alpha').opacity;
                        } catch(e) {
                        }
                    }
                    return val / 100;
                case 'float': // fix reserved word
                    property = 'styleFloat'; // fall through
                default: 
                    // test currentStyle before touching
                    var value = el.currentStyle ? el.currentStyle[property] : null;
                    return ( el.style[property] || value );
            }
        };
    } else { // default to inline only
        getStyle = function(el, property) { return el.style[property]; };
    }
    
    if (isIE) {
        setStyle = function(el, property, val) {
            switch (property) {
                case 'opacity':
                    if ( lang.isString(el.style.filter) ) { // in case not appended
                        el.style.filter = 'alpha(opacity=' + val * 100 + ')';
                        
                        if (!el.currentStyle || !el.currentStyle.hasLayout) {
                            el.style.zoom = 1; // when no layout or cant tell
                        }
                    }
                    break;
                case 'float':
                    property = 'styleFloat';
                default:
                el.style[property] = val;
            }
        };
    } else {
        setStyle = function(el, property, val) {
            if (property == 'float') {
                property = 'cssFloat';
            }
            el.style[property] = val;
        };
    }

    var testElement = function(node, method) {
        return node && node.nodeType == 1 && ( !method || method(node) );
    };

    /**
     * Provides helper methods for DOM elements.
     * @namespace YAHOO.util
     * @class Dom
     */
    YAHOO.util.Dom = {
        /**
         * Returns an HTMLElement reference.
         * @method get
         * @param {String | HTMLElement |Array} el Accepts a string to use as an ID for getting a DOM reference, an actual DOM reference, or an Array of IDs and/or HTMLElements.
         * @return {HTMLElement | Array} A DOM reference to an HTML element or an array of HTMLElements.
         */
        get: function(el) {
            if (el) {
                if (el.nodeType || el.item) { // Node, or NodeList
                    return el;
                }

                if (typeof el === 'string') { // id
                    return document.getElementById(el);
                }
                
                if ('length' in el) { // array-like 
                    var c = [];
                    for (var i = 0, len = el.length; i < len; ++i) {
                        c[c.length] = Y.Dom.get(el[i]);
                    }
                    
                    return c;
                }

                return el; // some other object, just pass it back
            }

            return null;
        },
    
        /**
         * Normalizes currentStyle and ComputedStyle.
         * @method getStyle
         * @param {String | HTMLElement |Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
         * @param {String} property The style property whose value is returned.
         * @return {String | Array} The current value of the style property for the element(s).
         */
        getStyle: function(el, property) {
            property = toCamel(property);
            
            var f = function(element) {
                return getStyle(element, property);
            };
            
            return Y.Dom.batch(el, f, Y.Dom, true);
        },
    
        /**
         * Wrapper for setting style properties of HTMLElements.  Normalizes "opacity" across modern browsers.
         * @method setStyle
         * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
         * @param {String} property The style property to be set.
         * @param {String} val The value to apply to the given property.
         */
        setStyle: function(el, property, val) {
            property = toCamel(property);
            
            var f = function(element) {
                setStyle(element, property, val);
                
            };
            
            Y.Dom.batch(el, f, Y.Dom, true);
        },
        
        /**
         * Gets the current position of an element based on page coordinates.  Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
         * @method getXY
         * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements
         * @return {Array} The XY position of the element(s)
         */
        getXY: function(el) {
            var f = function(el) {
                // has to be part of document to have pageXY
                if ( (el.parentNode === null || el.offsetParent === null ||
                        this.getStyle(el, 'display') == 'none') && el != el.ownerDocument.body) {
                    return false;
                }
                
                return getXY(el);
            };
            
            return Y.Dom.batch(el, f, Y.Dom, true);
        },
        
        /**
         * Gets the current X position of an element based on page coordinates.  The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
         * @method getX
         * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements
         * @return {Number | Array} The X position of the element(s)
         */
        getX: function(el) {
            var f = function(el) {
                return Y.Dom.getXY(el)[0];
            };
            
            return Y.Dom.batch(el, f, Y.Dom, true);
        },
        
        /**
         * Gets the current Y position of an element based on page coordinates.  Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
         * @method getY
         * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements
         * @return {Number | Array} The Y position of the element(s)
         */
        getY: function(el) {
            var f = function(el) {
                return Y.Dom.getXY(el)[1];
            };
            
            return Y.Dom.batch(el, f, Y.Dom, true);
        },
        
        /**
         * Set the position of an html element in page coordinates, regardless of how the element is positioned.
         * The element(s) must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
         * @method setXY
         * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements
         * @param {Array} pos Contains X & Y values for new position (coordinates are page-based)
         * @param {Boolean} noRetry By default we try and set the position a second time if the first fails
         */
        setXY: function(el, pos, noRetry) {
            var f = function(el) {
                var style_pos = this.getStyle(el, 'position');
                if (style_pos == 'static') { // default to relative
                    this.setStyle(el, 'position', 'relative');
                    style_pos = 'relative';
                }

                var pageXY = this.getXY(el);
                if (pageXY === false) { // has to be part of doc to have pageXY
                    return false; 
                }
                
                var delta = [ // assuming pixels; if not we will have to retry
                    parseInt( this.getStyle(el, 'left'), 10 ),
                    parseInt( this.getStyle(el, 'top'), 10 )
                ];
            
                if ( isNaN(delta[0]) ) {// in case of 'auto'
                    delta[0] = (style_pos == 'relative') ? 0 : el.offsetLeft;
                } 
                if ( isNaN(delta[1]) ) { // in case of 'auto'
                    delta[1] = (style_pos == 'relative') ? 0 : el.offsetTop;
                } 
        
                if (pos[0] !== null) { el.style.left = pos[0] - pageXY[0] + delta[0] + 'px'; }
                if (pos[1] !== null) { el.style.top = pos[1] - pageXY[1] + delta[1] + 'px'; }
              
                if (!noRetry) {
                    var newXY = this.getXY(el);

                    // if retry is true, try one more time if we miss 
                   if ( (pos[0] !== null && newXY[0] != pos[0]) || 
                        (pos[1] !== null && newXY[1] != pos[1]) ) {
                       this.setXY(el, pos, true);
                   }
                }        
        
            };
            
            Y.Dom.batch(el, f, Y.Dom, true);
        },
        
        /**
         * Set the X position of an html element in page coordinates, regardless of how the element is positioned.
         * The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
         * @method setX
         * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
         * @param {Int} x The value to use as the X coordinate for the element(s).
         */
        setX: function(el, x) {
            Y.Dom.setXY(el, [x, null]);
        },
        
        /**
         * Set the Y position of an html element in page coordinates, regardless of how the element is positioned.
         * The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
         * @method setY
         * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
         * @param {Int} x To use as the Y coordinate for the element(s).
         */
        setY: function(el, y) {
            Y.Dom.setXY(el, [null, y]);
        },
        
        /**
         * Returns the region position of the given element.
         * The element must be part of the DOM tree to have a region (display:none or elements not appended return false).
         * @method getRegion
         * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
         * @return {Region | Array} A Region or array of Region instances containing "top, left, bottom, right" member data.
         */
        getRegion: function(el) {
            var f = function(el) {
                if ( (el.parentNode === null || el.offsetParent === null ||
                        this.getStyle(el, 'display') == 'none') && el != el.ownerDocument.body) {
                    return false;
                }

                var region = Y.Region.getRegion(el);
                return region;
            };
            
            return Y.Dom.batch(el, f, Y.Dom, true);
        },
        
        /**
         * Returns the width of the client (viewport).
         * @method getClientWidth
         * @deprecated Now using getViewportWidth.  This interface left intact for back compat.
         * @return {Int} The width of the viewable area of the page.
         */
        getClientWidth: function() {
            return Y.Dom.getViewportWidth();
        },
        
        /**
         * Returns the height of the client (viewport).
         * @method getClientHeight
         * @deprecated Now using getViewportHeight.  This interface left intact for back compat.
         * @return {Int} The height of the viewable area of the page.
         */
        getClientHeight: function() {
            return Y.Dom.getViewportHeight();
        },

        /**
         * Returns a array of HTMLElements with the given class.
         * For optimized performance, include a tag and/or root node when possible.
         * Note: This method operates against a live collection, so modifying the 
         * collection in the callback (removing/appending nodes, etc.) will have
         * side effects.  Instead you should iterate the returned nodes array,
         * as you would with the native "getElementsByTagName" method. 
         * @method getElementsByClassName
         * @param {String} className The class name to match against
         * @param {String} tag (optional) The tag name of the elements being collected
         * @param {String | HTMLElement} root (optional) The HTMLElement or an ID to use as the starting point 
         * @param {Function} apply (optional) A function to apply to each element when found 
         * @return {Array} An array of elements that have the given class name
         */
        getElementsByClassName: function(className, tag, root, apply) {
            className = lang.trim(className);
            tag = tag || '*';
            root = (root) ? Y.Dom.get(root) : null || document; 
            if (!root) {
                return [];
            }

            var nodes = [],
                elements = root.getElementsByTagName(tag),
                re = getClassRegEx(className);

            for (var i = 0, len = elements.length; i < len; ++i) {
                if ( re.test(elements[i].className) ) {
                    nodes[nodes.length] = elements[i];
                    if (apply) {
                        apply.call(elements[i], elements[i]);
                    }
                }
            }
            
            return nodes;
        },

        /**
         * Determines whether an HTMLElement has the given className.
         * @method hasClass
         * @param {String | HTMLElement | Array} el The element or collection to test
         * @param {String} className the class name to search for
         * @return {Boolean | Array} A boolean value or array of boolean values
         */
        hasClass: function(el, className) {
            var re = getClassRegEx(className);

            var f = function(el) {
                return re.test(el.className);
            };
            
            return Y.Dom.batch(el, f, Y.Dom, true);
        },
    
        /**
         * Adds a class name to a given element or collection of elements.
         * @method addClass         
         * @param {String | HTMLElement | Array} el The element or collection to add the class to
         * @param {String} className the class name to add to the class attribute
         * @return {Boolean | Array} A pass/fail boolean or array of booleans
         */
        addClass: function(el, className) {
            var f = function(el) {
                if (this.hasClass(el, className)) {
                    return false; // already present
                }
                
                
                el.className = lang.trim([el.className, className].join(' '));
                return true;
            };
            
            return Y.Dom.batch(el, f, Y.Dom, true);
        },
    
        /**
         * Removes a class name from a given element or collection of elements.
         * @method removeClass         
         * @param {String | HTMLElement | Array} el The element or collection to remove the class from
         * @param {String} className the class name to remove from the class attribute
         * @return {Boolean | Array} A pass/fail boolean or array of booleans
         */
        removeClass: function(el, className) {
            var re = getClassRegEx(className);
            
            var f = function(el) {
                var ret = false,
                    current = el.className;

                if (className && current && this.hasClass(el, className)) {
                    
                    el.className = current.replace(re, ' ');
                    if ( this.hasClass(el, className) ) { // in case of multiple adjacent
                        this.removeClass(el, className);
                    }

                    el.className = lang.trim(el.className); // remove any trailing spaces
                    if (el.className === '') { // remove class attribute if empty
                        var attr = (el.hasAttribute) ? 'class' : 'className';
                        el.removeAttribute(attr);
                    }
                    ret = true;
                }                 
                return ret;
            };
            
            return Y.Dom.batch(el, f, Y.Dom, true);
        },
        
        /**
         * Replace a class with another class for a given element or collection of elements.
         * If no oldClassName is present, the newClassName is simply added.
         * @method replaceClass  
         * @param {String | HTMLElement | Array} el The element or collection to remove the class from
         * @param {String} oldClassName the class name to be replaced
         * @param {String} newClassName the class name that will be replacing the old class name
         * @return {Boolean | Array} A pass/fail boolean or array of booleans
         */
        replaceClass: function(el, oldClassName, newClassName) {
            if (!newClassName || oldClassName === newClassName) { // avoid infinite loop
                return false;
            }
            
            var re = getClassRegEx(oldClassName);

            var f = function(el) {
            
                if ( !this.hasClass(el, oldClassName) ) {
                    this.addClass(el, newClassName); // just add it if nothing to replace
                    return true; // NOTE: return
                }
            
                el.className = el.className.replace(re, ' ' + newClassName + ' ');

                if ( this.hasClass(el, oldClassName) ) { // in case of multiple adjacent
                    this.removeClass(el, oldClassName);
                }

                el.className = lang.trim(el.className); // remove any trailing spaces
                return true;
            };
            
            return Y.Dom.batch(el, f, Y.Dom, true);
        },
        
        /**
         * Returns an ID and applies it to the element "el", if provided.
         * @method generateId  
         * @param {String | HTMLElement | Array} el (optional) An optional element array of elements to add an ID to (no ID is added if one is already present).
         * @param {String} prefix (optional) an optional prefix to use (defaults to "yui-gen").
         * @return {String | Array} The generated ID, or array of generated IDs (or original ID if already present on an element)
         */
        generateId: function(el, prefix) {
            prefix = prefix || 'yui-gen';

            var f = function(el) {
                if (el && el.id) { // do not override existing ID
                    return el.id;
                } 

                var id = prefix + YAHOO.env._id_counter++;

                if (el) {
                    el.id = id;
                }
                
                return id;
            };

            // batch fails when no element, so just generate and return single ID
            return Y.Dom.batch(el, f, Y.Dom, true) || f.apply(Y.Dom, arguments);
        },
        
        /**
         * Determines whether an HTMLElement is an ancestor of another HTML element in the DOM hierarchy.
         * @method isAncestor
         * @param {String | HTMLElement} haystack The possible ancestor
         * @param {String | HTMLElement} needle The possible descendent
         * @return {Boolean} Whether or not the haystack is an ancestor of needle
         */
        isAncestor: function(haystack, needle) {
            haystack = Y.Dom.get(haystack);
            needle = Y.Dom.get(needle);
            
            var ret = false;

            if ( (haystack && needle) && (haystack.nodeType && needle.nodeType) ) {
                if (haystack.contains && haystack !== needle) { // contains returns true when equal
                    ret = haystack.contains(needle);
                }
                else if (haystack.compareDocumentPosition) { // gecko
                    ret = !!(haystack.compareDocumentPosition(needle) & 16);
                }
            } else {
            }
            return ret;
        },
        
        /**
         * Determines whether an HTMLElement is present in the current document.
         * @method inDocument         
         * @param {String | HTMLElement} el The element to search for
         * @return {Boolean} Whether or not the element is present in the current document
         */
        inDocument: function(el) {
            return this.isAncestor(document.documentElement, el);
        },
        
        /**
         * Returns a array of HTMLElements that pass the test applied by supplied boolean method.
         * For optimized performance, include a tag and/or root node when possible.
         * Note: This method operates against a live collection, so modifying the 
         * collection in the callback (removing/appending nodes, etc.) will have
         * side effects.  Instead you should iterate the returned nodes array,
         * as you would with the native "getElementsByTagName" method. 
         * @method getElementsBy
         * @param {Function} method - A boolean method for testing elements which receives the element as its only argument.
         * @param {String} tag (optional) The tag name of the elements being collected
         * @param {String | HTMLElement} root (optional) The HTMLElement or an ID to use as the starting point 
         * @param {Function} apply (optional) A function to apply to each element when found 
         * @return {Array} Array of HTMLElements
         */
        getElementsBy: function(method, tag, root, apply) {
            tag = tag || '*';
            root = (root) ? Y.Dom.get(root) : null || document; 

            if (!root) {
                return [];
            }

            var nodes = [],
                elements = root.getElementsByTagName(tag);
            
            for (var i = 0, len = elements.length; i < len; ++i) {
                if ( method(elements[i]) ) {
                    nodes[nodes.length] = elements[i];
                    if (apply) {
                        apply(elements[i]);
                    }
                }
            }

            
            return nodes;
        },
        
        /**
         * Runs the supplied method against each item in the Collection/Array.
         * The method is called with the element(s) as the first arg, and the optional param as the second ( method(el, o) ).
         * @method batch
         * @param {String | HTMLElement | Array} el (optional) An element or array of elements to apply the method to
         * @param {Function} method The method to apply to the element(s)
         * @param {Any} o (optional) An optional arg that is passed to the supplied method
         * @param {Boolean} override (optional) Whether or not to override the scope of "method" with "o"
         * @return {Any | Array} The return value(s) from the supplied method
         */
        batch: function(el, method, o, override) {
            el = (el && (el.tagName || el.item)) ? el : Y.Dom.get(el); // skip get() when possible

            if (!el || !method) {
                return false;
            } 
            var scope = (override) ? o : window;
            
            if (el.tagName || el.length === undefined) { // element or not array-like 
                return method.call(scope, el, o);
            } 

            var collection = [];
            
            for (var i = 0, len = el.length; i < len; ++i) {
                collection[collection.length] = method.call(scope, el[i], o);
            }
            
            return collection;
        },
        
        /**
         * Returns the height of the document.
         * @method getDocumentHeight
         * @return {Int} The height of the actual document (which includes the body and its margin).
         */
        getDocumentHeight: function() {
            var scrollHeight = (document.compatMode != 'CSS1Compat') ? document.body.scrollHeight : document.documentElement.scrollHeight;

            var h = Math.max(scrollHeight, Y.Dom.getViewportHeight());
            return h;
        },
        
        /**
         * Returns the width of the document.
         * @method getDocumentWidth
         * @return {Int} The width of the actual document (which includes the body and its margin).
         */
        getDocumentWidth: function() {
            var scrollWidth = (document.compatMode != 'CSS1Compat') ? document.body.scrollWidth : document.documentElement.scrollWidth;
            var w = Math.max(scrollWidth, Y.Dom.getViewportWidth());
            return w;
        },

        /**
         * Returns the current height of the viewport.
         * @method getViewportHeight
         * @return {Int} The height of the viewable area of the page (excludes scrollbars).
         */
        getViewportHeight: function() {
            var height = self.innerHeight; // Safari, Opera
            var mode = document.compatMode;
        
            if ( (mode || isIE) && !isOpera ) { // IE, Gecko
                height = (mode == 'CSS1Compat') ?
                        document.documentElement.clientHeight : // Standards
                        document.body.clientHeight; // Quirks
            }
        
            return height;
        },
        
        /**
         * Returns the current width of the viewport.
         * @method getViewportWidth
         * @return {Int} The width of the viewable area of the page (excludes scrollbars).
         */
        
        getViewportWidth: function() {
            var width = self.innerWidth;  // Safari
            var mode = document.compatMode;
            
            if (mode || isIE) { // IE, Gecko, Opera
                width = (mode == 'CSS1Compat') ?
                        document.documentElement.clientWidth : // Standards
                        document.body.clientWidth; // Quirks
            }
            return width;
        },

       /**
         * Returns the nearest ancestor that passes the test applied by supplied boolean method.
         * For performance reasons, IDs are not accepted and argument validation omitted.
         * @method getAncestorBy
         * @param {HTMLElement} node The HTMLElement to use as the starting point 
         * @param {Function} method - A boolean method for testing elements which receives the element as its only argument.
         * @return {Object} HTMLElement or null if not found
         */
        getAncestorBy: function(node, method) {
            while ( (node = node.parentNode) ) { // NOTE: assignment
                if ( testElement(node, method) ) {
                    return node;
                }
            } 

            return null;
        },
        
        /**
         * Returns the nearest ancestor with the given className.
         * @method getAncestorByClassName
         * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point 
         * @param {String} className
         * @return {Object} HTMLElement
         */
        getAncestorByClassName: function(node, className) {
            node = Y.Dom.get(node);
            if (!node) {
                return null;
            }
            var method = function(el) { return Y.Dom.hasClass(el, className); };
            return Y.Dom.getAncestorBy(node, method);
        },

        /**
         * Returns the nearest ancestor with the given tagName.
         * @method getAncestorByTagName
         * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point 
         * @param {String} tagName
         * @return {Object} HTMLElement
         */
        getAncestorByTagName: function(node, tagName) {
            node = Y.Dom.get(node);
            if (!node) {
                return null;
            }
            var method = function(el) {
                 return el.tagName && el.tagName.toUpperCase() == tagName.toUpperCase();
            };

            return Y.Dom.getAncestorBy(node, method);
        },

        /**
         * Returns the previous sibling that is an HTMLElement. 
         * For performance reasons, IDs are not accepted and argument validation omitted.
         * Returns the nearest HTMLElement sibling if no method provided.
         * @method getPreviousSiblingBy
         * @param {HTMLElement} node The HTMLElement to use as the starting point 
         * @param {Function} method A boolean function used to test siblings
         * that receives the sibling node being tested as its only argument
         * @return {Object} HTMLElement or null if not found
         */
        getPreviousSiblingBy: function(node, method) {
            while (node) {
                node = node.previousSibling;
                if ( testElement(node, method) ) {
                    return node;
                }
            }
            return null;
        }, 

        /**
         * Returns the previous sibling that is an HTMLElement 
         * @method getPreviousSibling
         * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point 
         * @return {Object} HTMLElement or null if not found
         */
        getPreviousSibling: function(node) {
            node = Y.Dom.get(node);
            if (!node) {
                return null;
            }

            return Y.Dom.getPreviousSiblingBy(node);
        }, 

        /**
         * Returns the next HTMLElement sibling that passes the boolean method. 
         * For performance reasons, IDs are not accepted and argument validation omitted.
         * Returns the nearest HTMLElement sibling if no method provided.
         * @method getNextSiblingBy
         * @param {HTMLElement} node The HTMLElement to use as the starting point 
         * @param {Function} method A boolean function used to test siblings
         * that receives the sibling node being tested as its only argument
         * @return {Object} HTMLElement or null if not found
         */
        getNextSiblingBy: function(node, method) {
            while (node) {
                node = node.nextSibling;
                if ( testElement(node, method) ) {
                    return node;
                }
            }
            return null;
        }, 

        /**
         * Returns the next sibling that is an HTMLElement 
         * @method getNextSibling
         * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point 
         * @return {Object} HTMLElement or null if not found
         */
        getNextSibling: function(node) {
            node = Y.Dom.get(node);
            if (!node) {
                return null;
            }

            return Y.Dom.getNextSiblingBy(node);
        }, 

        /**
         * Returns the first HTMLElement child that passes the test method. 
         * @method getFirstChildBy
         * @param {HTMLElement} node The HTMLElement to use as the starting point 
         * @param {Function} method A boolean function used to test children
         * that receives the node being tested as its only argument
         * @return {Object} HTMLElement or null if not found
         */
        getFirstChildBy: function(node, method) {
            var child = ( testElement(node.firstChild, method) ) ? node.firstChild : null;
            return child || Y.Dom.getNextSiblingBy(node.firstChild, method);
        }, 

        /**
         * Returns the first HTMLElement child. 
         * @method getFirstChild
         * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point 
         * @return {Object} HTMLElement or null if not found
         */
        getFirstChild: function(node, method) {
            node = Y.Dom.get(node);
            if (!node) {
                return null;
            }
            return Y.Dom.getFirstChildBy(node);
        }, 

        /**
         * Returns the last HTMLElement child that passes the test method. 
         * @method getLastChildBy
         * @param {HTMLElement} node The HTMLElement to use as the starting point 
         * @param {Function} method A boolean function used to test children
         * that receives the node being tested as its only argument
         * @return {Object} HTMLElement or null if not found
         */
        getLastChildBy: function(node, method) {
            if (!node) {
                return null;
            }
            var child = ( testElement(node.lastChild, method) ) ? node.lastChild : null;
            return child || Y.Dom.getPreviousSiblingBy(node.lastChild, method);
        }, 

        /**
         * Returns the last HTMLElement child. 
         * @method getLastChild
         * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point 
         * @return {Object} HTMLElement or null if not found
         */
        getLastChild: function(node) {
            node = Y.Dom.get(node);
            return Y.Dom.getLastChildBy(node);
        }, 

        /**
         * Returns an array of HTMLElement childNodes that pass the test method. 
         * @method getChildrenBy
         * @param {HTMLElement} node The HTMLElement to start from
         * @param {Function} method A boolean function used to test children
         * that receives the node being tested as its only argument
         * @return {Array} A static array of HTMLElements
         */
        getChildrenBy: function(node, method) {
            var child = Y.Dom.getFirstChildBy(node, method);
            var children = child ? [child] : [];

            Y.Dom.getNextSiblingBy(child, function(node) {
                if ( !method || method(node) ) {
                    children[children.length] = node;
                }
                return false; // fail test to collect all children
            });

            return children;
        },
 
        /**
         * Returns an array of HTMLElement childNodes. 
         * @method getChildren
         * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point 
         * @return {Array} A static array of HTMLElements
         */
        getChildren: function(node) {
            node = Y.Dom.get(node);
            if (!node) {
            }

            return Y.Dom.getChildrenBy(node);
        },
 
        /**
         * Returns the left scroll value of the document 
         * @method getDocumentScrollLeft
         * @param {HTMLDocument} document (optional) The document to get the scroll value of
         * @return {Int}  The amount that the document is scrolled to the left
         */
        getDocumentScrollLeft: function(doc) {
            doc = doc || document;
            return Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft);
        }, 

        /**
         * Returns the top scroll value of the document 
         * @method getDocumentScrollTop
         * @param {HTMLDocument} document (optional) The document to get the scroll value of
         * @return {Int}  The amount that the document is scrolled to the top
         */
        getDocumentScrollTop: function(doc) {
            doc = doc || document;
            return Math.max(doc.documentElement.scrollTop, doc.body.scrollTop);
        },

        /**
         * Inserts the new node as the previous sibling of the reference node 
         * @method insertBefore
         * @param {String | HTMLElement} newNode The node to be inserted
         * @param {String | HTMLElement} referenceNode The node to insert the new node before 
         * @return {HTMLElement} The node that was inserted (or null if insert fails) 
         */
        insertBefore: function(newNode, referenceNode) {
            newNode = Y.Dom.get(newNode); 
            referenceNode = Y.Dom.get(referenceNode); 
            
            if (!newNode || !referenceNode || !referenceNode.parentNode) {
                return null;
            }       

            return referenceNode.parentNode.insertBefore(newNode, referenceNode); 
        },

        /**
         * Inserts the new node as the next sibling of the reference node 
         * @method insertAfter
         * @param {String | HTMLElement} newNode The node to be inserted
         * @param {String | HTMLElement} referenceNode The node to insert the new node after 
         * @return {HTMLElement} The node that was inserted (or null if insert fails) 
         */
        insertAfter: function(newNode, referenceNode) {
            newNode = Y.Dom.get(newNode); 
            referenceNode = Y.Dom.get(referenceNode); 
            
            if (!newNode || !referenceNode || !referenceNode.parentNode) {
                return null;
            }       

            if (referenceNode.nextSibling) {
                return referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling); 
            } else {
                return referenceNode.parentNode.appendChild(newNode);
            }
        },

        /**
         * Creates a Region based on the viewport relative to the document. 
         * @method getClientRegion
         * @return {Region} A Region object representing the viewport which accounts for document scroll
         */
        getClientRegion: function() {
            var t = Y.Dom.getDocumentScrollTop(),
                l = Y.Dom.getDocumentScrollLeft(),
                r = Y.Dom.getViewportWidth() + l,
                b = Y.Dom.getViewportHeight() + t;

            return new Y.Region(t, r, b, l);
        }
    };
    
    var getXY = function() {
        if (document.documentElement.getBoundingClientRect) { // IE
            return function(el) {
                var box = el.getBoundingClientRect(),
                    round = Math.round;

                var rootNode = el.ownerDocument;
                return [round(box.left + Y.Dom.getDocumentScrollLeft(rootNode)), round(box.top +
                        Y.Dom.getDocumentScrollTop(rootNode))];
            };
        } else {
            return function(el) { // manually calculate by crawling up offsetParents
                var pos = [el.offsetLeft, el.offsetTop];
                var parentNode = el.offsetParent;

                // safari: subtract body offsets if el is abs (or any offsetParent), unless body is offsetParent
                var accountForBody = (isSafari &&
                        Y.Dom.getStyle(el, 'position') == 'absolute' &&
                        el.offsetParent == el.ownerDocument.body);

                if (parentNode != el) {
                    while (parentNode) {
                        pos[0] += parentNode.offsetLeft;
                        pos[1] += parentNode.offsetTop;
                        if (!accountForBody && isSafari && 
                                Y.Dom.getStyle(parentNode,'position') == 'absolute' ) { 
                            accountForBody = true;
                        }
                        parentNode = parentNode.offsetParent;
                    }
                }

                if (accountForBody) { //safari doubles in this case
                    pos[0] -= el.ownerDocument.body.offsetLeft;
                    pos[1] -= el.ownerDocument.body.offsetTop;
                } 
                parentNode = el.parentNode;

                // account for any scrolled ancestors
                while ( parentNode.tagName && !patterns.ROOT_TAG.test(parentNode.tagName) ) 
                {
                    if (parentNode.scrollTop || parentNode.scrollLeft) {
                        pos[0] -= parentNode.scrollLeft;
                        pos[1] -= parentNode.scrollTop;
                    }
                    
                    parentNode = parentNode.parentNode; 
                }

                return pos;
            };
        }
    }() // NOTE: Executing for loadtime branching
})();
/**
 * A region is a representation of an object on a grid.  It is defined
 * by the top, right, bottom, left extents, so is rectangular by default.  If 
 * other shapes are required, this class could be extended to support it.
 * @namespace YAHOO.util
 * @class Region
 * @param {Int} t the top extent
 * @param {Int} r the right extent
 * @param {Int} b the bottom extent
 * @param {Int} l the left extent
 * @constructor
 */
YAHOO.util.Region = function(t, r, b, l) {

    /**
     * The region's top extent
     * @property top
     * @type Int
     */
    this.top = t;
    
    /**
     * The region's top extent as index, for symmetry with set/getXY
     * @property 1
     * @type Int
     */
    this[1] = t;

    /**
     * The region's right extent
     * @property right
     * @type int
     */
    this.right = r;

    /**
     * The region's bottom extent
     * @property bottom
     * @type Int
     */
    this.bottom = b;

    /**
     * The region's left extent
     * @property left
     * @type Int
     */
    this.left = l;
    
    /**
     * The region's left extent as index, for symmetry with set/getXY
     * @property 0
     * @type Int
     */
    this[0] = l;
};

/**
 * Returns true if this region contains the region passed in
 * @method contains
 * @param  {Region}  region The region to evaluate
 * @return {Boolean}        True if the region is contained with this region, 
 *                          else false
 */
YAHOO.util.Region.prototype.contains = function(region) {
    return ( region.left   >= this.left   && 
             region.right  <= this.right  && 
             region.top    >= this.top    && 
             region.bottom <= this.bottom    );

};

/**
 * Returns the area of the region
 * @method getArea
 * @return {Int} the region's area
 */
YAHOO.util.Region.prototype.getArea = function() {
    return ( (this.bottom - this.top) * (this.right - this.left) );
};

/**
 * Returns the region where the passed in region overlaps with this one
 * @method intersect
 * @param  {Region} region The region that intersects
 * @return {Region}        The overlap region, or null if there is no overlap
 */
YAHOO.util.Region.prototype.intersect = function(region) {
    var t = Math.max( this.top,    region.top    );
    var r = Math.min( this.right,  region.right  );
    var b = Math.min( this.bottom, region.bottom );
    var l = Math.max( this.left,   region.left   );
    
    if (b >= t && r >= l) {
        return new YAHOO.util.Region(t, r, b, l);
    } else {
        return null;
    }
};

/**
 * Returns the region representing the smallest region that can contain both
 * the passed in region and this region.
 * @method union
 * @param  {Region} region The region that to create the union with
 * @return {Region}        The union region
 */
YAHOO.util.Region.prototype.union = function(region) {
    var t = Math.min( this.top,    region.top    );
    var r = Math.max( this.right,  region.right  );
    var b = Math.max( this.bottom, region.bottom );
    var l = Math.min( this.left,   region.left   );

    return new YAHOO.util.Region(t, r, b, l);
};

/**
 * toString
 * @method toString
 * @return string the region properties
 */
YAHOO.util.Region.prototype.toString = function() {
    return ( "Region {"    +
             "top: "       + this.top    + 
             ", right: "   + this.right  + 
             ", bottom: "  + this.bottom + 
             ", left: "    + this.left   + 
             "}" );
};

/**
 * Returns a region that is occupied by the DOM element
 * @method getRegion
 * @param  {HTMLElement} el The element
 * @return {Region}         The region that the element occupies
 * @static
 */
YAHOO.util.Region.getRegion = function(el) {
    var p = YAHOO.util.Dom.getXY(el);

    var t = p[1];
    var r = p[0] + el.offsetWidth;
    var b = p[1] + el.offsetHeight;
    var l = p[0];

    return new YAHOO.util.Region(t, r, b, l);
};

/////////////////////////////////////////////////////////////////////////////


/**
 * A point is a region that is special in that it represents a single point on 
 * the grid.
 * @namespace YAHOO.util
 * @class Point
 * @param {Int} x The X position of the point
 * @param {Int} y The Y position of the point
 * @constructor
 * @extends YAHOO.util.Region
 */
YAHOO.util.Point = function(x, y) {
   if (YAHOO.lang.isArray(x)) { // accept input from Dom.getXY, Event.getXY, etc.
      y = x[1]; // dont blow away x yet
      x = x[0];
   }
   
    /**
     * The X position of the point, which is also the right, left and index zero (for Dom.getXY symmetry)
     * @property x
     * @type Int
     */

    this.x = this.right = this.left = this[0] = x;
     
    /**
     * The Y position of the point, which is also the top, bottom and index one (for Dom.getXY symmetry)
     * @property y
     * @type Int
     */
    this.y = this.top = this.bottom = this[1] = y;
};

YAHOO.util.Point.prototype = new YAHOO.util.Region();

YAHOO.register("dom", YAHOO.util.Dom, {version: "2.6.0", build: "1321"});
/*
Copyright (c) 2008, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.6.0
*/

/**
 * The CustomEvent class lets you define events for your application
 * that can be subscribed to by one or more independent component.
 *
 * @param {String}  type The type of event, which is passed to the callback
 *                  when the event fires
 * @param {Object}  oScope The context the event will fire from.  "this" will
 *                  refer to this object in the callback.  Default value: 
 *                  the window object.  The listener can override this.
 * @param {boolean} silent pass true to prevent the event from writing to
 *                  the debugsystem
 * @param {int}     signature the signature that the custom event subscriber
 *                  will receive. YAHOO.util.CustomEvent.LIST or 
 *                  YAHOO.util.CustomEvent.FLAT.  The default is
 *                  YAHOO.util.CustomEvent.LIST.
 * @namespace YAHOO.util
 * @class CustomEvent
 * @constructor
 */
YAHOO.util.CustomEvent = function(type, oScope, silent, signature) {

    /**
     * The type of event, returned to subscribers when the event fires
     * @property type
     * @type string
     */
    this.type = type;

    /**
     * The scope the the event will fire from by default.  Defaults to the window 
     * obj
     * @property scope
     * @type object
     */
    this.scope = oScope || window;

    /**
     * By default all custom events are logged in the debug build, set silent
     * to true to disable debug outpu for this event.
     * @property silent
     * @type boolean
     */
    this.silent = silent;

    /**
     * Custom events support two styles of arguments provided to the event
     * subscribers.  
     * <ul>
     * <li>YAHOO.util.CustomEvent.LIST: 
     *   <ul>
     *   <li>param1: event name</li>
     *   <li>param2: array of arguments sent to fire</li>
     *   <li>param3: <optional> a custom object supplied by the subscriber</li>
     *   </ul>
     * </li>
     * <li>YAHOO.util.CustomEvent.FLAT
     *   <ul>
     *   <li>param1: the first argument passed to fire.  If you need to
     *           pass multiple parameters, use and array or object literal</li>
     *   <li>param2: <optional> a custom object supplied by the subscriber</li>
     *   </ul>
     * </li>
     * </ul>
     *   @property signature
     *   @type int
     */
    this.signature = signature || YAHOO.util.CustomEvent.LIST;

    /**
     * The subscribers to this event
     * @property subscribers
     * @type Subscriber[]
     */
    this.subscribers = [];

    if (!this.silent) {
    }

    var onsubscribeType = "_YUICEOnSubscribe";

    // Only add subscribe events for events that are not generated by 
    // CustomEvent
    if (type !== onsubscribeType) {

        /**
         * Custom events provide a custom event that fires whenever there is
         * a new subscriber to the event.  This provides an opportunity to
         * handle the case where there is a non-repeating event that has
         * already fired has a new subscriber.  
         *
         * @event subscribeEvent
         * @type YAHOO.util.CustomEvent
         * @param {Function} fn The function to execute
         * @param {Object}   obj An object to be passed along when the event 
         *                       fires
         * @param {boolean|Object}  override If true, the obj passed in becomes 
         *                                   the execution scope of the listener.
         *                                   if an object, that object becomes the
         *                                   the execution scope.
         */
        this.subscribeEvent = 
                new YAHOO.util.CustomEvent(onsubscribeType, this, true);

    } 


    /**
     * In order to make it possible to execute the rest of the subscriber
     * stack when one thows an exception, the subscribers exceptions are
     * caught.  The most recent exception is stored in this property
     * @property lastError
     * @type Error
     */
    this.lastError = null;
};

/**
 * Subscriber listener sigature constant.  The LIST type returns three
 * parameters: the event type, the array of args passed to fire, and
 * the optional custom object
 * @property YAHOO.util.CustomEvent.LIST
 * @static
 * @type int
 */
YAHOO.util.CustomEvent.LIST = 0;

/**
 * Subscriber listener sigature constant.  The FLAT type returns two
 * parameters: the first argument passed to fire and the optional 
 * custom object
 * @property YAHOO.util.CustomEvent.FLAT
 * @static
 * @type int
 */
YAHOO.util.CustomEvent.FLAT = 1;

YAHOO.util.CustomEvent.prototype = {

    /**
     * Subscribes the caller to this event
     * @method subscribe
     * @param {Function} fn        The function to execute
     * @param {Object}   obj       An object to be passed along when the event 
     *                             fires
     * @param {boolean|Object}  override If true, the obj passed in becomes 
     *                                   the execution scope of the listener.
     *                                   if an object, that object becomes the
     *                                   the execution scope.
     */
    subscribe: function(fn, obj, override) {

        if (!fn) {
throw new Error("Invalid callback for subscriber to '" + this.type + "'");
        }

        if (this.subscribeEvent) {
            this.subscribeEvent.fire(fn, obj, override);
        }

        this.subscribers.push( new YAHOO.util.Subscriber(fn, obj, override) );
    },

    /**
     * Unsubscribes subscribers.
     * @method unsubscribe
     * @param {Function} fn  The subscribed function to remove, if not supplied
     *                       all will be removed
     * @param {Object}   obj  The custom object passed to subscribe.  This is
     *                        optional, but if supplied will be used to
     *                        disambiguate multiple listeners that are the same
     *                        (e.g., you subscribe many object using a function
     *                        that lives on the prototype)
     * @return {boolean} True if the subscriber was found and detached.
     */
    unsubscribe: function(fn, obj) {

        if (!fn) {
            return this.unsubscribeAll();
        }

        var found = false;
        for (var i=0, len=this.subscribers.length; i<len; ++i) {
            var s = this.subscribers[i];
            if (s && s.contains(fn, obj)) {
                this._delete(i);
                found = true;
            }
        }

        return found;
    },

    /**
     * Notifies the subscribers.  The callback functions will be executed
     * from the scope specified when the event was created, and with the 
     * following parameters:
     *   <ul>
     *   <li>The type of event</li>
     *   <li>All of the arguments fire() was executed with as an array</li>
     *   <li>The custom object (if any) that was passed into the subscribe() 
     *       method</li>
     *   </ul>
     * @method fire 
     * @param {Object*} arguments an arbitrary set of parameters to pass to 
     *                            the handler.
     * @return {boolean} false if one of the subscribers returned false, 
     *                   true otherwise
     */
    fire: function() {

        this.lastError = null;

        var errors = [],
            len=this.subscribers.length;

        if (!len && this.silent) {
            return true;
        }

        var args=[].slice.call(arguments, 0), ret=true, i, rebuild=false;

        if (!this.silent) {
        }

        // make a copy of the subscribers so that there are
        // no index problems if one subscriber removes another.
        var subs = this.subscribers.slice(), throwErrors = YAHOO.util.Event.throwErrors;

        for (i=0; i<len; ++i) {
            var s = subs[i];
            if (!s) {
                rebuild=true;
            } else {
                if (!this.silent) {
                }

                var scope = s.getScope(this.scope);

                if (this.signature == YAHOO.util.CustomEvent.FLAT) {
                    var param = null;
                    if (args.length > 0) {
                        param = args[0];
                    }

                    try {
                        ret = s.fn.call(scope, param, s.obj);
                    } catch(e) {
                        this.lastError = e;
                        // errors.push(e);
                        if (throwErrors) {
                            throw e;
                        }
                    }
                } else {
                    try {
                        ret = s.fn.call(scope, this.type, args, s.obj);
                    } catch(ex) {
                        this.lastError = ex;
                        if (throwErrors) {
                            throw ex;
                        }
                    }
                }

                if (false === ret) {
                    if (!this.silent) {
                    }

                    break;
                    // return false;
                }
            }
        }

        return (ret !== false);
    },

    /**
     * Removes all listeners
     * @method unsubscribeAll
     * @return {int} The number of listeners unsubscribed
     */
    unsubscribeAll: function() {
        for (var i=this.subscribers.length-1; i>-1; i--) {
            this._delete(i);
        }

        this.subscribers=[];

        return i;
    },

    /**
     * @method _delete
     * @private
     */
    _delete: function(index) {
        var s = this.subscribers[index];
        if (s) {
            delete s.fn;
            delete s.obj;
        }

        // this.subscribers[index]=null;
        this.subscribers.splice(index, 1);
    },

    /**
     * @method toString
     */
    toString: function() {
         return "CustomEvent: " + "'" + this.type  + "', " + 
             "scope: " + this.scope;

    }
};

/////////////////////////////////////////////////////////////////////

/**
 * Stores the subscriber information to be used when the event fires.
 * @param {Function} fn       The function to execute
 * @param {Object}   obj      An object to be passed along when the event fires
 * @param {boolean}  override If true, the obj passed in becomes the execution
 *                            scope of the listener
 * @class Subscriber
 * @constructor
 */
YAHOO.util.Subscriber = function(fn, obj, override) {

    /**
     * The callback that will be execute when the event fires
     * @property fn
     * @type function
     */
    this.fn = fn;

    /**
     * An optional custom object that will passed to the callback when
     * the event fires
     * @property obj
     * @type object
     */
    this.obj = YAHOO.lang.isUndefined(obj) ? null : obj;

    /**
     * The default execution scope for the event listener is defined when the
     * event is created (usually the object which contains the event).
     * By setting override to true, the execution scope becomes the custom
     * object passed in by the subscriber.  If override is an object, that 
     * object becomes the scope.
     * @property override
     * @type boolean|object
     */
    this.override = override;

};

/**
 * Returns the execution scope for this listener.  If override was set to true
 * the custom obj will be the scope.  If override is an object, that is the
 * scope, otherwise the default scope will be used.
 * @method getScope
 * @param {Object} defaultScope the scope to use if this listener does not
 *                              override it.
 */
YAHOO.util.Subscriber.prototype.getScope = function(defaultScope) {
    if (this.override) {
        if (this.override === true) {
            return this.obj;
        } else {
            return this.override;
        }
    }
    return defaultScope;
};

/**
 * Returns true if the fn and obj match this objects properties.
 * Used by the unsubscribe method to match the right subscriber.
 *
 * @method contains
 * @param {Function} fn the function to execute
 * @param {Object} obj an object to be passed along when the event fires
 * @return {boolean} true if the supplied arguments match this 
 *                   subscriber's signature.
 */
YAHOO.util.Subscriber.prototype.contains = function(fn, obj) {
    if (obj) {
        return (this.fn == fn && this.obj == obj);
    } else {
        return (this.fn == fn);
    }
};

/**
 * @method toString
 */
YAHOO.util.Subscriber.prototype.toString = function() {
    return "Subscriber { obj: " + this.obj  + 
           ", override: " +  (this.override || "no") + " }";
};

/**
 * The Event Utility provides utilities for managing DOM Events and tools
 * for building event systems
 *
 * @module event
 * @title Event Utility
 * @namespace YAHOO.util
 * @requires yahoo
 */

// The first instance of Event will win if it is loaded more than once.
// @TODO this needs to be changed so that only the state data that needs to
// be preserved is kept, while methods are overwritten/added as needed.
// This means that the module pattern can't be used.
if (!YAHOO.util.Event) {

/**
 * The event utility provides functions to add and remove event listeners,
 * event cleansing.  It also tries to automatically remove listeners it
 * registers during the unload event.
 *
 * @class Event
 * @static
 */
    YAHOO.util.Event = function() {

        /**
         * True after the onload event has fired
         * @property loadComplete
         * @type boolean
         * @static
         * @private
         */
        var loadComplete =  false;

        /**
         * Cache of wrapped listeners
         * @property listeners
         * @type array
         * @static
         * @private
         */
        var listeners = [];

        /**
         * User-defined unload function that will be fired before all events
         * are detached
         * @property unloadListeners
         * @type array
         * @static
         * @private
         */
        var unloadListeners = [];

        /**
         * Cache of DOM0 event handlers to work around issues with DOM2 events
         * in Safari
         * @property legacyEvents
         * @static
         * @private
         */
        var legacyEvents = [];

        /**
         * Listener stack for DOM0 events
         * @property legacyHandlers
         * @static
         * @private
         */
        var legacyHandlers = [];

        /**
         * The number of times to poll after window.onload.  This number is
         * increased if additional late-bound handlers are requested after
         * the page load.
         * @property retryCount
         * @static
         * @private
         */
        var retryCount = 0;

        /**
         * onAvailable listeners
         * @property onAvailStack
         * @static
         * @private
         */
        var onAvailStack = [];

        /**
         * Lookup table for legacy events
         * @property legacyMap
         * @static
         * @private
         */
        var legacyMap = [];

        /**
         * Counter for auto id generation
         * @property counter
         * @static
         * @private
         */
        var counter = 0;
        
        /**
         * Normalized keycodes for webkit/safari
         * @property webkitKeymap
         * @type {int: int}
         * @private
         * @static
         * @final
         */
        var webkitKeymap = {
            63232: 38, // up
            63233: 40, // down
            63234: 37, // left
            63235: 39, // right
            63276: 33, // page up
            63277: 34, // page down
            25: 9      // SHIFT-TAB (Safari provides a different key code in
                       // this case, even though the shiftKey modifier is set)
        };
        
        // String constants used by the addFocusListener and removeFocusListener methods
        var _FOCUS = YAHOO.env.ua.ie ? "focusin" : "focus";
        var _BLUR = YAHOO.env.ua.ie ? "focusout" : "blur";      

        return {

            /**
             * The number of times we should look for elements that are not
             * in the DOM at the time the event is requested after the document
             * has been loaded.  The default is 2000@amp;20 ms, so it will poll
             * for 40 seconds or until all outstanding handlers are bound
             * (whichever comes first).
             * @property POLL_RETRYS
             * @type int
             * @static
             * @final
             */
            POLL_RETRYS: 2000,

            /**
             * The poll interval in milliseconds
             * @property POLL_INTERVAL
             * @type int
             * @static
             * @final
             */
            POLL_INTERVAL: 20,

            /**
             * Element to bind, int constant
             * @property EL
             * @type int
             * @static
             * @final
             */
            EL: 0,

            /**
             * Type of event, int constant
             * @property TYPE
             * @type int
             * @static
             * @final
             */
            TYPE: 1,

            /**
             * Function to execute, int constant
             * @property FN
             * @type int
             * @static
             * @final
             */
            FN: 2,

            /**
             * Function wrapped for scope correction and cleanup, int constant
             * @property WFN
             * @type int
             * @static
             * @final
             */
            WFN: 3,

            /**
             * Object passed in by the user that will be returned as a 
             * parameter to the callback, int constant.  Specific to
             * unload listeners
             * @property OBJ
             * @type int
             * @static
             * @final
             */
            UNLOAD_OBJ: 3,

            /**
             * Adjusted scope, either the element we are registering the event
             * on or the custom object passed in by the listener, int constant
             * @property ADJ_SCOPE
             * @type int
             * @static
             * @final
             */
            ADJ_SCOPE: 4,

            /**
             * The original obj passed into addListener
             * @property OBJ
             * @type int
             * @static
             * @final
             */
            OBJ: 5,

            /**
             * The original scope parameter passed into addListener
             * @property OVERRIDE
             * @type int
             * @static
             * @final
             */
            OVERRIDE: 6,

            /**
             * The original capture parameter passed into _addListener
             * @property CAPTURE
             * @type int
             * @static
             * @final
             */
            CAPTURE: 7,


            /**
             * addListener/removeListener can throw errors in unexpected scenarios.
             * These errors are suppressed, the method returns false, and this property
             * is set
             * @property lastError
             * @static
             * @type Error
             */
            lastError: null,

            /**
             * Safari detection
             * @property isSafari
             * @private
             * @static
             * @deprecated use YAHOO.env.ua.webkit
             */
            isSafari: YAHOO.env.ua.webkit,
            
            /**
             * webkit version
             * @property webkit
             * @type string
             * @private
             * @static
             * @deprecated use YAHOO.env.ua.webkit
             */
            webkit: YAHOO.env.ua.webkit,
            
            /**
             * IE detection 
             * @property isIE
             * @private
             * @static
             * @deprecated use YAHOO.env.ua.ie
             */
            isIE: YAHOO.env.ua.ie,

            /**
             * poll handle
             * @property _interval
             * @static
             * @private
             */
            _interval: null,

            /**
             * document readystate poll handle
             * @property _dri
             * @static
             * @private
             */
             _dri: null,

            /**
             * True when the document is initially usable
             * @property DOMReady
             * @type boolean
             * @static
             */
            DOMReady: false,

            /**
             * Errors thrown by subscribers of custom events are caught
             * and the error message is written to the debug console.  If
             * this property is set to true, it will also re-throw the
             * error.
             * @property throwErrors
             * @type boolean
             * @default false
             */
            throwErrors: false,

            /**
             * @method startInterval
             * @static
             * @private
             */
            startInterval: function() {
                if (!this._interval) {
                    var self = this;
                    var callback = function() { self._tryPreloadAttach(); };
                    this._interval = setInterval(callback, this.POLL_INTERVAL);
                }
            },

            /**
             * Executes the supplied callback when the item with the supplied
             * id is found.  This is meant to be used to execute behavior as
             * soon as possible as the page loads.  If you use this after the
             * initial page load it will poll for a fixed time for the element.
             * The number of times it will poll and the frequency are
             * configurable.  By default it will poll for 10 seconds.
             *
             * <p>The callback is executed with a single parameter:
             * the custom object parameter, if provided.</p>
             *
             * @method onAvailable
             *
             * @param {string||string[]}   p_id the id of the element, or an array
             * of ids to look for.
             * @param {function} p_fn what to execute when the element is found.
             * @param {object}   p_obj an optional object to be passed back as
             *                   a parameter to p_fn.
             * @param {boolean|object}  p_override If set to true, p_fn will execute
             *                   in the scope of p_obj, if set to an object it
             *                   will execute in the scope of that object
             * @param checkContent {boolean} check child node readiness (onContentReady)
             * @static
             */
            onAvailable: function(p_id, p_fn, p_obj, p_override, checkContent) {

                var a = (YAHOO.lang.isString(p_id)) ? [p_id] : p_id;

                for (var i=0; i<a.length; i=i+1) {
                    onAvailStack.push({id:         a[i], 
                                       fn:         p_fn, 
                                       obj:        p_obj, 
                                       override:   p_override, 
                                       checkReady: checkContent });
                }

                retryCount = this.POLL_RETRYS;

                this.startInterval();
            },

            /**
             * Works the same way as onAvailable, but additionally checks the
             * state of sibling elements to determine if the content of the
             * available element is safe to modify.
             *
             * <p>The callback is executed with a single parameter:
             * the custom object parameter, if provided.</p>
             *
             * @method onContentReady
             *
             * @param {string}   p_id the id of the element to look for.
             * @param {function} p_fn what to execute when the element is ready.
             * @param {object}   p_obj an optional object to be passed back as
             *                   a parameter to p_fn.
             * @param {boolean|object}  p_override If set to true, p_fn will execute
             *                   in the scope of p_obj.  If an object, p_fn will
             *                   exectute in the scope of that object
             *
             * @static
             */
            onContentReady: function(p_id, p_fn, p_obj, p_override) {
                this.onAvailable(p_id, p_fn, p_obj, p_override, true);
            },

            /**
             * Executes the supplied callback when the DOM is first usable.  This
             * will execute immediately if called after the DOMReady event has
             * fired.   @todo the DOMContentReady event does not fire when the
             * script is dynamically injected into the page.  This means the
             * DOMReady custom event will never fire in FireFox or Opera when the
             * library is injected.  It _will_ fire in Safari, and the IE 
             * implementation would allow for us to fire it if the defered script
             * is not available.  We want this to behave the same in all browsers.
             * Is there a way to identify when the script has been injected 
             * instead of included inline?  Is there a way to know whether the 
             * window onload event has fired without having had a listener attached 
             * to it when it did so?
             *
             * <p>The callback is a CustomEvent, so the signature is:</p>
             * <p>type &lt;string&gt;, args &lt;array&gt;, customobject &lt;object&gt;</p>
             * <p>For DOMReady events, there are no fire argments, so the
             * signature is:</p>
             * <p>"DOMReady", [], obj</p>
             *
             *
             * @method onDOMReady
             *
             * @param {function} p_fn what to execute when the element is found.
             * @param {object}   p_obj an optional object to be passed back as
             *                   a parameter to p_fn.
             * @param {boolean|object}  p_scope If set to true, p_fn will execute
             *                   in the scope of p_obj, if set to an object it
             *                   will execute in the scope of that object
             *
             * @static
             */
            onDOMReady: function(p_fn, p_obj, p_override) {
                if (this.DOMReady) {
                    setTimeout(function() {
                        var s = window;
                        if (p_override) {
                            if (p_override === true) {
                                s = p_obj;
                            } else {
                                s = p_override;
                            }
                        }
                        p_fn.call(s, "DOMReady", [], p_obj);
                    }, 0);
                } else {
                    this.DOMReadyEvent.subscribe(p_fn, p_obj, p_override);
                }
            },


            /**
             * Appends an event handler
             *
             * @method _addListener
             *
             * @param {String|HTMLElement|Array|NodeList} el An id, an element 
             *  reference, or a collection of ids and/or elements to assign the 
             *  listener to.
             * @param {String}   sType     The type of event to append
             * @param {Function} fn        The method the event invokes
             * @param {Object}   obj    An arbitrary object that will be 
             *                             passed as a parameter to the handler
             * @param {Boolean|object}  override  If true, the obj passed in becomes
             *                             the execution scope of the listener. If an
             *                             object, this object becomes the execution
             *                             scope.
             * @param {boolen}      capture capture or bubble phase
             * @return {Boolean} True if the action was successful or defered,
             *                        false if one or more of the elements 
             *                        could not have the listener attached,
             *                        or if the operation throws an exception.
             * @private
             * @static
             */
            _addListener: function(el, sType, fn, obj, override, capture) {

                if (!fn || !fn.call) {
                    return false;
                }

                // The el argument can be an array of elements or element ids.
                if ( this._isValidCollection(el)) {
                    var ok = true;
                    for (var i=0,len=el.length; i<len; ++i) {
                        ok = this._addListener(el[i], 
                                       sType, 
                                       fn, 
                                       obj, 
                                       override, 
                                       capture) && ok;
                    }
                    return ok;

                } else if (YAHOO.lang.isString(el)) {
                    var oEl = this.getEl(el);
                    // If the el argument is a string, we assume it is 
                    // actually the id of the element.  If the page is loaded
                    // we convert el to the actual element, otherwise we 
                    // defer attaching the event until onload event fires

                    // check to see if we need to delay hooking up the event 
                    // until after the page loads.
                    if (oEl) {
                        el = oEl;
                    } else {
                        // defer adding the event until the element is available
                        this.onAvailable(el, function() {
                           YAHOO.util.Event._addListener(el, sType, fn, obj, override, capture);
                        });

                        return true;
                    }
                }

                // Element should be an html element or an array if we get 
                // here.
                if (!el) {
                    return false;
                }

                // we need to make sure we fire registered unload events 
                // prior to automatically unhooking them.  So we hang on to 
                // these instead of attaching them to the window and fire the
                // handles explicitly during our one unload event.
                if ("unload" == sType && obj !== this) {
                    unloadListeners[unloadListeners.length] =
                            [el, sType, fn, obj, override, capture];
                    return true;
                }


                // if the user chooses to override the scope, we use the custom
                // object passed in, otherwise the executing scope will be the
                // HTML element that the event is registered on
                var scope = el;
                if (override) {
                    if (override === true) {
                        scope = obj;
                    } else {
                        scope = override;
                    }
                }

                // wrap the function so we can return the obj object when
                // the event fires;
                var wrappedFn = function(e) {
                        return fn.call(scope, YAHOO.util.Event.getEvent(e, el), 
                                obj);
                    };

                var li = [el, sType, fn, wrappedFn, scope, obj, override, capture];
                var index = listeners.length;
                // cache the listener so we can try to automatically unload
                listeners[index] = li;

                if (this.useLegacyEvent(el, sType)) {
                    var legacyIndex = this.getLegacyIndex(el, sType);

                    // Add a new dom0 wrapper if one is not detected for this
                    // element
                    if ( legacyIndex == -1 || 
                                el != legacyEvents[legacyIndex][0] ) {

                        legacyIndex = legacyEvents.length;
                        legacyMap[el.id + sType] = legacyIndex;

                        // cache the signature for the DOM0 event, and 
                        // include the existing handler for the event, if any
                        legacyEvents[legacyIndex] = 
                            [el, sType, el["on" + sType]];
                        legacyHandlers[legacyIndex] = [];

                        el["on" + sType] = 
                            function(e) {
                                YAHOO.util.Event.fireLegacyEvent(
                                    YAHOO.util.Event.getEvent(e), legacyIndex);
                            };
                    }

                    // add a reference to the wrapped listener to our custom
                    // stack of events
                    //legacyHandlers[legacyIndex].push(index);
                    legacyHandlers[legacyIndex].push(li);

                } else {
                    try {
                        this._simpleAdd(el, sType, wrappedFn, capture);
                    } catch(ex) {
                        // handle an error trying to attach an event.  If it fails
                        // we need to clean up the cache
                        this.lastError = ex;
                        this._removeListener(el, sType, fn, capture);
                        return false;
                    }
                }

                return true;
                
            },


            /**
             * Appends an event handler
             *
             * @method addListener
             *
             * @param {String|HTMLElement|Array|NodeList} el An id, an element 
             *  reference, or a collection of ids and/or elements to assign the 
             *  listener to.
             * @param {String}   sType     The type of event to append
             * @param {Function} fn        The method the event invokes
             * @param {Object}   obj    An arbitrary object that will be 
             *                             passed as a parameter to the handler
             * @param {Boolean|object}  override  If true, the obj passed in becomes
             *                             the execution scope of the listener. If an
             *                             object, this object becomes the execution
             *                             scope.
             * @return {Boolean} True if the action was successful or defered,
             *                        false if one or more of the elements 
             *                        could not have the listener attached,
             *                        or if the operation throws an exception.
             * @static
             */
            addListener: function (el, sType, fn, obj, override) {
                return this._addListener(el, sType, fn, obj, override, false);
            },

            /**
             * Appends a focus event handler.  (The focusin event is used for Internet Explorer, 
             * the focus, capture-event for Opera, WebKit, and Gecko.)
             *
             * @method addFocusListener
             *
             * @param {String|HTMLElement|Array|NodeList} el An id, an element 
             *  reference, or a collection of ids and/or elements to assign the 
             *  listener to.
             * @param {Function} fn        The method the event invokes
             * @param {Object}   obj    An arbitrary object that will be 
             *                             passed as a parameter to the handler
             * @param {Boolean|object}  override  If true, the obj passed in becomes
             *                             the execution scope of the listener. If an
             *                             object, this object becomes the execution
             *                             scope.
             * @return {Boolean} True if the action was successful or defered,
             *                        false if one or more of the elements 
             *                        could not have the listener attached,
             *                        or if the operation throws an exception.
             * @static
             */
            addFocusListener: function (el, fn, obj, override) {
                return this._addListener(el, _FOCUS, fn, obj, override, true);
            },          


            /**
             * Removes a focus event listener
             *
             * @method removeFocusListener
             *
             * @param {String|HTMLElement|Array|NodeList} el An id, an element 
             *  reference, or a collection of ids and/or elements to remove
             *  the listener from.
             * @param {Function} fn the method the event invokes.  If fn is
             *  undefined, then all event handlers for the type of event are 
             *  removed.
             * @return {boolean} true if the unbind was successful, false 
             *  otherwise.
             * @static
             */
            removeFocusListener: function (el, fn) { 
                return this._removeListener(el, _FOCUS, fn, true);
            },

            /**
             * Appends a blur event handler.  (The focusout event is used for Internet Explorer, 
             * the focusout, capture-event for Opera, WebKit, and Gecko.)
             *
             * @method addBlurListener
             *
             * @param {String|HTMLElement|Array|NodeList} el An id, an element 
             *  reference, or a collection of ids and/or elements to assign the 
             *  listener to.
             * @param {Function} fn        The method the event invokes
             * @param {Object}   obj    An arbitrary object that will be 
             *                             passed as a parameter to the handler
             * @param {Boolean|object}  override  If true, the obj passed in becomes
             *                             the execution scope of the listener. If an
             *                             object, this object becomes the execution
             *                             scope.
             * @return {Boolean} True if the action was successful or defered,
             *                        false if one or more of the elements 
             *                        could not have the listener attached,
             *                        or if the operation throws an exception.
             * @static
             */
            addBlurListener: function (el, fn, obj, override) {
                return this._addListener(el, _BLUR, fn, obj, override, true);
            },          

            /**
             * Removes a blur event listener
             *
             * @method removeBlurListener
             *
             * @param {String|HTMLElement|Array|NodeList} el An id, an element 
             *  reference, or a collection of ids and/or elements to remove
             *  the listener from.
             * @param {Function} fn the method the event invokes.  If fn is
             *  undefined, then all event handlers for the type of event are 
             *  removed.
             * @return {boolean} true if the unbind was successful, false 
             *  otherwise.
             * @static
             */
            removeBlurListener: function (el, fn) { 
            
                return this._removeListener(el, _BLUR, fn, true);
            
            },

            /**
             * When using legacy events, the handler is routed to this object
             * so we can fire our custom listener stack.
             * @method fireLegacyEvent
             * @static
             * @private
             */
            fireLegacyEvent: function(e, legacyIndex) {
                var ok=true, le, lh, li, scope, ret;
                
                lh = legacyHandlers[legacyIndex].slice();
                for (var i=0, len=lh.length; i<len; ++i) {
                // for (var i in lh.length) {
                    li = lh[i];
                    if ( li && li[this.WFN] ) {
                        scope = li[this.ADJ_SCOPE];
                        ret = li[this.WFN].call(scope, e);
                        ok = (ok && ret);
                    }
                }

                // Fire the original handler if we replaced one.  We fire this
                // after the other events to keep stopPropagation/preventDefault
                // that happened in the DOM0 handler from touching our DOM2
                // substitute
                le = legacyEvents[legacyIndex];
                if (le && le[2]) {
                    le[2](e);
                }
                
                return ok;
            },

            /**
             * Returns the legacy event index that matches the supplied 
             * signature
             * @method getLegacyIndex
             * @static
             * @private
             */
            getLegacyIndex: function(el, sType) {
                var key = this.generateId(el) + sType;
                if (typeof legacyMap[key] == "undefined") { 
                    return -1;
                } else {
                    return legacyMap[key];
                }
            },

            /**
             * Logic that determines when we should automatically use legacy
             * events instead of DOM2 events.  Currently this is limited to old
             * Safari browsers with a broken preventDefault
             * @method useLegacyEvent
             * @static
             * @private
             */
            useLegacyEvent: function(el, sType) {
return (this.webkit && this.webkit < 419 && ("click"==sType || "dblclick"==sType));
            },
                    
            /**
             * Removes an event listener
             *
             * @method _removeListener
             *
             * @param {String|HTMLElement|Array|NodeList} el An id, an element 
             *  reference, or a collection of ids and/or elements to remove
             *  the listener from.
             * @param {String} sType the type of event to remove.
             * @param {Function} fn the method the event invokes.  If fn is
             *  undefined, then all event handlers for the type of event are 
             *  removed.
             * @param {boolen}      capture capture or bubble phase             
             * @return {boolean} true if the unbind was successful, false 
             *  otherwise.
             * @static
             * @private
             */
            _removeListener: function(el, sType, fn, capture) {
                var i, len, li;

                // The el argument can be a string
                if (typeof el == "string") {
                    el = this.getEl(el);
                // The el argument can be an array of elements or element ids.
                } else if ( this._isValidCollection(el)) {
                    var ok = true;
                    for (i=el.length-1; i>-1; i--) {
                        ok = ( this._removeListener(el[i], sType, fn, capture) && ok );
                    }
                    return ok;
                }

                if (!fn || !fn.call) {
                    //return false;
                    return this.purgeElement(el, false, sType);
                }

                if ("unload" == sType) {

                    for (i=unloadListeners.length-1; i>-1; i--) {
                        li = unloadListeners[i];
                        if (li && 
                            li[0] == el && 
                            li[1] == sType && 
                            li[2] == fn) {
                                unloadListeners.splice(i, 1);
                                // unloadListeners[i]=null;
                                return true;
                        }
                    }

                    return false;
                }

                var cacheItem = null;

                // The index is a hidden parameter; needed to remove it from
                // the method signature because it was tempting users to
                // try and take advantage of it, which is not possible.
                var index = arguments[4];
  
                if ("undefined" === typeof index) {
                    index = this._getCacheIndex(el, sType, fn);
                }

                if (index >= 0) {
                    cacheItem = listeners[index];
                }

                if (!el || !cacheItem) {
                    return false;
                }


                if (this.useLegacyEvent(el, sType)) {
                    var legacyIndex = this.getLegacyIndex(el, sType);
                    var llist = legacyHandlers[legacyIndex];
                    if (llist) {
                        for (i=0, len=llist.length; i<len; ++i) {
                        // for (i in llist.length) {
                            li = llist[i];
                            if (li && 
                                li[this.EL] == el && 
                                li[this.TYPE] == sType && 
                                li[this.FN] == fn) {
                                    llist.splice(i, 1);
                                    // llist[i]=null;
                                    break;
                            }
                        }
                    }

                } else {
                    try {
                        this._simpleRemove(el, sType, cacheItem[this.WFN], capture);
                    } catch(ex) {
                        this.lastError = ex;
                        return false;
                    }
                }

                // removed the wrapped handler
                delete listeners[index][this.WFN];
                delete listeners[index][this.FN];
                listeners.splice(index, 1);
                // listeners[index]=null;

                return true;

            },


            /**
             * Removes an event listener
             *
             * @method removeListener
             *
             * @param {String|HTMLElement|Array|NodeList} el An id, an element 
             *  reference, or a collection of ids and/or elements to remove
             *  the listener from.
             * @param {String} sType the type of event to remove.
             * @param {Function} fn the method the event invokes.  If fn is
             *  undefined, then all event handlers for the type of event are 
             *  removed.
             * @return {boolean} true if the unbind was successful, false 
             *  otherwise.
             * @static
             */
            removeListener: function(el, sType, fn) {

				return this._removeListener(el, sType, fn, false);

            },


            /**
             * Returns the event's target element.  Safari sometimes provides
             * a text node, and this is automatically resolved to the text
             * node's parent so that it behaves like other browsers.
             * @method getTarget
             * @param {Event} ev the event
             * @param {boolean} resolveTextNode when set to true the target's
             *                  parent will be returned if the target is a 
             *                  text node.  @deprecated, the text node is
             *                  now resolved automatically
             * @return {HTMLElement} the event's target
             * @static
             */
            getTarget: function(ev, resolveTextNode) {
                var t = ev.target || ev.srcElement;
                return this.resolveTextNode(t);
            },

            /**
             * In some cases, some browsers will return a text node inside
             * the actual element that was targeted.  This normalizes the
             * return value for getTarget and getRelatedTarget.
             * @method resolveTextNode
             * @param {HTMLElement} node node to resolve
             * @return {HTMLElement} the normized node
             * @static
             */
            resolveTextNode: function(n) {
                try {
                    if (n && 3 == n.nodeType) {
                        return n.parentNode;
                    }
                } catch(e) { }

                return n;
            },

            /**
             * Returns the event's pageX
             * @method getPageX
             * @param {Event} ev the event
             * @return {int} the event's pageX
             * @static
             */
            getPageX: function(ev) {
                var x = ev.pageX;
                if (!x && 0 !== x) {
                    x = ev.clientX || 0;

                    if ( this.isIE ) {
                        x += this._getScrollLeft();
                    }
                }

                return x;
            },

            /**
             * Returns the event's pageY
             * @method getPageY
             * @param {Event} ev the event
             * @return {int} the event's pageY
             * @static
             */
            getPageY: function(ev) {
                var y = ev.pageY;
                if (!y && 0 !== y) {
                    y = ev.clientY || 0;

                    if ( this.isIE ) {
                        y += this._getScrollTop();
                    }
                }


                return y;
            },

            /**
             * Returns the pageX and pageY properties as an indexed array.
             * @method getXY
             * @param {Event} ev the event
             * @return {[x, y]} the pageX and pageY properties of the event
             * @static
             */
            getXY: function(ev) {
                return [this.getPageX(ev), this.getPageY(ev)];
            },

            /**
             * Returns the event's related target 
             * @method getRelatedTarget
             * @param {Event} ev the event
             * @return {HTMLElement} the event's relatedTarget
             * @static
             */
            getRelatedTarget: function(ev) {
                var t = ev.relatedTarget;
                if (!t) {
                    if (ev.type == "mouseout") {
                        t = ev.toElement;
                    } else if (ev.type == "mouseover") {
                        t = ev.fromElement;
                    }
                }

                return this.resolveTextNode(t);
            },

            /**
             * Returns the time of the event.  If the time is not included, the
             * event is modified using the current time.
             * @method getTime
             * @param {Event} ev the event
             * @return {Date} the time of the event
             * @static
             */
            getTime: function(ev) {
                if (!ev.time) {
                    var t = new Date().getTime();
                    try {
                        ev.time = t;
                    } catch(ex) { 
                        this.lastError = ex;
                        return t;
                    }
                }

                return ev.time;
            },

            /**
             * Convenience method for stopPropagation + preventDefault
             * @method stopEvent
             * @param {Event} ev the event
             * @static
             */
            stopEvent: function(ev) {
                this.stopPropagation(ev);
                this.preventDefault(ev);
            },

            /**
             * Stops event propagation
             * @method stopPropagation
             * @param {Event} ev the event
             * @static
             */
            stopPropagation: function(ev) {
                if (ev.stopPropagation) {
                    ev.stopPropagation();
                } else {
                    ev.cancelBubble = true;
                }
            },

            /**
             * Prevents the default behavior of the event
             * @method preventDefault
             * @param {Event} ev the event
             * @static
             */
            preventDefault: function(ev) {
                if (ev.preventDefault) {
                    ev.preventDefault();
                } else {
                    ev.returnValue = false;
                }
            },
             
            /**
             * Finds the event in the window object, the caller's arguments, or
             * in the arguments of another method in the callstack.  This is
             * executed automatically for events registered through the event
             * manager, so the implementer should not normally need to execute
             * this function at all.
             * @method getEvent
             * @param {Event} e the event parameter from the handler
             * @param {HTMLElement} boundEl the element the listener is attached to
             * @return {Event} the event 
             * @static
             */
            getEvent: function(e, boundEl) {
                var ev = e || window.event;

                if (!ev) {
                    var c = this.getEvent.caller;
                    while (c) {
                        ev = c.arguments[0];
                        if (ev && Event == ev.constructor) {
                            break;
                        }
                        c = c.caller;
                    }
                }

                return ev;
            },

            /**
             * Returns the charcode for an event
             * @method getCharCode
             * @param {Event} ev the event
             * @return {int} the event's charCode
             * @static
             */
            getCharCode: function(ev) {
                var code = ev.keyCode || ev.charCode || 0;

                // webkit key normalization
                if (YAHOO.env.ua.webkit && (code in webkitKeymap)) {
                    code = webkitKeymap[code];
                }
                return code;
            },

            /**
             * Locating the saved event handler data by function ref
             *
             * @method _getCacheIndex
             * @static
             * @private
             */
            _getCacheIndex: function(el, sType, fn) {
                for (var i=0, l=listeners.length; i<l; i=i+1) {
                    var li = listeners[i];
                    if ( li                 && 
                         li[this.FN] == fn  && 
                         li[this.EL] == el  && 
                         li[this.TYPE] == sType ) {
                        return i;
                    }
                }

                return -1;
            },

            /**
             * Generates an unique ID for the element if it does not already 
             * have one.
             * @method generateId
             * @param el the element to create the id for
             * @return {string} the resulting id of the element
             * @static
             */
            generateId: function(el) {
                var id = el.id;

                if (!id) {
                    id = "yuievtautoid-" + counter;
                    ++counter;
                    el.id = id;
                }

                return id;
            },


            /**
             * We want to be able to use getElementsByTagName as a collection
             * to attach a group of events to.  Unfortunately, different 
             * browsers return different types of collections.  This function
             * tests to determine if the object is array-like.  It will also 
             * fail if the object is an array, but is empty.
             * @method _isValidCollection
             * @param o the object to test
             * @return {boolean} true if the object is array-like and populated
             * @static
             * @private
             */
            _isValidCollection: function(o) {
                try {
                    return ( o                     && // o is something
                             typeof o !== "string" && // o is not a string
                             o.length              && // o is indexed
                             !o.tagName            && // o is not an HTML element
                             !o.alert              && // o is not a window
                             typeof o[0] !== "undefined" );
                } catch(ex) {
                    return false;
                }

            },

            /**
             * @private
             * @property elCache
             * DOM element cache
             * @static
             * @deprecated Elements are not cached due to issues that arise when
             * elements are removed and re-added
             */
            elCache: {},

            /**
             * We cache elements bound by id because when the unload event 
             * fires, we can no longer use document.getElementById
             * @method getEl
             * @static
             * @private
             * @deprecated Elements are not cached any longer
             */
            getEl: function(id) {
                return (typeof id === "string") ? document.getElementById(id) : id;
            },

            /**
             * Clears the element cache
             * @deprecated Elements are not cached any longer
             * @method clearCache
             * @static
             * @private
             */
            clearCache: function() { },

            /**
             * Custom event the fires when the dom is initially usable
             * @event DOMReadyEvent
             */
            DOMReadyEvent: new YAHOO.util.CustomEvent("DOMReady", this),

            /**
             * hook up any deferred listeners
             * @method _load
             * @static
             * @private
             */
            _load: function(e) {

                if (!loadComplete) {
                    loadComplete = true;
                    var EU = YAHOO.util.Event;

                    // Just in case DOMReady did not go off for some reason
                    EU._ready();

                    // Available elements may not have been detected before the
                    // window load event fires. Try to find them now so that the
                    // the user is more likely to get the onAvailable notifications
                    // before the window load notification
                    EU._tryPreloadAttach();

                }
            },

            /**
             * Fires the DOMReady event listeners the first time the document is
             * usable.
             * @method _ready
             * @static
             * @private
             */
            _ready: function(e) {
                var EU = YAHOO.util.Event;
                if (!EU.DOMReady) {
                    EU.DOMReady=true;

                    // Fire the content ready custom event
                    EU.DOMReadyEvent.fire();

                    // Remove the DOMContentLoaded (FF/Opera)
                    EU._simpleRemove(document, "DOMContentLoaded", EU._ready);
                }
            },

            /**
             * Polling function that runs before the onload event fires, 
             * attempting to attach to DOM Nodes as soon as they are 
             * available
             * @method _tryPreloadAttach
             * @static
             * @private
             */
            _tryPreloadAttach: function() {

                if (onAvailStack.length === 0) {
                    retryCount = 0;
                    clearInterval(this._interval);
                    this._interval = null;
                    return;
                }

                if (this.locked) {
                    return;
                }

                if (this.isIE) {
                    // Hold off if DOMReady has not fired and check current
                    // readyState to protect against the IE operation aborted
                    // issue.
                    if (!this.DOMReady) {
                        this.startInterval();
                        return;
                    }
                }

                this.locked = true;


                // keep trying until after the page is loaded.  We need to 
                // check the page load state prior to trying to bind the 
                // elements so that we can be certain all elements have been 
                // tested appropriately
                var tryAgain = !loadComplete;
                if (!tryAgain) {
                    tryAgain = (retryCount > 0 && onAvailStack.length > 0);
                }

                // onAvailable
                var notAvail = [];

                var executeItem = function (el, item) {
                    var scope = el;
                    if (item.override) {
                        if (item.override === true) {
                            scope = item.obj;
                        } else {
                            scope = item.override;
                        }
                    }
                    item.fn.call(scope, item.obj);
                };

                var i, len, item, el, ready=[];

                // onAvailable onContentReady
                for (i=0, len=onAvailStack.length; i<len; i=i+1) {
                    item = onAvailStack[i];
                    if (item) {
                        el = this.getEl(item.id);
                        if (el) {
                            if (item.checkReady) {
                                if (loadComplete || el.nextSibling || !tryAgain) {
                                    ready.push(item);
                                    onAvailStack[i] = null;
                                }
                            } else {
                                executeItem(el, item);
                                onAvailStack[i] = null;
                            }
                        } else {
                            notAvail.push(item);
                        }
                    }
                }
                
                // make sure onContentReady fires after onAvailable
                for (i=0, len=ready.length; i<len; i=i+1) {
                    item = ready[i];
                    executeItem(this.getEl(item.id), item);
                }


                retryCount--;

                if (tryAgain) {
                    for (i=onAvailStack.length-1; i>-1; i--) {
                        item = onAvailStack[i];
                        if (!item || !item.id) {
                            onAvailStack.splice(i, 1);
                        }
                    }

                    this.startInterval();
                } else {
                    clearInterval(this._interval);
                    this._interval = null;
                }

                this.locked = false;

            },

            /**
             * Removes all listeners attached to the given element via addListener.
             * Optionally, the node's children can also be purged.
             * Optionally, you can specify a specific type of event to remove.
             * @method purgeElement
             * @param {HTMLElement} el the element to purge
             * @param {boolean} recurse recursively purge this element's children
             * as well.  Use with caution.
             * @param {string} sType optional type of listener to purge. If
             * left out, all listeners will be removed
             * @static
             */
            purgeElement: function(el, recurse, sType) {
                var oEl = (YAHOO.lang.isString(el)) ? this.getEl(el) : el;
                var elListeners = this.getListeners(oEl, sType), i, len;
                if (elListeners) {
                    for (i=elListeners.length-1; i>-1; i--) {
                        var l = elListeners[i];
                        this._removeListener(oEl, l.type, l.fn, l.capture);
                    }
                }

                if (recurse && oEl && oEl.childNodes) {
                    for (i=0,len=oEl.childNodes.length; i<len ; ++i) {
                        this.purgeElement(oEl.childNodes[i], recurse, sType);
                    }
                }
            },

            /**
             * Returns all listeners attached to the given element via addListener.
             * Optionally, you can specify a specific type of event to return.
             * @method getListeners
             * @param el {HTMLElement|string} the element or element id to inspect 
             * @param sType {string} optional type of listener to return. If
             * left out, all listeners will be returned
             * @return {Object} the listener. Contains the following fields:
             * &nbsp;&nbsp;type:   (string)   the type of event
             * &nbsp;&nbsp;fn:     (function) the callback supplied to addListener
             * &nbsp;&nbsp;obj:    (object)   the custom object supplied to addListener
             * &nbsp;&nbsp;adjust: (boolean|object)  whether or not to adjust the default scope
             * &nbsp;&nbsp;scope: (boolean)  the derived scope based on the adjust parameter
             * &nbsp;&nbsp;scope: (capture)  the capture parameter supplied to addListener
             * &nbsp;&nbsp;index:  (int)      its position in the Event util listener cache
             * @static
             */           
            getListeners: function(el, sType) {
                var results=[], searchLists;
                if (!sType) {
                    searchLists = [listeners, unloadListeners];
                } else if (sType === "unload") {
                    searchLists = [unloadListeners];
                } else {
                    searchLists = [listeners];
                }

                var oEl = (YAHOO.lang.isString(el)) ? this.getEl(el) : el;

                for (var j=0;j<searchLists.length; j=j+1) {
                    var searchList = searchLists[j];
                    if (searchList) {
                        for (var i=0,len=searchList.length; i<len ; ++i) {
                            var l = searchList[i];
                            if ( l  && l[this.EL] === oEl && 
                                    (!sType || sType === l[this.TYPE]) ) {
                                results.push({
                                    type:   l[this.TYPE],
                                    fn:     l[this.FN],
                                    obj:    l[this.OBJ],
                                    adjust: l[this.OVERRIDE],
                                    scope:  l[this.ADJ_SCOPE],
                                    capture:  l[this.CAPTURE],                                    
                                    index:  i
                                });
                            }
                        }
                    }
                }

                return (results.length) ? results : null;
            },

            /**
             * Removes all listeners registered by pe.event.  Called 
             * automatically during the unload event.
             * @method _unload
             * @static
             * @private
             */
            _unload: function(e) {

                var EU = YAHOO.util.Event, i, j, l, len, index,
                         ul = unloadListeners.slice();

                // execute and clear stored unload listeners
                for (i=0,len=unloadListeners.length; i<len; ++i) {
                    l = ul[i];
                    if (l) {
                        var scope = window;
                        if (l[EU.ADJ_SCOPE]) {
                            if (l[EU.ADJ_SCOPE] === true) {
                                scope = l[EU.UNLOAD_OBJ];
                            } else {
                                scope = l[EU.ADJ_SCOPE];
                            }
                        }
                        l[EU.FN].call(scope, EU.getEvent(e, l[EU.EL]), l[EU.UNLOAD_OBJ] );
                        ul[i] = null;
                        l=null;
                        scope=null;
                    }
                }

                unloadListeners = null;

                // Remove listeners to handle IE memory leaks
                //if (YAHOO.env.ua.ie && listeners && listeners.length > 0) {
                
                // 2.5.0 listeners are removed for all browsers again.  FireFox preserves
                // at least some listeners between page refreshes, potentially causing
                // errors during page load (mouseover listeners firing before they
                // should if the user moves the mouse at the correct moment).
                if (listeners) {
                    for (j=listeners.length-1; j>-1; j--) {
                        l = listeners[j];
                        if (l) {
                            EU._removeListener(l[EU.EL], l[EU.TYPE], l[EU.FN], l[EU.CAPTURE], j);
                        } 
                    }
                    l=null;
                }

                legacyEvents = null;

                EU._simpleRemove(window, "unload", EU._unload);

            },

            /**
             * Returns scrollLeft
             * @method _getScrollLeft
             * @static
             * @private
             */
            _getScrollLeft: function() {
                return this._getScroll()[1];
            },

            /**
             * Returns scrollTop
             * @method _getScrollTop
             * @static
             * @private
             */
            _getScrollTop: function() {
                return this._getScroll()[0];
            },

            /**
             * Returns the scrollTop and scrollLeft.  Used to calculate the 
             * pageX and pageY in Internet Explorer
             * @method _getScroll
             * @static
             * @private
             */
            _getScroll: function() {
                var dd = document.documentElement, db = document.body;
                if (dd && (dd.scrollTop || dd.scrollLeft)) {
                    return [dd.scrollTop, dd.scrollLeft];
                } else if (db) {
                    return [db.scrollTop, db.scrollLeft];
                } else {
                    return [0, 0];
                }
            },
            
            /**
             * Used by old versions of CustomEvent, restored for backwards
             * compatibility
             * @method regCE
             * @private
             * @static
             * @deprecated still here for backwards compatibility
             */
            regCE: function() {
                // does nothing
            },

            /**
             * Adds a DOM event directly without the caching, cleanup, scope adj, etc
             *
             * @method _simpleAdd
             * @param {HTMLElement} el      the element to bind the handler to
             * @param {string}      sType   the type of event handler
             * @param {function}    fn      the callback to invoke
             * @param {boolen}      capture capture or bubble phase
             * @static
             * @private
             */
            _simpleAdd: function () {
                if (window.addEventListener) {
                    return function(el, sType, fn, capture) {
                        el.addEventListener(sType, fn, (capture));
                    };
                } else if (window.attachEvent) {
                    return function(el, sType, fn, capture) {
                        el.attachEvent("on" + sType, fn);
                    };
                } else {
                    return function(){};
                }
            }(),

            /**
             * Basic remove listener
             *
             * @method _simpleRemove
             * @param {HTMLElement} el      the element to bind the handler to
             * @param {string}      sType   the type of event handler
             * @param {function}    fn      the callback to invoke
             * @param {boolen}      capture capture or bubble phase
             * @static
             * @private
             */
            _simpleRemove: function() {
                if (window.removeEventListener) {
                    return function (el, sType, fn, capture) {
                        el.removeEventListener(sType, fn, (capture));
                    };
                } else if (window.detachEvent) {
                    return function (el, sType, fn) {
                        el.detachEvent("on" + sType, fn);
                    };
                } else {
                    return function(){};
                }
            }()
        };

    }();

    (function() {
        var EU = YAHOO.util.Event;

        /**
         * YAHOO.util.Event.on is an alias for addListener
         * @method on
         * @see addListener
         * @static
         */
        EU.on = EU.addListener;

        /**
         * YAHOO.util.Event.onFocus is an alias for addFocusListener
         * @method on
         * @see addFocusListener
         * @static
         */
        EU.onFocus = EU.addFocusListener;

        /**
         * YAHOO.util.Event.onBlur is an alias for addBlurListener
         * @method onBlur
         * @see addBlurListener
         * @static
         */     
        EU.onBlur = EU.addBlurListener;


/*! DOMReady: based on work by: Dean Edwards/John Resig/Matthias Miller */

        // Internet Explorer: use the readyState of a defered script.
        // This isolates what appears to be a safe moment to manipulate
        // the DOM prior to when the document's readyState suggests
        // it is safe to do so.
        if (EU.isIE) {

            // Process onAvailable/onContentReady items when the 
            // DOM is ready.
            YAHOO.util.Event.onDOMReady(
                    YAHOO.util.Event._tryPreloadAttach,
                    YAHOO.util.Event, true);
            
            var n = document.createElement('p');  

            EU._dri = setInterval(function() {
                try {
                    // throws an error if doc is not ready
                    n.doScroll('left');
                    clearInterval(EU._dri);
                    EU._dri = null;
                    EU._ready();
                    n = null;
                } catch (ex) { 
                }
            }, EU.POLL_INTERVAL); 

        
        // The document's readyState in Safari currently will
        // change to loaded/complete before images are loaded.
        } else if (EU.webkit && EU.webkit < 525) {

            EU._dri = setInterval(function() {
                var rs=document.readyState;
                if ("loaded" == rs || "complete" == rs) {
                    clearInterval(EU._dri);
                    EU._dri = null;
                    EU._ready();
                }
            }, EU.POLL_INTERVAL); 

        // FireFox and Opera: These browsers provide a event for this
        // moment.  The latest WebKit releases now support this event.
        } else {

            EU._simpleAdd(document, "DOMContentLoaded", EU._ready);

        }
        /////////////////////////////////////////////////////////////


        EU._simpleAdd(window, "load", EU._load);
        EU._simpleAdd(window, "unload", EU._unload);
        EU._tryPreloadAttach();
    })();

}
/**
 * EventProvider is designed to be used with YAHOO.augment to wrap 
 * CustomEvents in an interface that allows events to be subscribed to 
 * and fired by name.  This makes it possible for implementing code to
 * subscribe to an event that either has not been created yet, or will
 * not be created at all.
 *
 * @Class EventProvider
 */
YAHOO.util.EventProvider = function() { };

YAHOO.util.EventProvider.prototype = {

    /**
     * Private storage of custom events
     * @property __yui_events
     * @type Object[]
     * @private
     */
    __yui_events: null,

    /**
     * Private storage of custom event subscribers
     * @property __yui_subscribers
     * @type Object[]
     * @private
     */
    __yui_subscribers: null,
    
    /**
     * Subscribe to a CustomEvent by event type
     *
     * @method subscribe
     * @param p_type     {string}   the type, or name of the event
     * @param p_fn       {function} the function to exectute when the event fires
     * @param p_obj      {Object}   An object to be passed along when the event 
     *                              fires
     * @param p_override {boolean}  If true, the obj passed in becomes the 
     *                              execution scope of the listener
     */
    subscribe: function(p_type, p_fn, p_obj, p_override) {

        this.__yui_events = this.__yui_events || {};
        var ce = this.__yui_events[p_type];

        if (ce) {
            ce.subscribe(p_fn, p_obj, p_override);
        } else {
            this.__yui_subscribers = this.__yui_subscribers || {};
            var subs = this.__yui_subscribers;
            if (!subs[p_type]) {
                subs[p_type] = [];
            }
            subs[p_type].push(
                { fn: p_fn, obj: p_obj, override: p_override } );
        }
    },

    /**
     * Unsubscribes one or more listeners the from the specified event
     * @method unsubscribe
     * @param p_type {string}   The type, or name of the event.  If the type
     *                          is not specified, it will attempt to remove
     *                          the listener from all hosted events.
     * @param p_fn   {Function} The subscribed function to unsubscribe, if not
     *                          supplied, all subscribers will be removed.
     * @param p_obj  {Object}   The custom object passed to subscribe.  This is
     *                        optional, but if supplied will be used to
     *                        disambiguate multiple listeners that are the same
     *                        (e.g., you subscribe many object using a function
     *                        that lives on the prototype)
     * @return {boolean} true if the subscriber was found and detached.
     */
    unsubscribe: function(p_type, p_fn, p_obj) {
        this.__yui_events = this.__yui_events || {};
        var evts = this.__yui_events;
        if (p_type) {
            var ce = evts[p_type];
            if (ce) {
                return ce.unsubscribe(p_fn, p_obj);
            }
        } else {
            var ret = true;
            for (var i in evts) {
                if (YAHOO.lang.hasOwnProperty(evts, i)) {
                    ret = ret && evts[i].unsubscribe(p_fn, p_obj);
                }
            }
            return ret;
        }

        return false;
    },
    
    /**
     * Removes all listeners from the specified event.  If the event type
     * is not specified, all listeners from all hosted custom events will
     * be removed.
     * @method unsubscribeAll
     * @param p_type {string}   The type, or name of the event
     */
    unsubscribeAll: function(p_type) {
        return this.unsubscribe(p_type);
    },

    /**
     * Creates a new custom event of the specified type.  If a custom event
     * by that name already exists, it will not be re-created.  In either
     * case the custom event is returned. 
     *
     * @method createEvent
     *
     * @param p_type {string} the type, or name of the event
     * @param p_config {object} optional config params.  Valid properties are:
     *
     *  <ul>
     *    <li>
     *      scope: defines the default execution scope.  If not defined
     *      the default scope will be this instance.
     *    </li>
     *    <li>
     *      silent: if true, the custom event will not generate log messages.
     *      This is false by default.
     *    </li>
     *    <li>
     *      onSubscribeCallback: specifies a callback to execute when the
     *      event has a new subscriber.  This will fire immediately for
     *      each queued subscriber if any exist prior to the creation of
     *      the event.
     *    </li>
     *  </ul>
     *
     *  @return {CustomEvent} the custom event
     *
     */
    createEvent: function(p_type, p_config) {

        this.__yui_events = this.__yui_events || {};
        var opts = p_config || {};
        var events = this.__yui_events;

        if (events[p_type]) {
        } else {

            var scope  = opts.scope  || this;
            var silent = (opts.silent);

            var ce = new YAHOO.util.CustomEvent(p_type, scope, silent,
                    YAHOO.util.CustomEvent.FLAT);
            events[p_type] = ce;

            if (opts.onSubscribeCallback) {
                ce.subscribeEvent.subscribe(opts.onSubscribeCallback);
            }

            this.__yui_subscribers = this.__yui_subscribers || {};
            var qs = this.__yui_subscribers[p_type];

            if (qs) {
                for (var i=0; i<qs.length; ++i) {
                    ce.subscribe(qs[i].fn, qs[i].obj, qs[i].override);
                }
            }
        }

        return events[p_type];
    },


   /**
     * Fire a custom event by name.  The callback functions will be executed
     * from the scope specified when the event was created, and with the 
     * following parameters:
     *   <ul>
     *   <li>The first argument fire() was executed with</li>
     *   <li>The custom object (if any) that was passed into the subscribe() 
     *       method</li>
     *   </ul>
     * @method fireEvent
     * @param p_type    {string}  the type, or name of the event
     * @param arguments {Object*} an arbitrary set of parameters to pass to 
     *                            the handler.
     * @return {boolean} the return value from CustomEvent.fire
     *                   
     */
    fireEvent: function(p_type, arg1, arg2, etc) {

        this.__yui_events = this.__yui_events || {};
        var ce = this.__yui_events[p_type];

        if (!ce) {
            return null;
        }

        var args = [];
        for (var i=1; i<arguments.length; ++i) {
            args.push(arguments[i]);
        }
        return ce.fire.apply(ce, args);
    },

    /**
     * Returns true if the custom event of the provided type has been created
     * with createEvent.
     * @method hasEvent
     * @param type {string} the type, or name of the event
     */
    hasEvent: function(type) {
        if (this.__yui_events) {
            if (this.__yui_events[type]) {
                return true;
            }
        }
        return false;
    }

};

//@TODO optimize
//@TODO use event utility, lang abstractions
//@TODO replace

/**
* KeyListener is a utility that provides an easy interface for listening for
* keydown/keyup events fired against DOM elements.
* @namespace YAHOO.util
* @class KeyListener
* @constructor
* @param {HTMLElement} attachTo The element or element ID to which the key 
*                               event should be attached
* @param {String}      attachTo The element or element ID to which the key
*                               event should be attached
* @param {Object}      keyData  The object literal representing the key(s) 
*                               to detect. Possible attributes are 
*                               shift(boolean), alt(boolean), ctrl(boolean) 
*                               and keys(either an int or an array of ints 
*                               representing keycodes).
* @param {Function}    handler  The CustomEvent handler to fire when the 
*                               key event is detected
* @param {Object}      handler  An object literal representing the handler. 
* @param {String}      event    Optional. The event (keydown or keyup) to 
*                               listen for. Defaults automatically to keydown.
*
* @knownissue the "keypress" event is completely broken in Safari 2.x and below.
*             the workaround is use "keydown" for key listening.  However, if
*             it is desired to prevent the default behavior of the keystroke,
*             that can only be done on the keypress event.  This makes key
*             handling quite ugly.
* @knownissue keydown is also broken in Safari 2.x and below for the ESC key.
*             There currently is no workaround other than choosing another
*             key to listen for.
*/
YAHOO.util.KeyListener = function(attachTo, keyData, handler, event) {
    if (!attachTo) {
    } else if (!keyData) {
    } else if (!handler) {
    } 
    
    if (!event) {
        event = YAHOO.util.KeyListener.KEYDOWN;
    }

    /**
    * The CustomEvent fired internally when a key is pressed
    * @event keyEvent
    * @private
    * @param {Object} keyData The object literal representing the key(s) to 
    *                         detect. Possible attributes are shift(boolean), 
    *                         alt(boolean), ctrl(boolean) and keys(either an 
    *                         int or an array of ints representing keycodes).
    */
    var keyEvent = new YAHOO.util.CustomEvent("keyPressed");
    
    /**
    * The CustomEvent fired when the KeyListener is enabled via the enable() 
    * function
    * @event enabledEvent
    * @param {Object} keyData The object literal representing the key(s) to 
    *                         detect. Possible attributes are shift(boolean), 
    *                         alt(boolean), ctrl(boolean) and keys(either an 
    *                         int or an array of ints representing keycodes).
    */
    this.enabledEvent = new YAHOO.util.CustomEvent("enabled");

    /**
    * The CustomEvent fired when the KeyListener is disabled via the 
    * disable() function
    * @event disabledEvent
    * @param {Object} keyData The object literal representing the key(s) to 
    *                         detect. Possible attributes are shift(boolean), 
    *                         alt(boolean), ctrl(boolean) and keys(either an 
    *                         int or an array of ints representing keycodes).
    */
    this.disabledEvent = new YAHOO.util.CustomEvent("disabled");

    if (typeof attachTo == 'string') {
        attachTo = document.getElementById(attachTo);
    }

    if (typeof handler == 'function') {
        keyEvent.subscribe(handler);
    } else {
        keyEvent.subscribe(handler.fn, handler.scope, handler.correctScope);
    }

    /**
    * Handles the key event when a key is pressed.
    * @method handleKeyPress
    * @param {DOMEvent} e   The keypress DOM event
    * @param {Object}   obj The DOM event scope object
    * @private
    */
    function handleKeyPress(e, obj) {
        if (! keyData.shift) {  
            keyData.shift = false; 
        }
        if (! keyData.alt) {    
            keyData.alt = false;
        }
        if (! keyData.ctrl) {
            keyData.ctrl = false;
        }

        // check held down modifying keys first
        if (e.shiftKey == keyData.shift && 
            e.altKey   == keyData.alt &&
            e.ctrlKey  == keyData.ctrl) { // if we pass this, all modifiers match
            
            var dataItem;

            if (keyData.keys instanceof Array) {
                for (var i=0;i<keyData.keys.length;i++) {
                    dataItem = keyData.keys[i];

                    if (dataItem == e.charCode ) {
                        keyEvent.fire(e.charCode, e);
                        break;
                    } else if (dataItem == e.keyCode) {
                        keyEvent.fire(e.keyCode, e);
                        break;
                    }
                }
            } else {
                dataItem = keyData.keys;
                if (dataItem == e.charCode ) {
                    keyEvent.fire(e.charCode, e);
                } else if (dataItem == e.keyCode) {
                    keyEvent.fire(e.keyCode, e);
                }
            }
        }
    }

    /**
    * Enables the KeyListener by attaching the DOM event listeners to the 
    * target DOM element
    * @method enable
    */
    this.enable = function() {
        if (! this.enabled) {
            YAHOO.util.Event.addListener(attachTo, event, handleKeyPress);
            this.enabledEvent.fire(keyData);
        }
        /**
        * Boolean indicating the enabled/disabled state of the Tooltip
        * @property enabled
        * @type Boolean
        */
        this.enabled = true;
    };

    /**
    * Disables the KeyListener by removing the DOM event listeners from the 
    * target DOM element
    * @method disable
    */
    this.disable = function() {
        if (this.enabled) {
            YAHOO.util.Event.removeListener(attachTo, event, handleKeyPress);
            this.disabledEvent.fire(keyData);
        }
        this.enabled = false;
    };

    /**
    * Returns a String representation of the object.
    * @method toString
    * @return {String}  The string representation of the KeyListener
    */ 
    this.toString = function() {
        return "KeyListener [" + keyData.keys + "] " + attachTo.tagName + 
                (attachTo.id ? "[" + attachTo.id + "]" : "");
    };

};

/**
 * Constant representing the DOM "keydown" event.
 * @property YAHOO.util.KeyListener.KEYDOWN
 * @static
 * @final
 * @type String
 */
YAHOO.util.KeyListener.KEYDOWN = "keydown";

/**
 * Constant representing the DOM "keyup" event.
 * @property YAHOO.util.KeyListener.KEYUP
 * @static
 * @final
 * @type String
 */
YAHOO.util.KeyListener.KEYUP = "keyup";

/**
 * keycode constants for a subset of the special keys
 * @property KEY
 * @static
 * @final
 */
YAHOO.util.KeyListener.KEY = {
    ALT          : 18,
    BACK_SPACE   : 8,
    CAPS_LOCK    : 20,
    CONTROL      : 17,
    DELETE       : 46,
    DOWN         : 40,
    END          : 35,
    ENTER        : 13,
    ESCAPE       : 27,
    HOME         : 36,
    LEFT         : 37,
    META         : 224,
    NUM_LOCK     : 144,
    PAGE_DOWN    : 34,
    PAGE_UP      : 33, 
    PAUSE        : 19,
    PRINTSCREEN  : 44,
    RIGHT        : 39,
    SCROLL_LOCK  : 145,
    SHIFT        : 16,
    SPACE        : 32,
    TAB          : 9,
    UP           : 38
};
YAHOO.register("event", YAHOO.util.Event, {version: "2.6.0", build: "1321"});
/*
Copyright (c) 2008, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.6.0
*/
/**
 * Provides Attribute configurations.
 * @namespace YAHOO.util
 * @class Attribute
 * @constructor
 * @param hash {Object} The intial Attribute.
 * @param {YAHOO.util.AttributeProvider} The owner of the Attribute instance.
 */

YAHOO.util.Attribute = function(hash, owner) {
    if (owner) { 
        this.owner = owner;
        this.configure(hash, true);
    }
};

YAHOO.util.Attribute.prototype = {
	/**
     * The name of the attribute.
	 * @property name
	 * @type String
	 */
    name: undefined,
    
	/**
     * The value of the attribute.
	 * @property value
	 * @type String
	 */
    value: null,
    
	/**
     * The owner of the attribute.
	 * @property owner
	 * @type YAHOO.util.AttributeProvider
	 */
    owner: null,
    
	/**
     * Whether or not the attribute is read only.
	 * @property readOnly
	 * @type Boolean
	 */
    readOnly: false,
    
	/**
     * Whether or not the attribute can only be written once.
	 * @property writeOnce
	 * @type Boolean
	 */
    writeOnce: false,

	/**
     * The attribute's initial configuration.
     * @private
	 * @property _initialConfig
	 * @type Object
	 */
    _initialConfig: null,
    
	/**
     * Whether or not the attribute's value has been set.
     * @private
	 * @property _written
	 * @type Boolean
	 */
    _written: false,
    
	/**
     * The method to use when setting the attribute's value.
     * The method recieves the new value as the only argument.
	 * @property method
	 * @type Function
	 */
    method: null,
    
	/**
     * The validator to use when setting the attribute's value.
	 * @property validator
	 * @type Function
     * @return Boolean
	 */
    validator: null,
    
    /**
     * Retrieves the current value of the attribute.
     * @method getValue
     * @return {any} The current value of the attribute.
     */
    getValue: function() {
        return this.value;
    },
    
    /**
     * Sets the value of the attribute and fires beforeChange and change events.
     * @method setValue
     * @param {Any} value The value to apply to the attribute.
     * @param {Boolean} silent If true the change events will not be fired.
     * @return {Boolean} Whether or not the value was set.
     */
    setValue: function(value, silent) {
        var beforeRetVal;
        var owner = this.owner;
        var name = this.name;
        
        var event = {
            type: name, 
            prevValue: this.getValue(),
            newValue: value
        };
        
        if (this.readOnly || ( this.writeOnce && this._written) ) {
            return false; // write not allowed
        }
        
        if (this.validator && !this.validator.call(owner, value) ) {
            return false; // invalid value
        }

        if (!silent) {
            beforeRetVal = owner.fireBeforeChangeEvent(event);
            if (beforeRetVal === false) {
                return false;
            }
        }

        if (this.method) {
            this.method.call(owner, value);
        }
        
        this.value = value;
        this._written = true;
        
        event.type = name;
        
        if (!silent) {
            this.owner.fireChangeEvent(event);
        }
        
        return true;
    },
    
    /**
     * Allows for configuring the Attribute's properties.
     * @method configure
     * @param {Object} map A key-value map of Attribute properties.
     * @param {Boolean} init Whether or not this should become the initial config.
     */
    configure: function(map, init) {
        map = map || {};

        this._written = false; // reset writeOnce
        this._initialConfig = this._initialConfig || {};
        
        for (var key in map) {
            if ( map.hasOwnProperty(key) ) {
                this[key] = map[key];
                if (init) {
                    this._initialConfig[key] = map[key];
                }
            }
        }
    },
    
    /**
     * Resets the value to the initial config value.
     * @method resetValue
     * @return {Boolean} Whether or not the value was set.
     */
    resetValue: function() {
        return this.setValue(this._initialConfig.value);
    },
    
    /**
     * Resets the attribute config to the initial config state.
     * @method resetConfig
     */
    resetConfig: function() {
        this.configure(this._initialConfig);
    },
    
    /**
     * Resets the value to the current value.
     * Useful when values may have gotten out of sync with actual properties.
     * @method refresh
     * @return {Boolean} Whether or not the value was set.
     */
    refresh: function(silent) {
        this.setValue(this.value, silent);
    }
};

(function() {
    var Lang = YAHOO.util.Lang;

    /*
    Copyright (c) 2006, Yahoo! Inc. All rights reserved.
    Code licensed under the BSD License:
    http://developer.yahoo.net/yui/license.txt
    */
    
    /**
     * Provides and manages YAHOO.util.Attribute instances
     * @namespace YAHOO.util
     * @class AttributeProvider
     * @uses YAHOO.util.EventProvider
     */
    YAHOO.util.AttributeProvider = function() {};

    YAHOO.util.AttributeProvider.prototype = {
        
        /**
         * A key-value map of Attribute configurations
         * @property _configs
         * @protected (may be used by subclasses and augmentors)
         * @private
         * @type {Object}
         */
        _configs: null,
        /**
         * Returns the current value of the attribute.
         * @method get
         * @param {String} key The attribute whose value will be returned.
         * @return {Any} The current value of the attribute.
         */
        get: function(key){
            this._configs = this._configs || {};
            var config = this._configs[key];
            
            if (!config || !this._configs.hasOwnProperty(key)) {
                return undefined;
            }
            
            return config.value;
        },
        
        /**
         * Sets the value of a config.
         * @method set
         * @param {String} key The name of the attribute
         * @param {Any} value The value to apply to the attribute
         * @param {Boolean} silent Whether or not to suppress change events
         * @return {Boolean} Whether or not the value was set.
         */
        set: function(key, value, silent){
            this._configs = this._configs || {};
            var config = this._configs[key];
            
            if (!config) {
                return false;
            }
            
            return config.setValue(value, silent);
        },
    
        /**
         * Returns an array of attribute names.
         * @method getAttributeKeys
         * @return {Array} An array of attribute names.
         */
        getAttributeKeys: function(){
            this._configs = this._configs;
            var keys = [];
            var config;
            for (var key in this._configs) {
                config = this._configs[key];
                if ( Lang.hasOwnProperty(this._configs, key) && 
                        !Lang.isUndefined(config) ) {
                    keys[keys.length] = key;
                }
            }
            
            return keys;
        },
        
        /**
         * Sets multiple attribute values.
         * @method setAttributes
         * @param {Object} map  A key-value map of attributes
         * @param {Boolean} silent Whether or not to suppress change events
         */
        setAttributes: function(map, silent){
            for (var key in map) {
                if ( Lang.hasOwnProperty(map, key) ) {
                    this.set(key, map[key], silent);
                }
            }
        },
    
        /**
         * Resets the specified attribute's value to its initial value.
         * @method resetValue
         * @param {String} key The name of the attribute
         * @param {Boolean} silent Whether or not to suppress change events
         * @return {Boolean} Whether or not the value was set
         */
        resetValue: function(key, silent){
            this._configs = this._configs || {};
            if (this._configs[key]) {
                this.set(key, this._configs[key]._initialConfig.value, silent);
                return true;
            }
            return false;
        },
    
        /**
         * Sets the attribute's value to its current value.
         * @method refresh
         * @param {String | Array} key The attribute(s) to refresh
         * @param {Boolean} silent Whether or not to suppress change events
         */
        refresh: function(key, silent) {
            this._configs = this._configs || {};
            var configs = this._configs;
            
            key = ( ( Lang.isString(key) ) ? [key] : key ) || 
                    this.getAttributeKeys();
            
            for (var i = 0, len = key.length; i < len; ++i) { 
                if (configs.hasOwnProperty(key[i])) {
                    this._configs[key[i]].refresh(silent);
                }
            }
        },
    
        /**
         * Adds an Attribute to the AttributeProvider instance. 
         * @method register
         * @param {String} key The attribute's name
         * @param {Object} map A key-value map containing the
         * attribute's properties.
         * @deprecated Use setAttributeConfig
         */
        register: function(key, map) {
            this.setAttributeConfig(key, map);
        },
        
        
        /**
         * Returns the attribute's properties.
         * @method getAttributeConfig
         * @param {String} key The attribute's name
         * @private
         * @return {object} A key-value map containing all of the
         * attribute's properties.
         */
        getAttributeConfig: function(key) {
            this._configs = this._configs || {};
            var config = this._configs[key] || {};
            var map = {}; // returning a copy to prevent overrides
            
            for (key in config) {
                if ( Lang.hasOwnProperty(config, key) ) {
                    map[key] = config[key];
                }
            }
    
            return map;
        },
        
        /**
         * Sets or updates an Attribute instance's properties. 
         * @method setAttributeConfig
         * @param {String} key The attribute's name.
         * @param {Object} map A key-value map of attribute properties
         * @param {Boolean} init Whether or not this should become the intial config.
         */
        setAttributeConfig: function(key, map, init) {
            this._configs = this._configs || {};
            map = map || {};
            if (!this._configs[key]) {
                map.name = key;
                this._configs[key] = this.createAttribute(map);
            } else {
                this._configs[key].configure(map, init);
            }
        },
        
        /**
         * Sets or updates an Attribute instance's properties. 
         * @method configureAttribute
         * @param {String} key The attribute's name.
         * @param {Object} map A key-value map of attribute properties
         * @param {Boolean} init Whether or not this should become the intial config.
         * @deprecated Use setAttributeConfig
         */
        configureAttribute: function(key, map, init) {
            this.setAttributeConfig(key, map, init);
        },
        
        /**
         * Resets an attribute to its intial configuration. 
         * @method resetAttributeConfig
         * @param {String} key The attribute's name.
         * @private
         */
        resetAttributeConfig: function(key){
            this._configs = this._configs || {};
            this._configs[key].resetConfig();
        },
        
        // wrapper for EventProvider.subscribe
        // to create events on the fly
        subscribe: function(type, callback) {
            this._events = this._events || {};

            if ( !(type in this._events) ) {
                this._events[type] = this.createEvent(type);
            }

            YAHOO.util.EventProvider.prototype.subscribe.apply(this, arguments);
        },

        on: function() {
            this.subscribe.apply(this, arguments);
        },

        addListener: function() {
            this.subscribe.apply(this, arguments);
        },

        /**
         * Fires the attribute's beforeChange event. 
         * @method fireBeforeChangeEvent
         * @param {String} key The attribute's name.
         * @param {Obj} e The event object to pass to handlers.
         */
        fireBeforeChangeEvent: function(e) {
            var type = 'before';
            type += e.type.charAt(0).toUpperCase() + e.type.substr(1) + 'Change';
            e.type = type;
            return this.fireEvent(e.type, e);
        },
        
        /**
         * Fires the attribute's change event. 
         * @method fireChangeEvent
         * @param {String} key The attribute's name.
         * @param {Obj} e The event object to pass to the handlers.
         */
        fireChangeEvent: function(e) {
            e.type += 'Change';
            return this.fireEvent(e.type, e);
        },

        createAttribute: function(map) {
            return new YAHOO.util.Attribute(map, this);
        }
    };
    
    YAHOO.augment(YAHOO.util.AttributeProvider, YAHOO.util.EventProvider);
})();

(function() {
// internal shorthand
var Dom = YAHOO.util.Dom,
    AttributeProvider = YAHOO.util.AttributeProvider;

/**
 * Element provides an wrapper object to simplify adding
 * event listeners, using dom methods, and managing attributes. 
 * @module element
 * @namespace YAHOO.util
 * @requires yahoo, dom, event
 * @beta
 */

/**
 * Element provides an wrapper object to simplify adding
 * event listeners, using dom methods, and managing attributes. 
 * @class Element
 * @uses YAHOO.util.AttributeProvider
 * @constructor
 * @param el {HTMLElement | String} The html element that 
 * represents the Element.
 * @param {Object} map A key-value map of initial config names and values
 */
YAHOO.util.Element = function(el, map) {
    if (arguments.length) {
        this.init(el, map);
    }
};

YAHOO.util.Element.prototype = {
    /**
     * Dom events supported by the Element instance.
     * @property DOM_EVENTS
     * @type Object
     */
    DOM_EVENTS: null,

    /**
     * Wrapper for HTMLElement method.
     * @method appendChild
     * @param {YAHOO.util.Element || HTMLElement} child The element to append. 
     * @return {HTMLElement} The appended DOM element. 
     */
    appendChild: function(child) {
        child = child.get ? child.get('element') : child;
        return this.get('element').appendChild(child);
    },
    
    /**
     * Wrapper for HTMLElement method.
     * @method getElementsByTagName
     * @param {String} tag The tagName to collect
     * @return {HTMLCollection} A collection of DOM elements. 
     */
    getElementsByTagName: function(tag) {
        return this.get('element').getElementsByTagName(tag);
    },
    
    /**
     * Wrapper for HTMLElement method.
     * @method hasChildNodes
     * @return {Boolean} Whether or not the element has childNodes
     */
    hasChildNodes: function() {
        return this.get('element').hasChildNodes();
    },
    
    /**
     * Wrapper for HTMLElement method.
     * @method insertBefore
     * @param {HTMLElement} element The HTMLElement to insert
     * @param {HTMLElement} before The HTMLElement to insert
     * the element before.
     * @return {HTMLElement} The inserted DOM element. 
     */
    insertBefore: function(element, before) {
        element = element.get ? element.get('element') : element;
        before = (before && before.get) ? before.get('element') : before;
        
        return this.get('element').insertBefore(element, before);
    },
    
    /**
     * Wrapper for HTMLElement method.
     * @method removeChild
     * @param {HTMLElement} child The HTMLElement to remove
     * @return {HTMLElement} The removed DOM element. 
     */
    removeChild: function(child) {
        child = child.get ? child.get('element') : child;
        return this.get('element').removeChild(child);
    },
    
    /**
     * Wrapper for HTMLElement method.
     * @method replaceChild
     * @param {HTMLElement} newNode The HTMLElement to insert
     * @param {HTMLElement} oldNode The HTMLElement to replace
     * @return {HTMLElement} The replaced DOM element. 
     */
    replaceChild: function(newNode, oldNode) {
        newNode = newNode.get ? newNode.get('element') : newNode;
        oldNode = oldNode.get ? oldNode.get('element') : oldNode;
        return this.get('element').replaceChild(newNode, oldNode);
    },

    
    /**
     * Registers Element specific attributes.
     * @method initAttributes
     * @param {Object} map A key-value map of initial attribute configs
     */
    initAttributes: function(map) {
    },

    /**
     * Adds a listener for the given event.  These may be DOM or 
     * customEvent listeners.  Any event that is fired via fireEvent
     * can be listened for.  All handlers receive an event object. 
     * @method addListener
     * @param {String} type The name of the event to listen for
     * @param {Function} fn The handler to call when the event fires
     * @param {Any} obj A variable to pass to the handler
     * @param {Object} scope The object to use for the scope of the handler 
     */
    addListener: function(type, fn, obj, scope) {
        var el = this.get('element') || this.get('id');
        scope = scope || this;
        
        var self = this; 
        if (!this._events[type]) { // create on the fly
            if (el && this.DOM_EVENTS[type]) {
                YAHOO.util.Event.addListener(el, type, function(e) {
                    if (e.srcElement && !e.target) { // supplement IE with target
                        e.target = e.srcElement;
                    }
                    self.fireEvent(type, e);
                }, obj, scope);
            }
            this.createEvent(type, this);
        }
        
        return YAHOO.util.EventProvider.prototype.subscribe.apply(this, arguments); // notify via customEvent
    },
    
    
    /**
     * Alias for addListener
     * @method on
     * @param {String} type The name of the event to listen for
     * @param {Function} fn The function call when the event fires
     * @param {Any} obj A variable to pass to the handler
     * @param {Object} scope The object to use for the scope of the handler 
     */
    on: function() {
        return this.addListener.apply(this, arguments);
    },
    
    /**
     * Alias for addListener
     * @method subscribe
     * @param {String} type The name of the event to listen for
     * @param {Function} fn The function call when the event fires
     * @param {Any} obj A variable to pass to the handler
     * @param {Object} scope The object to use for the scope of the handler 
     */
    subscribe: function() {
        return this.addListener.apply(this, arguments);
    },
    
    /**
     * Remove an event listener
     * @method removeListener
     * @param {String} type The name of the event to listen for
     * @param {Function} fn The function call when the event fires
     */
    removeListener: function(type, fn) {
        return this.unsubscribe.apply(this, arguments);
    },
    
    /**
     * Wrapper for Dom method.
     * @method addClass
     * @param {String} className The className to add
     */
    addClass: function(className) {
        Dom.addClass(this.get('element'), className);
    },
    
    /**
     * Wrapper for Dom method.
     * @method getElementsByClassName
     * @param {String} className The className to collect
     * @param {String} tag (optional) The tag to use in
     * conjunction with class name
     * @return {Array} Array of HTMLElements
     */
    getElementsByClassName: function(className, tag) {
        return Dom.getElementsByClassName(className, tag,
                this.get('element') );
    },
    
    /**
     * Wrapper for Dom method.
     * @method hasClass
     * @param {String} className The className to add
     * @return {Boolean} Whether or not the element has the class name
     */
    hasClass: function(className) {
        return Dom.hasClass(this.get('element'), className); 
    },
    
    /**
     * Wrapper for Dom method.
     * @method removeClass
     * @param {String} className The className to remove
     */
    removeClass: function(className) {
        return Dom.removeClass(this.get('element'), className);
    },
    
    /**
     * Wrapper for Dom method.
     * @method replaceClass
     * @param {String} oldClassName The className to replace
     * @param {String} newClassName The className to add
     */
    replaceClass: function(oldClassName, newClassName) {
        return Dom.replaceClass(this.get('element'), 
                oldClassName, newClassName);
    },
    
    /**
     * Wrapper for Dom method.
     * @method setStyle
     * @param {String} property The style property to set
     * @param {String} value The value to apply to the style property
     */
    setStyle: function(property, value) {
        var el = this.get('element');
        if (!el) {
            return this._queue[this._queue.length] = ['setStyle', arguments];
        }

        return Dom.setStyle(el,  property, value); // TODO: always queuing?
    },
    
    /**
     * Wrapper for Dom method.
     * @method getStyle
     * @param {String} property The style property to retrieve
     * @return {String} The current value of the property
     */
    getStyle: function(property) {
        return Dom.getStyle(this.get('element'),  property);
    },
    
    /**
     * Apply any queued set calls.
     * @method fireQueue
     */
    fireQueue: function() {
        var queue = this._queue;
        for (var i = 0, len = queue.length; i < len; ++i) {
            this[queue[i][0]].apply(this, queue[i][1]);
        }
    },
    
    /**
     * Appends the HTMLElement into either the supplied parentNode.
     * @method appendTo
     * @param {HTMLElement | Element} parentNode The node to append to
     * @param {HTMLElement | Element} before An optional node to insert before
     * @return {HTMLElement} The appended DOM element. 
     */
    appendTo: function(parent, before) {
        parent = (parent.get) ?  parent.get('element') : Dom.get(parent);
        
        this.fireEvent('beforeAppendTo', {
            type: 'beforeAppendTo',
            target: parent
        });
        
        
        before = (before && before.get) ? 
                before.get('element') : Dom.get(before);
        var element = this.get('element');
        
        if (!element) {
            return false;
        }
        
        if (!parent) {
            return false;
        }
        
        if (element.parent != parent) {
            if (before) {
                parent.insertBefore(element, before);
            } else {
                parent.appendChild(element);
            }
        }
        
        
        this.fireEvent('appendTo', {
            type: 'appendTo',
            target: parent
        });

        return element;
    },
    
    get: function(key) {
        var configs = this._configs || {};
        var el = configs.element; // avoid loop due to 'element'
        if (el && !configs[key] && !YAHOO.lang.isUndefined(el.value[key]) ) {
            return el.value[key];
        }

        return AttributeProvider.prototype.get.call(this, key);
    },

    setAttributes: function(map, silent){
        var el = this.get('element');
        for (var key in map) {
            // need to configure if setting unconfigured HTMLElement attribute 
            if ( !this._configs[key] && !YAHOO.lang.isUndefined(el[key]) ) {
                this.setAttributeConfig(key);
            }
        }

        // set based on configOrder
        for (var i = 0, len = this._configOrder.length; i < len; ++i) {
            if (map[this._configOrder[i]] !== undefined) {
                this.set(this._configOrder[i], map[this._configOrder[i]], silent);
            }
        }
    },

    set: function(key, value, silent) {
        var el = this.get('element');
        if (!el) {
            this._queue[this._queue.length] = ['set', arguments];
            if (this._configs[key]) {
                this._configs[key].value = value; // so "get" works while queueing
            
            }
            return;
        }
        
        // set it on the element if not configured and is an HTML attribute
        if ( !this._configs[key] && !YAHOO.lang.isUndefined(el[key]) ) {
            _registerHTMLAttr.call(this, key);
        }

        return AttributeProvider.prototype.set.apply(this, arguments);
    },
    
    setAttributeConfig: function(key, map, init) {
        var el = this.get('element');

        if (el && !this._configs[key] && !YAHOO.lang.isUndefined(el[key]) ) {
            _registerHTMLAttr.call(this, key, map);
        } else {
            AttributeProvider.prototype.setAttributeConfig.apply(this, arguments);
        }
        this._configOrder.push(key);
    },
    
    getAttributeKeys: function() {
        var el = this.get('element');
        var keys = AttributeProvider.prototype.getAttributeKeys.call(this);
        
        //add any unconfigured element keys
        for (var key in el) {
            if (!this._configs[key]) {
                keys[key] = keys[key] || el[key];
            }
        }
        
        return keys;
    },

    createEvent: function(type, scope) {
        this._events[type] = true;
        AttributeProvider.prototype.createEvent.apply(this, arguments);
    },
    
    init: function(el, attr) {
        _initElement.apply(this, arguments); 
    }
};

var _initElement = function(el, attr) {
    this._queue = this._queue || [];
    this._events = this._events || {};
    this._configs = this._configs || {};
    this._configOrder = []; 
    attr = attr || {};
    attr.element = attr.element || el || null;

    this.DOM_EVENTS = {
        'click': true,
        'dblclick': true,
        'keydown': true,
        'keypress': true,
        'keyup': true,
        'mousedown': true,
        'mousemove': true,
        'mouseout': true, 
        'mouseover': true, 
        'mouseup': true,
        'focus': true,
        'blur': true,
        'submit': true
    };

    var isReady = false;  // to determine when to init HTMLElement and content

    if (typeof attr.element === 'string') { // register ID for get() access
        _registerHTMLAttr.call(this, 'id', { value: attr.element });
    }

    if (Dom.get(attr.element)) {
        isReady = true;
        _initHTMLElement.call(this, attr);
        _initContent.call(this, attr);
    }

    YAHOO.util.Event.onAvailable(attr.element, function() {
        if (!isReady) { // otherwise already done
            _initHTMLElement.call(this, attr);
        }

        this.fireEvent('available', { type: 'available', target: Dom.get(attr.element) });  
    }, this, true);
    
    YAHOO.util.Event.onContentReady(attr.element, function() {
        if (!isReady) { // otherwise already done
            _initContent.call(this, attr);
        }
        this.fireEvent('contentReady', { type: 'contentReady', target: Dom.get(attr.element) });  
    }, this, true);
};

var _initHTMLElement = function(attr) {
    /**
     * The HTMLElement the Element instance refers to.
     * @attribute element
     * @type HTMLElement
     */
    this.setAttributeConfig('element', {
        value: Dom.get(attr.element),
        readOnly: true
     });
};

var _initContent = function(attr) {
    this.initAttributes(attr);
    this.setAttributes(attr, true);
    this.fireQueue();

};

/**
 * Sets the value of the property and fires beforeChange and change events.
 * @private
 * @method _registerHTMLAttr
 * @param {YAHOO.util.Element} element The Element instance to
 * register the config to.
 * @param {String} key The name of the config to register
 * @param {Object} map A key-value map of the config's params
 */
var _registerHTMLAttr = function(key, map) {
    var el = this.get('element');
    map = map || {};
    map.name = key;
    map.method = map.method || function(value) {
        if (el) {
            el[key] = value;
        }
    };
    map.value = map.value || el[key];
    this._configs[key] = new YAHOO.util.Attribute(map, this);
};

/**
 * Fires when the Element's HTMLElement can be retrieved by Id.
 * <p>See: <a href="#addListener">Element.addListener</a></p>
 * <p><strong>Event fields:</strong><br>
 * <code>&lt;String&gt; type</code> available<br>
 * <code>&lt;HTMLElement&gt;
 * target</code> the HTMLElement bound to this Element instance<br>
 * <p><strong>Usage:</strong><br>
 * <code>var handler = function(e) {var target = e.target};<br>
 * myTabs.addListener('available', handler);</code></p>
 * @event available
 */
 
/**
 * Fires when the Element's HTMLElement subtree is rendered.
 * <p>See: <a href="#addListener">Element.addListener</a></p>
 * <p><strong>Event fields:</strong><br>
 * <code>&lt;String&gt; type</code> contentReady<br>
 * <code>&lt;HTMLElement&gt;
 * target</code> the HTMLElement bound to this Element instance<br>
 * <p><strong>Usage:</strong><br>
 * <code>var handler = function(e) {var target = e.target};<br>
 * myTabs.addListener('contentReady', handler);</code></p>
 * @event contentReady
 */

/**
 * Fires before the Element is appended to another Element.
 * <p>See: <a href="#addListener">Element.addListener</a></p>
 * <p><strong>Event fields:</strong><br>
 * <code>&lt;String&gt; type</code> beforeAppendTo<br>
 * <code>&lt;HTMLElement/Element&gt;
 * target</code> the HTMLElement/Element being appended to 
 * <p><strong>Usage:</strong><br>
 * <code>var handler = function(e) {var target = e.target};<br>
 * myTabs.addListener('beforeAppendTo', handler);</code></p>
 * @event beforeAppendTo
 */

/**
 * Fires after the Element is appended to another Element.
 * <p>See: <a href="#addListener">Element.addListener</a></p>
 * <p><strong>Event fields:</strong><br>
 * <code>&lt;String&gt; type</code> appendTo<br>
 * <code>&lt;HTMLElement/Element&gt;
 * target</code> the HTMLElement/Element being appended to 
 * <p><strong>Usage:</strong><br>
 * <code>var handler = function(e) {var target = e.target};<br>
 * myTabs.addListener('appendTo', handler);</code></p>
 * @event appendTo
 */

YAHOO.augment(YAHOO.util.Element, AttributeProvider);
})();

YAHOO.register("element", YAHOO.util.Element, {version: "2.6.0", build: "1321"});
/*
Copyright (c) 2008, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.6.0
*/
/**
* @module button
* @description <p>The Button Control enables the creation of rich, graphical 
* buttons that function like traditional HTML form buttons.  <em>Unlike</em> 
* tradition HTML form buttons, buttons created with the Button Control can have 
* a label that is different from its value.  With the inclusion of the optional 
* <a href="module_menu.html">Menu Control</a>, the Button Control can also be
* used to create menu buttons and split buttons, controls that are not 
* available natively in HTML.  The Button Control can also be thought of as a 
* way to create more visually engaging implementations of the browser's 
* default radio-button and check-box controls.</p>
* <p>The Button Control supports the following types:</p>
* <dl>
* <dt>push</dt>
* <dd>Basic push button that can execute a user-specified command when 
* pressed.</dd>
* <dt>link</dt>
* <dd>Navigates to a specified url when pressed.</dd>
* <dt>submit</dt>
* <dd>Submits the parent form when pressed.</dd>
* <dt>reset</dt>
* <dd>Resets the parent form when pressed.</dd>
* <dt>checkbox</dt>
* <dd>Maintains a "checked" state that can be toggled on and off.</dd>
* <dt>radio</dt>
* <dd>Maintains a "checked" state that can be toggled on and off.  Use with 
* the ButtonGroup class to create a set of controls that are mutually 
* exclusive; checking one button in the set will uncheck all others in 
* the group.</dd>
* <dt>menu</dt>
* <dd>When pressed will show/hide a menu.</dd>
* <dt>split</dt>
* <dd>Can execute a user-specified command or display a menu when pressed.</dd>
* </dl>
* @title Button
* @namespace YAHOO.widget
* @requires yahoo, dom, element, event
* @optional container, menu
*/


(function () {


    /**
    * The Button class creates a rich, graphical button.
    * @param {String} p_oElement String specifying the id attribute of the 
    * <code>&#60;input&#62;</code>, <code>&#60;button&#62;</code>,
    * <code>&#60;a&#62;</code>, or <code>&#60;span&#62;</code> element to 
    * be used to create the button.
    * @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-
    * one-html.html#ID-6043025">HTMLInputElement</a>|<a href="http://www.w3.org
    * /TR/2000/WD-DOM-Level-1-20000929/level-one-html.html#ID-34812697">
    * HTMLButtonElement</a>|<a href="
    * http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-html.html#
    * ID-33759296">HTMLElement</a>} p_oElement Object reference for the 
    * <code>&#60;input&#62;</code>, <code>&#60;button&#62;</code>, 
    * <code>&#60;a&#62;</code>, or <code>&#60;span&#62;</code> element to be 
    * used to create the button.
    * @param {Object} p_oElement Object literal specifying a set of   
    * configuration attributes used to create the button.
    * @param {Object} p_oAttributes Optional. Object literal specifying a set  
    * of configuration attributes used to create the button.
    * @namespace YAHOO.widget
    * @class Button
    * @constructor
    * @extends YAHOO.util.Element
    */



    // Shorthard for utilities

    var Dom = YAHOO.util.Dom,
        Event = YAHOO.util.Event,
        Lang = YAHOO.lang,
        UA = YAHOO.env.ua,
        Overlay = YAHOO.widget.Overlay,
        Menu = YAHOO.widget.Menu,
    
    
        // Private member variables
    
        m_oButtons = {},    // Collection of all Button instances
        m_oOverlayManager = null,   // YAHOO.widget.OverlayManager instance
        m_oSubmitTrigger = null,    // The button that submitted the form 
        m_oFocusedButton = null;    // The button that has focus



    // Private methods

    
    
    /**
    * @method createInputElement
    * @description Creates an <code>&#60;input&#62;</code> element of the 
    * specified type.
    * @private
    * @param {String} p_sType String specifying the type of 
    * <code>&#60;input&#62;</code> element to create.
    * @param {String} p_sName String specifying the name of 
    * <code>&#60;input&#62;</code> element to create.
    * @param {String} p_sValue String specifying the value of 
    * <code>&#60;input&#62;</code> element to create.
    * @param {String} p_bChecked Boolean specifying if the  
    * <code>&#60;input&#62;</code> element is to be checked.
    * @return {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-
    * one-html.html#ID-6043025">HTMLInputElement</a>}
    */
    function createInputElement(p_sType, p_sName, p_sValue, p_bChecked) {
    
        var oInput,
            sInput;
    
        if (Lang.isString(p_sType) && Lang.isString(p_sName)) {
        
            if (UA.ie) {
        
                /*
                    For IE it is necessary to create the element with the 
                    "type," "name," "value," and "checked" properties set all 
                    at once.
                */
            
                sInput = "<input type=\"" + p_sType + "\" name=\"" + 
                    p_sName + "\"";
        
                if (p_bChecked) {
        
                    sInput += " checked";
                
                }
                
                sInput += ">";
        
                oInput = document.createElement(sInput);
        
            }
            else {
            
                oInput = document.createElement("input");
                oInput.name = p_sName;
                oInput.type = p_sType;
        
                if (p_bChecked) {
        
                    oInput.checked = true;
                
                }
        
            }
        
            oInput.value = p_sValue;
        
        }

		return oInput;
    
    }
    
    
    /**
    * @method setAttributesFromSrcElement
    * @description Gets the values for all the attributes of the source element 
    * (either <code>&#60;input&#62;</code> or <code>&#60;a&#62;</code>) that 
    * map to Button configuration attributes and sets them into a collection 
    * that is passed to the Button constructor.
    * @private
    * @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-
    * one-html.html#ID-6043025">HTMLInputElement</a>|<a href="http://www.w3.org/
    * TR/2000/WD-DOM-Level-1-20000929/level-one-html.html#ID-
    * 48250443">HTMLAnchorElement</a>} p_oElement Object reference to the HTML 
    * element (either <code>&#60;input&#62;</code> or <code>&#60;span&#62;
    * </code>) used to create the button.
    * @param {Object} p_oAttributes Object reference for the collection of 
    * configuration attributes used to create the button.
    */
    function setAttributesFromSrcElement(p_oElement, p_oAttributes) {
    
        var sSrcElementNodeName = p_oElement.nodeName.toUpperCase(),
            me = this,
            oAttribute,
            oRootNode,
            sText;
            
    
        /**
        * @method setAttributeFromDOMAttribute
        * @description Gets the value of the specified DOM attribute and sets it 
        * into the collection of configuration attributes used to configure 
        * the button.
        * @private
        * @param {String} p_sAttribute String representing the name of the 
        * attribute to retrieve from the DOM element.
        */
        function setAttributeFromDOMAttribute(p_sAttribute) {
    
            if (!(p_sAttribute in p_oAttributes)) {
    
                /*
                    Need to use "getAttributeNode" instead of "getAttribute" 
                    because using "getAttribute," IE will return the innerText 
                    of a <code>&#60;button&#62;</code> for the value attribute  
                    rather than the value of the "value" attribute.
                */
        
                oAttribute = p_oElement.getAttributeNode(p_sAttribute);
        
    
                if (oAttribute && ("value" in oAttribute)) {
    
    
                    p_oAttributes[p_sAttribute] = oAttribute.value;
    
                }
    
            }
        
        }
    
    
        /**
        * @method setFormElementProperties
        * @description Gets the value of the attributes from the form element  
        * and sets them into the collection of configuration attributes used to 
        * configure the button.
        * @private
        */
        function setFormElementProperties() {
    
            setAttributeFromDOMAttribute("type");
    
            if (p_oAttributes.type == "button") {
            
                p_oAttributes.type = "push";
            
            }
    
            if (!("disabled" in p_oAttributes)) {
    
                p_oAttributes.disabled = p_oElement.disabled;
    
            }
    
            setAttributeFromDOMAttribute("name");
            setAttributeFromDOMAttribute("value");
            setAttributeFromDOMAttribute("title");
    
        }

    
        switch (sSrcElementNodeName) {
        
        case "A":
            
            p_oAttributes.type = "link";
            
            setAttributeFromDOMAttribute("href");
            setAttributeFromDOMAttribute("target");
        
            break;
    
        case "INPUT":

            setFormElementProperties();

            if (!("checked" in p_oAttributes)) {
    
                p_oAttributes.checked = p_oElement.checked;
    
            }

            break;

        case "BUTTON":

            setFormElementProperties();

            oRootNode = p_oElement.parentNode.parentNode;

            if (Dom.hasClass(oRootNode, this.CSS_CLASS_NAME + "-checked")) {
            
                p_oAttributes.checked = true;
            
            }

            if (Dom.hasClass(oRootNode, this.CSS_CLASS_NAME + "-disabled")) {

                p_oAttributes.disabled = true;
            
            }

            p_oElement.removeAttribute("value");

            p_oElement.setAttribute("type", "button");

            break;
        
        }

        p_oElement.removeAttribute("id");
        p_oElement.removeAttribute("name");
        
        if (!("tabindex" in p_oAttributes)) {

            p_oAttributes.tabindex = p_oElement.tabIndex;

        }
    
        if (!("label" in p_oAttributes)) {
    
            // Set the "label" property
        
            sText = sSrcElementNodeName == "INPUT" ? 
                            p_oElement.value : p_oElement.innerHTML;
        
    
            if (sText && sText.length > 0) {
                
                p_oAttributes.label = sText;
                
            } 
    
        }
    
    }
    
    
    /**
    * @method initConfig
    * @description Initializes the set of configuration attributes that are 
    * used to instantiate the button.
    * @private
    * @param {Object} Object representing the button's set of 
    * configuration attributes.
    */
    function initConfig(p_oConfig) {
    
        var oAttributes = p_oConfig.attributes,
            oSrcElement = oAttributes.srcelement,
            sSrcElementNodeName = oSrcElement.nodeName.toUpperCase(),
            me = this;
    
    
        if (sSrcElementNodeName == this.NODE_NAME) {
    
            p_oConfig.element = oSrcElement;
            p_oConfig.id = oSrcElement.id;

            Dom.getElementsBy(function (p_oElement) {
            
                switch (p_oElement.nodeName.toUpperCase()) {
                
                case "BUTTON":
                case "A":
                case "INPUT":

                    setAttributesFromSrcElement.call(me, p_oElement, 
                        oAttributes);

                    break;                        
                
                }
            
            }, "*", oSrcElement);
        
        }
        else {
    
            switch (sSrcElementNodeName) {

            case "BUTTON":
            case "A":
            case "INPUT":

                setAttributesFromSrcElement.call(this, oSrcElement, 
                    oAttributes);

                break;

            }
        
        }
    
    }



    //  Constructor

    YAHOO.widget.Button = function (p_oElement, p_oAttributes) {
    
		if (!Overlay && YAHOO.widget.Overlay) {
		
			Overlay = YAHOO.widget.Overlay;
		
		}


		if (!Menu && YAHOO.widget.Menu) {
		
			Menu = YAHOO.widget.Menu;
		
		}


        var fnSuperClass = YAHOO.widget.Button.superclass.constructor,
            oConfig,
            oElement;
    

        if (arguments.length == 1 && !Lang.isString(p_oElement) && !p_oElement.nodeName) {
    
            if (!p_oElement.id) {
    
                p_oElement.id = Dom.generateId();
    
    
            }
    
    
            fnSuperClass.call(this, (this.createButtonElement(p_oElement.type)), p_oElement);
    
        }
        else {
    
            oConfig = { element: null, attributes: (p_oAttributes || {}) };
    
    
            if (Lang.isString(p_oElement)) {
    
                oElement = Dom.get(p_oElement);
    
                if (oElement) {

                    if (!oConfig.attributes.id) {
                    
                        oConfig.attributes.id = p_oElement;
                    
                    }
    
                
                
                    oConfig.attributes.srcelement = oElement;
                
                    initConfig.call(this, oConfig);
                
                
                    if (!oConfig.element) {
                
                
                        oConfig.element = this.createButtonElement(oConfig.attributes.type);
                
                    }
                
                    fnSuperClass.call(this, oConfig.element, oConfig.attributes);
    
                }
    
            }
            else if (p_oElement.nodeName) {
    
                if (!oConfig.attributes.id) {
    
                    if (p_oElement.id) {
        
                        oConfig.attributes.id = p_oElement.id;
                    
                    }
                    else {
        
                        oConfig.attributes.id = Dom.generateId();
        
        
                    }
    
                }
    
    
    
                oConfig.attributes.srcelement = p_oElement;
        
                initConfig.call(this, oConfig);
        
        
                if (!oConfig.element) {
    
            
                    oConfig.element = this.createButtonElement(oConfig.attributes.type);
            
                }
            
                fnSuperClass.call(this, oConfig.element, oConfig.attributes);
            
            }
    
        }
    
    };



    YAHOO.extend(YAHOO.widget.Button, YAHOO.util.Element, {
    
    
        // Protected properties
        
        
        /** 
        * @property _button
        * @description Object reference to the button's internal 
        * <code>&#60;a&#62;</code> or <code>&#60;button&#62;</code> element.
        * @default null
        * @protected
        * @type <a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
        * level-one-html.html#ID-48250443">HTMLAnchorElement</a>|<a href="
        * http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-html.html
        * #ID-34812697">HTMLButtonElement</a>
        */
        _button: null,
        
        
        /** 
        * @property _menu
        * @description Object reference to the button's menu.
        * @default null
        * @protected
        * @type {<a href="YAHOO.widget.Overlay.html">YAHOO.widget.Overlay</a>|
        * <a href="YAHOO.widget.Menu.html">YAHOO.widget.Menu</a>}
        */
        _menu: null,
        
        
        /** 
        * @property _hiddenFields
        * @description Object reference to the <code>&#60;input&#62;</code>  
        * element, or array of HTML form elements used to represent the button
        *  when its parent form is submitted.
        * @default null
        * @protected
        * @type <a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
        * level-one-html.html#ID-6043025">HTMLInputElement</a>|Array
        */
        _hiddenFields: null,
        
        
        /** 
        * @property _onclickAttributeValue
        * @description Object reference to the button's current value for the 
        * "onclick" configuration attribute.
        * @default null
        * @protected
        * @type Object
        */
        _onclickAttributeValue: null,
        
        
        /** 
        * @property _activationKeyPressed
        * @description Boolean indicating if the key(s) that toggle the button's 
        * "active" state have been pressed.
        * @default false
        * @protected
        * @type Boolean
        */
        _activationKeyPressed: false,
        
        
        /** 
        * @property _activationButtonPressed
        * @description Boolean indicating if the mouse button that toggles 
        * the button's "active" state has been pressed.
        * @default false
        * @protected
        * @type Boolean
        */
        _activationButtonPressed: false,
        
        
        /** 
        * @property _hasKeyEventHandlers
        * @description Boolean indicating if the button's "blur", "keydown" and 
        * "keyup" event handlers are assigned
        * @default false
        * @protected
        * @type Boolean
        */
        _hasKeyEventHandlers: false,
        
        
        /** 
        * @property _hasMouseEventHandlers
        * @description Boolean indicating if the button's "mouseout," 
        * "mousedown," and "mouseup" event handlers are assigned
        * @default false
        * @protected
        * @type Boolean
        */
        _hasMouseEventHandlers: false,


        /** 
        * @property _nOptionRegionX
        * @description Number representing the X coordinate of the leftmost edge of the Button's 
        * option region.  Applies only to Buttons of type "split".
        * @default 0
        * @protected
        * @type Number
        */        
        _nOptionRegionX: 0,
        


        // Constants
        
        
        /**
        * @property NODE_NAME
        * @description The name of the node to be used for the button's 
        * root element.
        * @default "SPAN"
        * @final
        * @type String
        */
        NODE_NAME: "SPAN",
        
        
        /**
        * @property CHECK_ACTIVATION_KEYS
        * @description Array of numbers representing keys that (when pressed) 
        * toggle the button's "checked" attribute.
        * @default [32]
        * @final
        * @type Array
        */
        CHECK_ACTIVATION_KEYS: [32],
        
        
        /**
        * @property ACTIVATION_KEYS
        * @description Array of numbers representing keys that (when presed) 
        * toggle the button's "active" state.
        * @default [13, 32]
        * @final
        * @type Array
        */
        ACTIVATION_KEYS: [13, 32],
        
        
        /**
        * @property OPTION_AREA_WIDTH
        * @description Width (in pixels) of the area of a split button that  
        * when pressed will display a menu.
        * @default 20
        * @final
        * @type Number
        */
        OPTION_AREA_WIDTH: 20,
        
        
        /**
        * @property CSS_CLASS_NAME
        * @description String representing the CSS class(es) to be applied to  
        * the button's root element.
        * @default "yui-button"
        * @final
        * @type String
        */
        CSS_CLASS_NAME: "yui-button",
        
        
        /**
        * @property RADIO_DEFAULT_TITLE
        * @description String representing the default title applied to buttons 
        * of type "radio." 
        * @default "Unchecked.  Click to check."
        * @final
        * @type String
        */
        RADIO_DEFAULT_TITLE: "Unchecked.  Click to check.",
        
        
        /**
        * @property RADIO_CHECKED_TITLE
        * @description String representing the title applied to buttons of 
        * type "radio" when checked.
        * @default "Checked.  Click another button to uncheck"
        * @final
        * @type String
        */
        RADIO_CHECKED_TITLE: "Checked.  Click another button to uncheck",
        
        
        /**
        * @property CHECKBOX_DEFAULT_TITLE
        * @description String representing the default title applied to 
        * buttons of type "checkbox." 
        * @default "Unchecked.  Click to check."
        * @final
        * @type String
        */
        CHECKBOX_DEFAULT_TITLE: "Unchecked.  Click to check.",
        
        
        /**
        * @property CHECKBOX_CHECKED_TITLE
        * @description String representing the title applied to buttons of type 
        * "checkbox" when checked.
        * @default "Checked.  Click to uncheck."
        * @final
        * @type String
        */
        CHECKBOX_CHECKED_TITLE: "Checked.  Click to uncheck.",
        
        
        /**
        * @property MENUBUTTON_DEFAULT_TITLE
        * @description String representing the default title applied to 
        * buttons of type "menu." 
        * @default "Menu collapsed.  Click to expand."
        * @final
        * @type String
        */
        MENUBUTTON_DEFAULT_TITLE: "Menu collapsed.  Click to expand.",
        
        
        /**
        * @property MENUBUTTON_MENU_VISIBLE_TITLE
        * @description String representing the title applied to buttons of type 
        * "menu" when the button's menu is visible. 
        * @default "Menu expanded.  Click or press Esc to collapse."
        * @final
        * @type String
        */
        MENUBUTTON_MENU_VISIBLE_TITLE: 
            "Menu expanded.  Click or press Esc to collapse.",
        
        
        /**
        * @property SPLITBUTTON_DEFAULT_TITLE
        * @description  String representing the default title applied to 
        * buttons of type "split." 
        * @default "Menu collapsed.  Click inside option region or press 
        * Ctrl + Shift + M to show the menu."
        * @final
        * @type String
        */
        SPLITBUTTON_DEFAULT_TITLE: ("Menu collapsed.  Click inside option " + 
            "region or press down arrow key to show the menu."),
        
        
        /**
        * @property SPLITBUTTON_OPTION_VISIBLE_TITLE
        * @description String representing the title applied to buttons of type 
        * "split" when the button's menu is visible. 
        * @default "Menu expanded.  Press Esc or Ctrl + Shift + M to hide 
        * the menu."
        * @final
        * @type String
        */
        SPLITBUTTON_OPTION_VISIBLE_TITLE: 
            "Menu expanded.  Press Esc to hide the menu.",
        
        
        /**
        * @property SUBMIT_TITLE
        * @description String representing the title applied to buttons of 
        * type "submit." 
        * @default "Click to submit form."
        * @final
        * @type String
        */
        SUBMIT_TITLE: "Click to submit form.",
        
        
        
        // Protected attribute setter methods
        
        
        /**
        * @method _setType
        * @description Sets the value of the button's "type" attribute.
        * @protected
        * @param {String} p_sType String indicating the value for the button's 
        * "type" attribute.
        */
        _setType: function (p_sType) {
        
            if (p_sType == "split") {
        
                this.on("option", this._onOption);
        
            }
        
        },
        
        
        /**
        * @method _setLabel
        * @description Sets the value of the button's "label" attribute.
        * @protected
        * @param {String} p_sLabel String indicating the value for the button's 
        * "label" attribute.
        */
        _setLabel: function (p_sLabel) {

            this._button.innerHTML = p_sLabel;

            
            /*
                Remove and add the default class name from the root element
                for Gecko to ensure that the button shrinkwraps to the label.
                Without this the button will not be rendered at the correct 
                width when the label changes.  The most likely cause for this 
                bug is button's use of the Gecko-specific CSS display type of 
                "-moz-inline-box" to simulate "inline-block" supported by IE, 
                Safari and Opera.
            */
            
            var sClass,
                nGeckoVersion = UA.gecko;
				
            
            if (nGeckoVersion && nGeckoVersion < 1.9 && Dom.inDocument(this.get("element"))) {
            
                sClass = this.CSS_CLASS_NAME;                

                this.removeClass(sClass);
                
                Lang.later(0, this, this.addClass, sClass);

            }
        
        },
        
        
        /**
        * @method _setTabIndex
        * @description Sets the value of the button's "tabindex" attribute.
        * @protected
        * @param {Number} p_nTabIndex Number indicating the value for the 
        * button's "tabindex" attribute.
        */
        _setTabIndex: function (p_nTabIndex) {
        
            this._button.tabIndex = p_nTabIndex;
        
        },
        
        
        /**
        * @method _setTitle
        * @description Sets the value of the button's "title" attribute.
        * @protected
        * @param {String} p_nTabIndex Number indicating the value for 
        * the button's "title" attribute.
        */
        _setTitle: function (p_sTitle) {
        
            var sTitle = p_sTitle;
        
            if (this.get("type") != "link") {
        
                if (!sTitle) {
        
                    switch (this.get("type")) {
        
                    case "radio":
    
                        sTitle = this.RADIO_DEFAULT_TITLE;
    
                        break;
    
                    case "checkbox":
    
                        sTitle = this.CHECKBOX_DEFAULT_TITLE;
    
                        break;
                    
                    case "menu":
    
                        sTitle = this.MENUBUTTON_DEFAULT_TITLE;
    
                        break;
    
                    case "split":
    
                        sTitle = this.SPLITBUTTON_DEFAULT_TITLE;
    
                        break;
    
                    case "submit":
    
                        sTitle = this.SUBMIT_TITLE;
    
                        break;
        
                    }
        
                }
        
                this._button.title = sTitle;
        
            }
        
        },
        
        
        /**
        * @method _setDisabled
        * @description Sets the value of the button's "disabled" attribute.
        * @protected
        * @param {Boolean} p_bDisabled Boolean indicating the value for 
        * the button's "disabled" attribute.
        */
        _setDisabled: function (p_bDisabled) {
        
            if (this.get("type") != "link") {
        
                if (p_bDisabled) {
        
                    if (this._menu) {
        
                        this._menu.hide();
        
                    }
        
                    if (this.hasFocus()) {
                    
                        this.blur();
                    
                    }
        
                    this._button.setAttribute("disabled", "disabled");
        
                    this.addStateCSSClasses("disabled");

                    this.removeStateCSSClasses("hover");
                    this.removeStateCSSClasses("active");
                    this.removeStateCSSClasses("focus");
        
                }
                else {
        
                    this._button.removeAttribute("disabled");
        
                    this.removeStateCSSClasses("disabled");
                
                }
        
            }
        
        },

        
        /**
        * @method _setHref
        * @description Sets the value of the button's "href" attribute.
        * @protected
        * @param {String} p_sHref String indicating the value for the button's 
        * "href" attribute.
        */
        _setHref: function (p_sHref) {
        
            if (this.get("type") == "link") {
        
                this._button.href = p_sHref;
            
            }
        
        },
        
        
        /**
        * @method _setTarget
        * @description Sets the value of the button's "target" attribute.
        * @protected
        * @param {String} p_sTarget String indicating the value for the button's 
        * "target" attribute.
        */
        _setTarget: function (p_sTarget) {
        
            if (this.get("type") == "link") {
        
                this._button.setAttribute("target", p_sTarget);
            
            }
        
        },
        
        
        /**
        * @method _setChecked
        * @description Sets the value of the button's "target" attribute.
        * @protected
        * @param {Boolean} p_bChecked Boolean indicating the value for  
        * the button's "checked" attribute.
        */
        _setChecked: function (p_bChecked) {
        
            var sType = this.get("type"),
                sTitle;
        
            if (sType == "checkbox" || sType == "radio") {
        
                if (p_bChecked) {
        
                    this.addStateCSSClasses("checked");
                    
                    sTitle = (sType == "radio") ? 
                                this.RADIO_CHECKED_TITLE : 
                                this.CHECKBOX_CHECKED_TITLE;
                
                }
                else {

                    this.removeStateCSSClasses("checked");
        
                    sTitle = (sType == "radio") ? 
                                this.RADIO_DEFAULT_TITLE : 
                                this.CHECKBOX_DEFAULT_TITLE;
                
                }


        		if (!this._hasDefaultTitle) {
        
                	this.set("title", sTitle);
                
                }
        
            }
        
        },
        
        
        /**
        * @method _setMenu
        * @description Sets the value of the button's "menu" attribute.
        * @protected
        * @param {Object} p_oMenu Object indicating the value for the button's 
        * "menu" attribute.
        */
        _setMenu: function (p_oMenu) {

            var bLazyLoad = this.get("lazyloadmenu"),
                oButtonElement = this.get("element"),
                sMenuCSSClassName,
        
                /*
                    Boolean indicating if the value of p_oMenu is an instance 
                    of YAHOO.widget.Menu or YAHOO.widget.Overlay.
                */
        
                bInstance = false,
        

                oMenu,
                oMenuElement,
                oSrcElement,
                aItems,
                nItems,
                oItem,
                i;
        

			function onAppendTo() {

				oMenu.render(oButtonElement.parentNode);
				
				this.removeListener("appendTo", onAppendTo);
			
			}
			
			
			function setMenuContainer() {

				oMenu.cfg.queueProperty("container", oButtonElement.parentNode);
				
				this.removeListener("appendTo", setMenuContainer);
			
			}


			function initMenu() {
		
				var oContainer;
		
				if (oMenu) {

					Dom.addClass(oMenu.element, this.get("menuclassname"));
					Dom.addClass(oMenu.element, "yui-" + this.get("type") + "-button-menu");

					oMenu.showEvent.subscribe(this._onMenuShow, null, this);
					oMenu.hideEvent.subscribe(this._onMenuHide, null, this);
					oMenu.renderEvent.subscribe(this._onMenuRender, null, this);


					if (Menu && oMenu instanceof Menu) {

						if (bLazyLoad) {

							oContainer = this.get("container");

							if (oContainer) {

								oMenu.cfg.queueProperty("container", oContainer);

							}
							else {

								this.on("appendTo", setMenuContainer);

							}

						}

						oMenu.cfg.queueProperty("clicktohide", false);

						oMenu.keyDownEvent.subscribe(this._onMenuKeyDown, this, true);
						oMenu.subscribe("click", this._onMenuClick, this, true);
						oMenu.itemAddedEvent.subscribe(this._onMenuItemAdded, this, true);
		
						oSrcElement = oMenu.srcElement;
		
						if (oSrcElement && oSrcElement.nodeName.toUpperCase() == "SELECT") {
				
							oSrcElement.style.display = "none";
							oSrcElement.parentNode.removeChild(oSrcElement);
		
						}
		
					}
					else if (Overlay && oMenu instanceof Overlay) {
		
						if (!m_oOverlayManager) {
		
							m_oOverlayManager = new YAHOO.widget.OverlayManager();
						
						}
						
						m_oOverlayManager.register(oMenu);
						
					}
		
		
					this._menu = oMenu;

		
					if (!bInstance && !bLazyLoad) {
		
						if (Dom.inDocument(oButtonElement)) {
	
							oMenu.render(oButtonElement.parentNode);
						
						}
						else {
		
							this.on("appendTo", onAppendTo);
						
						}
					
					}
		
				}
		
			}

        
            if (Overlay) {
        
				if (Menu) {
				
					sMenuCSSClassName = Menu.prototype.CSS_CLASS_NAME;
				
				}
			
				if (p_oMenu && Menu && (p_oMenu instanceof Menu)) {
			
					oMenu = p_oMenu;
					aItems = oMenu.getItems();
					nItems = aItems.length;
					bInstance = true;
			
			
					if (nItems > 0) {
			
						i = nItems - 1;
			
						do {
			
							oItem = aItems[i];
			
							if (oItem) {
			
								oItem.cfg.subscribeToConfigEvent("selected", 
									this._onMenuItemSelected, oItem, this);
			
							}
			
						}
						while (i--);
			
					}
			
					initMenu.call(this);
			
				}
				else if (Overlay && p_oMenu && (p_oMenu instanceof Overlay)) {
			
					oMenu = p_oMenu;
					bInstance = true;
			
					oMenu.cfg.queueProperty("visible", false);
			
					initMenu.call(this);
			
				}
				else if (Menu && Lang.isArray(p_oMenu)) {

					oMenu = new Menu(Dom.generateId(), { lazyload: bLazyLoad, itemdata: p_oMenu });
						
					this._menu = oMenu;
			
					this.on("appendTo", initMenu);
			
				}
				else if (Lang.isString(p_oMenu)) {
			
					oMenuElement = Dom.get(p_oMenu);
			
					if (oMenuElement) {
			
						if (Menu && Dom.hasClass(oMenuElement, sMenuCSSClassName) || 
							oMenuElement.nodeName.toUpperCase() == "SELECT") {
				
							oMenu = new Menu(p_oMenu, { lazyload: bLazyLoad });
				
							initMenu.call(this);
				
						}
						else if (Overlay) {
			
							oMenu = new Overlay(p_oMenu, { visible: false });
				
							initMenu.call(this);
				
						}
			
					}
			
				}
				else if (p_oMenu && p_oMenu.nodeName) {
			
					if (Menu && Dom.hasClass(p_oMenu, sMenuCSSClassName) || 
							p_oMenu.nodeName.toUpperCase() == "SELECT") {
			
						oMenu = new Menu(p_oMenu, { lazyload: bLazyLoad });
					
						initMenu.call(this);
			
					}
					else if (Overlay) {
			
						if (!p_oMenu.id) {
						
							Dom.generateId(p_oMenu);
						
						}
			
						oMenu = new Overlay(p_oMenu, { visible: false });
			
						initMenu.call(this);
					
					}
				
				}
            
            }
        
        },
        
        
        /**
        * @method _setOnClick
        * @description Sets the value of the button's "onclick" attribute.
        * @protected
        * @param {Object} p_oObject Object indicating the value for the button's 
        * "onclick" attribute.
        */
        _setOnClick: function (p_oObject) {
        
            /*
                Remove any existing listeners if a "click" event handler 
                has already been specified.
            */
        
            if (this._onclickAttributeValue && 
                (this._onclickAttributeValue != p_oObject)) {
        
                this.removeListener("click", this._onclickAttributeValue.fn);
        
                this._onclickAttributeValue = null;
        
            }
        
        
            if (!this._onclickAttributeValue && 
                Lang.isObject(p_oObject) && 
                Lang.isFunction(p_oObject.fn)) {
        
                this.on("click", p_oObject.fn, p_oObject.obj, p_oObject.scope);
        
                this._onclickAttributeValue = p_oObject;
        
            }
        
        },
        
        
        /**
        * @method _setSelectedMenuItem
        * @description Sets the value of the button's 
        * "selectedMenuItem" attribute.
        * @protected
        * @param {Number} p_nIndex Number representing the index of the item 
        * in the button's menu that is currently selected.
        */
        _setSelectedMenuItem: function (p_nIndex) {

            var oMenu = this._menu,
                oMenuItem;


            if (Menu && oMenu && oMenu instanceof Menu) {

                oMenuItem = oMenu.getItem(p_nIndex);
                

                if (oMenuItem && !oMenuItem.cfg.getProperty("selected")) {
                
                    oMenuItem.cfg.setProperty("selected", true);
                
                }
            
            }

        },
        
        
        // Protected methods

        
        
        /**
        * @method _isActivationKey
        * @description Determines if the specified keycode is one that toggles  
        * the button's "active" state.
        * @protected
        * @param {Number} p_nKeyCode Number representing the keycode to 
        * be evaluated.
        * @return {Boolean}
        */
        _isActivationKey: function (p_nKeyCode) {
        
            var sType = this.get("type"),
                aKeyCodes = (sType == "checkbox" || sType == "radio") ? 
                    this.CHECK_ACTIVATION_KEYS : this.ACTIVATION_KEYS,
        
                nKeyCodes = aKeyCodes.length,
                bReturnVal = false,
                i;
        

            if (nKeyCodes > 0) {
        
                i = nKeyCodes - 1;
        
                do {
        
                    if (p_nKeyCode == aKeyCodes[i]) {
        
                        bReturnVal = true;
                        break;
        
                    }
        
                }
                while (i--);
            
            }
            
            return bReturnVal;
        
        },
        
        
        /**
        * @method _isSplitButtonOptionKey
        * @description Determines if the specified keycode is one that toggles  
        * the display of the split button's menu.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        * @return {Boolean}
        */
        _isSplitButtonOptionKey: function (p_oEvent) {

			var bShowMenu = (Event.getCharCode(p_oEvent) == 40);


			var onKeyPress = function (p_oEvent) {

				Event.preventDefault(p_oEvent);

				this.removeListener("keypress", onKeyPress);
			
			};


			// Prevent the browser from scrolling the window
			if (bShowMenu) {

				if (UA.opera) {
	
					this.on("keypress", onKeyPress);
	
				}

				Event.preventDefault(p_oEvent);
			}

            return bShowMenu;
        
        },
        
        
        /**
        * @method _addListenersToForm
        * @description Adds event handlers to the button's form.
        * @protected
        */
        _addListenersToForm: function () {
        
            var oForm = this.getForm(),
                onFormKeyPress = YAHOO.widget.Button.onFormKeyPress,
                bHasKeyPressListener,
                oSrcElement,
                aListeners,
                nListeners,
                i;
        
        
            if (oForm) {
        
                Event.on(oForm, "reset", this._onFormReset, null, this);
                Event.on(oForm, "submit", this._onFormSubmit, null, this);
        
                oSrcElement = this.get("srcelement");
        
        
                if (this.get("type") == "submit" || 
                    (oSrcElement && oSrcElement.type == "submit")) 
                {
                
                    aListeners = Event.getListeners(oForm, "keypress");
                    bHasKeyPressListener = false;
            
                    if (aListeners) {
            
                        nListeners = aListeners.length;
        
                        if (nListeners > 0) {
            
                            i = nListeners - 1;
                            
                            do {
               
                                if (aListeners[i].fn == onFormKeyPress) {
                
                                    bHasKeyPressListener = true;
                                    break;
                                
                                }
                
                            }
                            while (i--);
                        
                        }
                    
                    }
            
            
                    if (!bHasKeyPressListener) {
               
                        Event.on(oForm, "keypress", onFormKeyPress);
            
                    }
        
                }
            
            }
        
        },
        
        
        
        /**
        * @method _showMenu
        * @description Shows the button's menu.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object 
        * passed back by the event utility (YAHOO.util.Event) that triggered 
        * the display of the menu.
        */
        _showMenu: function (p_oEvent) {

            if (YAHOO.widget.MenuManager) {
                YAHOO.widget.MenuManager.hideVisible();
            }

        
            if (m_oOverlayManager) {
                m_oOverlayManager.hideAll();
            }


            var oMenu = this._menu,
            	aMenuAlignment = this.get("menualignment"),
            	bFocusMenu = this.get("focusmenu"),
				fnFocusMethod;


			if (this._renderedMenu) {

				oMenu.cfg.setProperty("context", 
								[this.get("element"), aMenuAlignment[0], aMenuAlignment[1]]);
	
				oMenu.cfg.setProperty("preventcontextoverlap", true);
				oMenu.cfg.setProperty("constraintoviewport", true);

			}
			else {

				oMenu.cfg.queueProperty("context", 
								[this.get("element"), aMenuAlignment[0], aMenuAlignment[1]]);
	
				oMenu.cfg.queueProperty("preventcontextoverlap", true);
				oMenu.cfg.queueProperty("constraintoviewport", true);
			
			}


			/*
				 Refocus the Button before showing its Menu in case the call to 
				 YAHOO.widget.MenuManager.hideVisible() resulted in another element in the 
				 DOM being focused after another Menu was hidden.
			*/
			
			this.focus();


            if (Menu && oMenu && (oMenu instanceof Menu)) {

				// Since Menus automatically focus themselves when made visible, temporarily 
				// replace the Menu focus method so that the value of the Button's "focusmenu"
				// attribute determines if the Menu should be focus when made visible.

				fnFocusMethod = oMenu.focus;

				oMenu.focus = function () {};

				if (this._renderedMenu) {

					oMenu.cfg.setProperty("minscrollheight", this.get("menuminscrollheight"));
					oMenu.cfg.setProperty("maxheight", this.get("menumaxheight"));
				
				}
				else {

					oMenu.cfg.queueProperty("minscrollheight", this.get("menuminscrollheight"));
					oMenu.cfg.queueProperty("maxheight", this.get("menumaxheight"));
				
				}


                oMenu.show();

        		oMenu.focus = fnFocusMethod;

				oMenu.align();
        

                /*
                    Stop the propagation of the event so that the MenuManager 
                    doesn't blur the menu after it gets focus.
                */
        
                if (p_oEvent.type == "mousedown") {
                    Event.stopPropagation(p_oEvent);
                }

        
                if (bFocusMenu) { 
                    oMenu.focus();
                }

            }
            else if (Overlay && oMenu && (oMenu instanceof Overlay)) {

				if (!this._renderedMenu) {
		            oMenu.render(this.get("element").parentNode);
				}

                oMenu.show();
				oMenu.align();

            }
        
        },
        
        
        /**
        * @method _hideMenu
        * @description Hides the button's menu.
        * @protected
        */
        _hideMenu: function () {
        
            var oMenu = this._menu;
        
            if (oMenu) {
        
                oMenu.hide();
        
            }
        
        },
        
        
        
        
        // Protected event handlers
        
        
        /**
        * @method _onMouseOver
        * @description "mouseover" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onMouseOver: function (p_oEvent) {
        
        	var sType = this.get("type"),
        		oElement,
				nOptionRegionX;


			if (sType === "split") {

				oElement = this.get("element");
				nOptionRegionX = 
					(Dom.getX(oElement) + (oElement.offsetWidth - this.OPTION_AREA_WIDTH));
					
				this._nOptionRegionX = nOptionRegionX;
			
			}
        

            if (!this._hasMouseEventHandlers) {
        
				if (sType === "split") {
        
	        		this.on("mousemove", this._onMouseMove);

        		}

                this.on("mouseout", this._onMouseOut);
        
                this._hasMouseEventHandlers = true;
        
            }
        

            this.addStateCSSClasses("hover");


			if (sType === "split" && (Event.getPageX(p_oEvent) > nOptionRegionX)) {
	
				this.addStateCSSClasses("hoveroption");
	
			}

        
            if (this._activationButtonPressed) {
        
                this.addStateCSSClasses("active");
        
            }
        
        
            if (this._bOptionPressed) {
        
                this.addStateCSSClasses("activeoption");
            
            }


            if (this._activationButtonPressed || this._bOptionPressed) {
        
                Event.removeListener(document, "mouseup", this._onDocumentMouseUp);
        
            }

        },


        /**
        * @method _onMouseMove
        * @description "mousemove" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */        
        _onMouseMove: function (p_oEvent) {
        
        	var nOptionRegionX = this._nOptionRegionX;
        
        	if (nOptionRegionX) {

				if (Event.getPageX(p_oEvent) > nOptionRegionX) {
					
					this.addStateCSSClasses("hoveroption");
	
				}
				else {

					this.removeStateCSSClasses("hoveroption");
				
				}
				
        	}
        
        },
        
        /**
        * @method _onMouseOut
        * @description "mouseout" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onMouseOut: function (p_oEvent) {

			var sType = this.get("type");
        
            this.removeStateCSSClasses("hover");
        

            if (sType != "menu") {
        
                this.removeStateCSSClasses("active");
        
            }
        

            if (this._activationButtonPressed || this._bOptionPressed) {
        
                Event.on(document, "mouseup", this._onDocumentMouseUp, null, this);
        
            }


			if (sType === "split" && (Event.getPageX(p_oEvent) > this._nOptionRegionX)) {
			
				this.removeStateCSSClasses("hoveroption");
	
			}
            
        },
        
        
        /**
        * @method _onDocumentMouseUp
        * @description "mouseup" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onDocumentMouseUp: function (p_oEvent) {
        
            this._activationButtonPressed = false;
            this._bOptionPressed = false;
        
            var sType = this.get("type"),
                oTarget,
                oMenuElement;
        
            if (sType == "menu" || sType == "split") {

                oTarget = Event.getTarget(p_oEvent);
                oMenuElement = this._menu.element;
        
                if (oTarget != oMenuElement && 
                    !Dom.isAncestor(oMenuElement, oTarget)) {

                    this.removeStateCSSClasses((sType == "menu" ? 
                        "active" : "activeoption"));
            
                    this._hideMenu();

                }
        
            }
        
            Event.removeListener(document, "mouseup", this._onDocumentMouseUp);
        
        },
        
        
        /**
        * @method _onMouseDown
        * @description "mousedown" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onMouseDown: function (p_oEvent) {
        
            var sType,
            	bReturnVal = true;
        
        
            function onMouseUp() {
            
                this._hideMenu();
                this.removeListener("mouseup", onMouseUp);
            
            }
        
        
            if ((p_oEvent.which || p_oEvent.button) == 1) {
        
        
                if (!this.hasFocus()) {
                
                    this.focus();
                
                }
        
        
                sType = this.get("type");
        
        
                if (sType == "split") {
                
                    if (Event.getPageX(p_oEvent) > this._nOptionRegionX) {
                        
                        this.fireEvent("option", p_oEvent);
						bReturnVal = false;
        
                    }
                    else {
        
                        this.addStateCSSClasses("active");
        
                        this._activationButtonPressed = true;
        
                    }
        
                }
                else if (sType == "menu") {
        
                    if (this.isActive()) {
        
                        this._hideMenu();
        
                        this._activationButtonPressed = false;
        
                    }
                    else {
        
                        this._showMenu(p_oEvent);
        
                        this._activationButtonPressed = true;
                    
                    }
        
                }
                else {
        
                    this.addStateCSSClasses("active");
        
                    this._activationButtonPressed = true;
                
                }
        
        
        
                if (sType == "split" || sType == "menu") {

                    this._hideMenuTimer = Lang.later(250, this, this.on, ["mouseup", onMouseUp]);
        
                }
        
            }
            
            return bReturnVal;
            
        },
        
        
        /**
        * @method _onMouseUp
        * @description "mouseup" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onMouseUp: function (p_oEvent) {
        
            var sType = this.get("type"),
            	oHideMenuTimer = this._hideMenuTimer,
            	bReturnVal = true;
        
        
            if (oHideMenuTimer) {
  
  				oHideMenuTimer.cancel();
        
            }
        
        
            if (sType == "checkbox" || sType == "radio") {
        
                this.set("checked", !(this.get("checked")));
            
            }
        
        
            this._activationButtonPressed = false;
            
        
            if (sType != "menu") {
        
                this.removeStateCSSClasses("active");
            
            }

                
			if (sType == "split" && Event.getPageX(p_oEvent) > this._nOptionRegionX) {
				
				bReturnVal = false;

			}

			return bReturnVal;
            
        },
        
        
        /**
        * @method _onFocus
        * @description "focus" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onFocus: function (p_oEvent) {
        
            var oElement;
        
            this.addStateCSSClasses("focus");
        
            if (this._activationKeyPressed) {
        
                this.addStateCSSClasses("active");
           
            }
        
            m_oFocusedButton = this;
        
        
            if (!this._hasKeyEventHandlers) {
        
                oElement = this._button;
        
                Event.on(oElement, "blur", this._onBlur, null, this);
                Event.on(oElement, "keydown", this._onKeyDown, null, this);
                Event.on(oElement, "keyup", this._onKeyUp, null, this);
        
                this._hasKeyEventHandlers = true;
        
            }
        
        
            this.fireEvent("focus", p_oEvent);
        
        },
        
        
        /**
        * @method _onBlur
        * @description "blur" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onBlur: function (p_oEvent) {
        
            this.removeStateCSSClasses("focus");
        
            if (this.get("type") != "menu") {
        
                this.removeStateCSSClasses("active");

            }    
        
            if (this._activationKeyPressed) {
        
                Event.on(document, "keyup", this._onDocumentKeyUp, null, this);
        
            }
        
        
            m_oFocusedButton = null;
        
            this.fireEvent("blur", p_oEvent);
           
        },
        
        
        /**
        * @method _onDocumentKeyUp
        * @description "keyup" event handler for the document.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onDocumentKeyUp: function (p_oEvent) {
        
            if (this._isActivationKey(Event.getCharCode(p_oEvent))) {
        
                this._activationKeyPressed = false;
                
                Event.removeListener(document, "keyup", this._onDocumentKeyUp);
            
            }
        
        },
        
        
        /**
        * @method _onKeyDown
        * @description "keydown" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onKeyDown: function (p_oEvent) {
        
            var oMenu = this._menu;
        
        
            if (this.get("type") == "split" && 
                this._isSplitButtonOptionKey(p_oEvent)) {
        
                this.fireEvent("option", p_oEvent);
        
            }
            else if (this._isActivationKey(Event.getCharCode(p_oEvent))) {
        
                if (this.get("type") == "menu") {
        
                    this._showMenu(p_oEvent);
        
                }
                else {
        
                    this._activationKeyPressed = true;
                    
                    this.addStateCSSClasses("active");
                
                }
            
            }
        
        
            if (oMenu && oMenu.cfg.getProperty("visible") && 
                Event.getCharCode(p_oEvent) == 27) {
            
                oMenu.hide();
                this.focus();
            
            }
        
        },
        
        
        /**
        * @method _onKeyUp
        * @description "keyup" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onKeyUp: function (p_oEvent) {
        
            var sType;
        
            if (this._isActivationKey(Event.getCharCode(p_oEvent))) {
        
                sType = this.get("type");
        
                if (sType == "checkbox" || sType == "radio") {
        
                    this.set("checked", !(this.get("checked")));
                
                }
        
                this._activationKeyPressed = false;
        
                if (this.get("type") != "menu") {
        
                    this.removeStateCSSClasses("active");
        
                }
        
            }
        
        },
        
        
        /**
        * @method _onClick
        * @description "click" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onClick: function (p_oEvent) {
        
            var sType = this.get("type"),
                sTitle,
                oForm,
                oSrcElement,
                bReturnVal;
        

            switch (sType) {
        
            case "radio":
            case "checkbox":

				if (!this._hasDefaultTitle) {
    
					if (this.get("checked")) {
						
						sTitle = (sType == "radio") ? 
									this.RADIO_CHECKED_TITLE : 
									this.CHECKBOX_CHECKED_TITLE;
					
					}
					else {
					
						sTitle = (sType == "radio") ? 
									this.RADIO_DEFAULT_TITLE : 
									this.CHECKBOX_DEFAULT_TITLE;
					
					}
					
					this.set("title", sTitle);
                
                }
    
                break;
    
            case "submit":

				if (p_oEvent.returnValue !== false) {
    
                	this.submitForm();
                
                }
            
                break;
    
            case "reset":
    
                oForm = this.getForm();
    
                if (oForm) {
    
                    oForm.reset();
                
                }
    
                break;
    
            case "menu":
    
                sTitle = this._menu.cfg.getProperty("visible") ? 
                                this.MENUBUTTON_MENU_VISIBLE_TITLE : 
                                this.MENUBUTTON_DEFAULT_TITLE;
    
                this.set("title", sTitle);
    
                break;
    
            case "split":
    
                if (Event.getPageX(p_oEvent) > this._nOptionRegionX) {
    
                    bReturnVal = false;
                
                }
                else {
    
                    this._hideMenu();
        
                    oSrcElement = this.get("srcelement");
        
                    if (oSrcElement && oSrcElement.type == "submit") {
    
                        this.submitForm();
                    
                    }
                
                }
    
                sTitle = this._menu.cfg.getProperty("visible") ? 
                                this.SPLITBUTTON_OPTION_VISIBLE_TITLE : 
                                this.SPLITBUTTON_DEFAULT_TITLE;
    
                this.set("title", sTitle);
    
                break;
        
            }
        
        	return bReturnVal;
        
        },
        
        
        /**
        * @method _onDblClick
        * @description "dblclick" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onDblClick: function (p_oEvent) {
        
            var bReturnVal = true;
    
			if (this.get("type") == "split" && Event.getPageX(p_oEvent) > this._nOptionRegionX) {

				bReturnVal = false;
			
			}
        
        	return bReturnVal;
        
        },        
        
        
        /**
        * @method _onAppendTo
        * @description "appendTo" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onAppendTo: function (p_oEvent) {
        
            /*
                It is necessary to call "_addListenersToForm" using 
                "setTimeout" to make sure that the button's "form" property 
                returns a node reference.  Sometimes, if you try to get the 
                reference immediately after appending the field, it is null.
            */
        
            Lang.later(0, this, this._addListenersToForm);
        
        },
        
        
        /**
        * @method _onFormReset
        * @description "reset" event handler for the button's form.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event 
        * object passed back by the event utility (YAHOO.util.Event).
        */
        _onFormReset: function (p_oEvent) {
        
            var sType = this.get("type"),
                oMenu = this._menu;
        
            if (sType == "checkbox" || sType == "radio") {
        
                this.resetValue("checked");
        
            }
        
        
            if (Menu && oMenu && (oMenu instanceof Menu)) {
        
                this.resetValue("selectedMenuItem");
        
            }
        
        },


        /**
        * @method _onFormSubmit
        * @description "submit" event handler for the button's form.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event 
        * object passed back by the event utility (YAHOO.util.Event).
        */        
        _onFormSubmit: function (p_oEvent) {
        
        	this.createHiddenFields();
        
        },
        
        
        /**
        * @method _onDocumentMouseDown
        * @description "mousedown" event handler for the document.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onDocumentMouseDown: function (p_oEvent) {

            var oTarget = Event.getTarget(p_oEvent),
                oButtonElement = this.get("element"),
                oMenuElement = this._menu.element;
           
        
            if (oTarget != oButtonElement && 
                !Dom.isAncestor(oButtonElement, oTarget) && 
                oTarget != oMenuElement && 
                !Dom.isAncestor(oMenuElement, oTarget)) {
        
                this._hideMenu();
        
                Event.removeListener(document, "mousedown", 
                    this._onDocumentMouseDown);    
            
            }
        
        },
        
        
        /**
        * @method _onOption
        * @description "option" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onOption: function (p_oEvent) {
        
            if (this.hasClass("yui-split-button-activeoption")) {
        
                this._hideMenu();
        
                this._bOptionPressed = false;
        
            }
            else {
        
                this._showMenu(p_oEvent);    
        
                this._bOptionPressed = true;
        
            }
        
        },
        
        
        /**
        * @method _onMenuShow
        * @description "show" event handler for the button's menu.
        * @private
        * @param {String} p_sType String representing the name of the event  
        * that was fired.
        */
        _onMenuShow: function (p_sType) {
        
            Event.on(document, "mousedown", this._onDocumentMouseDown, 
                null, this);
        
            var sTitle,
                sState;
            
            if (this.get("type") == "split") {
        
                sTitle = this.SPLITBUTTON_OPTION_VISIBLE_TITLE;
                sState = "activeoption";
            
            }
            else {
        
                sTitle = this.MENUBUTTON_MENU_VISIBLE_TITLE;        
                sState = "active";
        
            }
        
            this.addStateCSSClasses(sState);
            this.set("title", sTitle);
        
        },
        
        
        /**
        * @method _onMenuHide
        * @description "hide" event handler for the button's menu.
        * @private
        * @param {String} p_sType String representing the name of the event  
        * that was fired.
        */
        _onMenuHide: function (p_sType) {
            
            var oMenu = this._menu,
                sTitle,
                sState;
        
            
            if (this.get("type") == "split") {
        
                sTitle = this.SPLITBUTTON_DEFAULT_TITLE;
                sState = "activeoption";
        
            }
            else {
        
                sTitle = this.MENUBUTTON_DEFAULT_TITLE;        
                sState = "active";
            }
        
        
            this.removeStateCSSClasses(sState);
            this.set("title", sTitle);
        
        
            if (this.get("type") == "split") {
        
                this._bOptionPressed = false;
            
            }
        
        },
        
        
        /**
        * @method _onMenuKeyDown
        * @description "keydown" event handler for the button's menu.
        * @private
        * @param {String} p_sType String representing the name of the event  
        * that was fired.
        * @param {Array} p_aArgs Array of arguments sent when the event 
        * was fired.
        */
        _onMenuKeyDown: function (p_sType, p_aArgs) {
        
            var oEvent = p_aArgs[0];
        
            if (Event.getCharCode(oEvent) == 27) {
        
                this.focus();
        
                if (this.get("type") == "split") {
                
                    this._bOptionPressed = false;
                
                }
        
            }
        
        },
        
        
        /**
        * @method _onMenuRender
        * @description "render" event handler for the button's menu.
        * @private
        * @param {String} p_sType String representing the name of the  
        * event thatwas fired.
        */
        _onMenuRender: function (p_sType) {
        
            var oButtonElement = this.get("element"),
                oButtonParent = oButtonElement.parentNode,
                oMenuElement = this._menu.element;
        
        
            if (oButtonParent != oMenuElement.parentNode) {
        
                oButtonParent.appendChild(oMenuElement);
            
            }

			this._renderedMenu = true;

            this.set("selectedMenuItem", this.get("selectedMenuItem"));

        },
        
        
        /**
        * @method _onMenuItemSelected
        * @description "selectedchange" event handler for each item in the 
        * button's menu.
        * @private
        * @param {String} p_sType String representing the name of the event  
        * that was fired.
        * @param {Array} p_aArgs Array of arguments sent when the event 
        * was fired.
        * @param {MenuItem} p_oItem Object representing the menu item that
        * subscribed to the event.
        */
        _onMenuItemSelected: function (p_sType, p_aArgs, p_oItem) {

            var bSelected = p_aArgs[0];

            if (bSelected) {
            
                this.set("selectedMenuItem", p_oItem);

            }
        
        },
        
        
        /**
        * @method _onMenuItemAdded
        * @description "itemadded" event handler for the button's menu.
        * @private
        * @param {String} p_sType String representing the name of the event  
        * that was fired.
        * @param {Array} p_aArgs Array of arguments sent when the event
        * was fired.
        * @param {<a href="YAHOO.widget.MenuItem.html">
        * YAHOO.widget.MenuItem</a>} p_oItem Object representing the menu 
        * item that subscribed to the event.
        */
        _onMenuItemAdded: function (p_sType, p_aArgs, p_oItem) {
            
            var oItem = p_aArgs[0];
        
           	oItem.cfg.subscribeToConfigEvent("selected", this._onMenuItemSelected, oItem, this);
        
        },
        
        
        /**
        * @method _onMenuClick
        * @description "click" event handler for the button's menu.
        * @private
        * @param {String} p_sType String representing the name of the event  
        * that was fired.
        * @param {Array} p_aArgs Array of arguments sent when the event 
        * was fired.
        */
        _onMenuClick: function (p_sType, p_aArgs) {

            var oItem = p_aArgs[1],
                oSrcElement;
        
            if (oItem) {
        
				this.set("selectedMenuItem", oItem);

                oSrcElement = this.get("srcelement");
            
                if (oSrcElement && oSrcElement.type == "submit") {
        
                    this.submitForm();
            
                }
            
                this._hideMenu();
            
            }
        
        },
        
        
        
        // Public methods
        
        
        /**
        * @method createButtonElement
        * @description Creates the button's HTML elements.
        * @param {String} p_sType String indicating the type of element 
        * to create.
        * @return {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
        * level-one-html.html#ID-58190037">HTMLElement</a>}
        */
        createButtonElement: function (p_sType) {
        
            var sNodeName = this.NODE_NAME,
                oElement = document.createElement(sNodeName);
        
            oElement.innerHTML =  "<" + sNodeName + " class=\"first-child\">" + 
                (p_sType == "link" ? "<a></a>" : 
                "<button type=\"button\"></button>") + "</" + sNodeName + ">";
        
            return oElement;
        
        },

        
        /**
        * @method addStateCSSClasses
        * @description Appends state-specific CSS classes to the button's root 
        * DOM element.
        */
        addStateCSSClasses: function (p_sState) {
        
            var sType = this.get("type");
        
            if (Lang.isString(p_sState)) {
        
                if (p_sState != "activeoption" && p_sState != "hoveroption") {
        
                    this.addClass(this.CSS_CLASS_NAME + ("-" + p_sState));
        
                }
        
                this.addClass("yui-" + sType + ("-button-" + p_sState));
            
            }
        
        },
        
        
        /**
        * @method removeStateCSSClasses
        * @description Removes state-specific CSS classes to the button's root 
        * DOM element.
        */
        removeStateCSSClasses: function (p_sState) {
        
            var sType = this.get("type");
        
            if (Lang.isString(p_sState)) {
        
                this.removeClass(this.CSS_CLASS_NAME + ("-" + p_sState));
                this.removeClass("yui-" + sType + ("-button-" + p_sState));
            
            }
        
        },
        
        
        /**
        * @method createHiddenFields
        * @description Creates the button's hidden form field and appends it 
        * to its parent form.
        * @return {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
        * level-one-html.html#ID-6043025">HTMLInputElement</a>|Array}
        */
        createHiddenFields: function () {
        
            this.removeHiddenFields();
        
            var oForm = this.getForm(),
                oButtonField,
                sType,
                bCheckable,
                oMenu,
                oMenuItem,
                sButtonName,
                oValue,
                oMenuField,
                oReturnVal,
				sMenuFieldName,
				oMenuSrcElement,
				bMenuSrcElementIsSelect = false;
        
        
            if (oForm && !this.get("disabled")) {
        
                sType = this.get("type");
                bCheckable = (sType == "checkbox" || sType == "radio");
        
        
                if ((bCheckable && this.get("checked")) || (m_oSubmitTrigger == this)) {
                
        
                    oButtonField = createInputElement((bCheckable ? sType : "hidden"),
                                    this.get("name"), this.get("value"), this.get("checked"));
            
            
                    if (oButtonField) {
            
                        if (bCheckable) {
            
                            oButtonField.style.display = "none";
            
                        }
            
                        oForm.appendChild(oButtonField);
            
                    }
        
                }
                    
        
                oMenu = this._menu;
            
            
                if (Menu && oMenu && (oMenu instanceof Menu)) {
        
        
                    oMenuItem = this.get("selectedMenuItem");
					oMenuSrcElement = oMenu.srcElement;
					bMenuSrcElementIsSelect = (oMenuSrcElement && 
												oMenuSrcElement.nodeName.toUpperCase() == "SELECT");

                    if (oMenuItem) {

						oValue = (oMenuItem.value === null || oMenuItem.value === "") ? 
									oMenuItem.cfg.getProperty("text") : oMenuItem.value;

						sButtonName = this.get("name");


						if (bMenuSrcElementIsSelect) {
						
							sMenuFieldName = oMenuSrcElement.name;
						
						}
						else if (sButtonName) {

							sMenuFieldName = (sButtonName + "_options");
						
						}
						

						if (oValue && sMenuFieldName) {
		
							oMenuField = createInputElement("hidden", sMenuFieldName, oValue);
							oForm.appendChild(oMenuField);
		
						}
                    
                    }
                    else if (bMenuSrcElementIsSelect) {
					
						oForm.appendChild(oMenuSrcElement);
                    
                    }
        
                }
            
            
                if (oButtonField && oMenuField) {
        
                    this._hiddenFields = [oButtonField, oMenuField];
        
                }
                else if (!oButtonField && oMenuField) {
        
                    this._hiddenFields = oMenuField;
                
                }
                else if (oButtonField && !oMenuField) {
        
                    this._hiddenFields = oButtonField;
                
                }
        
        		oReturnVal = this._hiddenFields;
        
            }

			return oReturnVal;
        
        },
        
        
        /**
        * @method removeHiddenFields
        * @description Removes the button's hidden form field(s) from its 
        * parent form.
        */
        removeHiddenFields: function () {
        
            var oField = this._hiddenFields,
                nFields,
                i;
        
            function removeChild(p_oElement) {
        
                if (Dom.inDocument(p_oElement)) {
        
                    p_oElement.parentNode.removeChild(p_oElement);
                
                }
                
            }
            
        
            if (oField) {
        
                if (Lang.isArray(oField)) {
        
                    nFields = oField.length;
                    
                    if (nFields > 0) {
                    
                        i = nFields - 1;
                        
                        do {
        
                            removeChild(oField[i]);
        
                        }
                        while (i--);
                    
                    }
                
                }
                else {
        
                    removeChild(oField);
        
                }
        
                this._hiddenFields = null;
            
            }
        
        },
        
        
        /**
        * @method submitForm
        * @description Submits the form to which the button belongs.  Returns  
        * true if the form was submitted successfully, false if the submission 
        * was cancelled.
        * @protected
        * @return {Boolean}
        */
        submitForm: function () {
        
            var oForm = this.getForm(),
        
                oSrcElement = this.get("srcelement"),
        
                /*
                    Boolean indicating if the event fired successfully 
                    (was not cancelled by any handlers)
                */
        
                bSubmitForm = false,
                
                oEvent;
        
        
            if (oForm) {
        
                if (this.get("type") == "submit" || (oSrcElement && oSrcElement.type == "submit")) {
        
                    m_oSubmitTrigger = this;
                    
                }
        
        
                if (UA.ie) {
        
                    bSubmitForm = oForm.fireEvent("onsubmit");
        
                }
                else {  // Gecko, Opera, and Safari
        
                    oEvent = document.createEvent("HTMLEvents");
                    oEvent.initEvent("submit", true, true);
        
                    bSubmitForm = oForm.dispatchEvent(oEvent);
        
                }
        
        
                /*
                    In IE and Safari, dispatching a "submit" event to a form 
                    WILL cause the form's "submit" event to fire, but WILL NOT 
                    submit the form.  Therefore, we need to call the "submit" 
                    method as well.
                */
              
                if ((UA.ie || UA.webkit) && bSubmitForm) {
        
                    oForm.submit();
                
                }
            
            }
        
            return bSubmitForm;
            
        },
        
        
        /**
        * @method init
        * @description The Button class's initialization method.
        * @param {String} p_oElement String specifying the id attribute of the 
        * <code>&#60;input&#62;</code>, <code>&#60;button&#62;</code>,
        * <code>&#60;a&#62;</code>, or <code>&#60;span&#62;</code> element to 
        * be used to create the button.
        * @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
        * level-one-html.html#ID-6043025">HTMLInputElement</a>|<a href="http://
        * www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-html.html
        * #ID-34812697">HTMLButtonElement</a>|<a href="http://www.w3.org/TR
        * /2000/WD-DOM-Level-1-20000929/level-one-html.html#ID-33759296">
        * HTMLElement</a>} p_oElement Object reference for the 
        * <code>&#60;input&#62;</code>, <code>&#60;button&#62;</code>, 
        * <code>&#60;a&#62;</code>, or <code>&#60;span&#62;</code> element to be 
        * used to create the button.
        * @param {Object} p_oElement Object literal specifying a set of 
        * configuration attributes used to create the button.
        * @param {Object} p_oAttributes Optional. Object literal specifying a 
        * set of configuration attributes used to create the button.
        */
        init: function (p_oElement, p_oAttributes) {
        
            var sNodeName = p_oAttributes.type == "link" ? "a" : "button",
                oSrcElement = p_oAttributes.srcelement,
                oButton = p_oElement.getElementsByTagName(sNodeName)[0],
                oInput;


            if (!oButton) {

                oInput = p_oElement.getElementsByTagName("input")[0];


                if (oInput) {

                    oButton = document.createElement("button");
                    oButton.setAttribute("type", "button");

                    oInput.parentNode.replaceChild(oButton, oInput);
                
                }

            }

            this._button = oButton;

            /*
				Capture if the button has a value for the title attribute.  If so, we won't 
				override it for type of "checkbox" or "radio".
            */
            
            this._hasDefaultTitle = (p_oAttributes.title && p_oAttributes.title.length > 0);

            YAHOO.widget.Button.superclass.init.call(this, p_oElement, p_oAttributes);


			var sId = this.get("id"),
				sButtonId = sId + "-button";


        	oButton.id = sButtonId;


			var aLabels,
				oLabel;


        	var hasLabel = function (element) {
        	
				return (element.htmlFor === sId);

        	};


			var setLabel = function () {

				oLabel.setAttribute((UA.ie ? "htmlFor" : "for"), sButtonId);
			
			};


			if (oSrcElement && this.get("type") != "link") {

				aLabels = Dom.getElementsBy(hasLabel, "label");

				if (Lang.isArray(aLabels) && aLabels.length > 0) {
				
					oLabel = aLabels[0];
				
				}

			}
        

            m_oButtons[sId] = this;
        

            this.addClass(this.CSS_CLASS_NAME);
            this.addClass("yui-" + this.get("type") + "-button");
        
            Event.on(this._button, "focus", this._onFocus, null, this);
            this.on("mouseover", this._onMouseOver);
			this.on("mousedown", this._onMouseDown);
			this.on("mouseup", this._onMouseUp);
            this.on("click", this._onClick);
            this.on("dblclick", this._onDblClick);

            if (oLabel) {
            
				this.on("appendTo", setLabel);     
            
            }
            
            this.on("appendTo", this._onAppendTo);
       
        

            var oContainer = this.get("container"),
                oElement = this.get("element"),
                bElInDoc = Dom.inDocument(oElement),
                oParentNode;


            if (oContainer) {
        
                if (oSrcElement && oSrcElement != oElement) {
                
                    oParentNode = oSrcElement.parentNode;

                    if (oParentNode) {
                    
                        oParentNode.removeChild(oSrcElement);
                    
                    }

                }
        
                if (Lang.isString(oContainer)) {
        
                    Event.onContentReady(oContainer, this.appendTo, oContainer, this);
        
                }
                else {
        
        			this.on("init", function () {
        			
        				Lang.later(0, this, this.appendTo, oContainer);
        			
        			});
        
                }
        
            }
            else if (!bElInDoc && oSrcElement && oSrcElement != oElement) {

                oParentNode = oSrcElement.parentNode;
        
                if (oParentNode) {
        
                    this.fireEvent("beforeAppendTo", {
                        type: "beforeAppendTo",
                        target: oParentNode
                    });
            
                    oParentNode.replaceChild(oElement, oSrcElement);
            
                    this.fireEvent("appendTo", {
                        type: "appendTo",
                        target: oParentNode
                    });
                
                }
        
            }
            else if (this.get("type") != "link" && bElInDoc && oSrcElement && 
                oSrcElement == oElement) {
        
                this._addListenersToForm();
        
            }
        
        

			this.fireEvent("init", {
				type: "init",
				target: this
			});        
        
        },
        
        
        /**
        * @method initAttributes
        * @description Initializes all of the configuration attributes used to  
        * create the button.
        * @param {Object} p_oAttributes Object literal specifying a set of 
        * configuration attributes used to create the button.
        */
        initAttributes: function (p_oAttributes) {
        
            var oAttributes = p_oAttributes || {};
        
            YAHOO.widget.Button.superclass.initAttributes.call(this, 
                oAttributes);
        
        
            /**
            * @attribute type
            * @description String specifying the button's type.  Possible 
            * values are: "push," "link," "submit," "reset," "checkbox," 
            * "radio," "menu," and "split."
            * @default "push"
            * @type String
            */
            this.setAttributeConfig("type", {
        
                value: (oAttributes.type || "push"),
                validator: Lang.isString,
                writeOnce: true,
                method: this._setType
        
            });
        
        
            /**
            * @attribute label
            * @description String specifying the button's text label 
            * or innerHTML.
            * @default null
            * @type String
            */
            this.setAttributeConfig("label", {
        
                value: oAttributes.label,
                validator: Lang.isString,
                method: this._setLabel
        
            });
        
        
            /**
            * @attribute value
            * @description Object specifying the value for the button.
            * @default null
            * @type Object
            */
            this.setAttributeConfig("value", {
        
                value: oAttributes.value
        
            });
        
        
            /**
            * @attribute name
            * @description String specifying the name for the button.
            * @default null
            * @type String
            */
            this.setAttributeConfig("name", {
        
                value: oAttributes.name,
                validator: Lang.isString
        
            });
        
        
            /**
            * @attribute tabindex
            * @description Number specifying the tabindex for the button.
            * @default null
            * @type Number
            */
            this.setAttributeConfig("tabindex", {
        
                value: oAttributes.tabindex,
                validator: Lang.isNumber,
                method: this._setTabIndex
        
            });
        
        
            /**
            * @attribute title
            * @description String specifying the title for the button.
            * @default null
            * @type String
            */
            this.configureAttribute("title", {
        
                value: oAttributes.title,
                validator: Lang.isString,
                method: this._setTitle
        
            });
        
        
            /**
            * @attribute disabled
            * @description Boolean indicating if the button should be disabled.  
            * (Disabled buttons are dimmed and will not respond to user input 
            * or fire events.  Does not apply to button's of type "link.")
            * @default false
            * @type Boolean
            */
            this.setAttributeConfig("disabled", {
        
                value: (oAttributes.disabled || false),
                validator: Lang.isBoolean,
                method: this._setDisabled
        
            });
        
        
            /**
            * @attribute href
            * @description String specifying the href for the button.  Applies
            * only to buttons of type "link."
            * @type String
            */
            this.setAttributeConfig("href", {
        
                value: oAttributes.href,
                validator: Lang.isString,
                method: this._setHref
        
            });
        
        
            /**
            * @attribute target
            * @description String specifying the target for the button.  
            * Applies only to buttons of type "link."
            * @type String
            */
            this.setAttributeConfig("target", {
        
                value: oAttributes.target,
                validator: Lang.isString,
                method: this._setTarget
        
            });
        
        
            /**
            * @attribute checked
            * @description Boolean indicating if the button is checked. 
            * Applies only to buttons of type "radio" and "checkbox."
            * @default false
            * @type Boolean
            */
            this.setAttributeConfig("checked", {
        
                value: (oAttributes.checked || false),
                validator: Lang.isBoolean,
                method: this._setChecked
        
            });
        
        
            /**
            * @attribute container
            * @description HTML element reference or string specifying the id 
            * attribute of the HTML element that the button's markup should be 
            * rendered into.
            * @type <a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
            * level-one-html.html#ID-58190037">HTMLElement</a>|String
            * @default null
            */
            this.setAttributeConfig("container", {
        
                value: oAttributes.container,
                writeOnce: true
        
            });
        
        
            /**
            * @attribute srcelement
            * @description Object reference to the HTML element (either 
            * <code>&#60;input&#62;</code> or <code>&#60;span&#62;</code>) 
            * used to create the button.
            * @type <a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
            * level-one-html.html#ID-58190037">HTMLElement</a>|String
            * @default null
            */
            this.setAttributeConfig("srcelement", {
        
                value: oAttributes.srcelement,
                writeOnce: true
        
            });
        
        
            /**
            * @attribute menu
            * @description Object specifying the menu for the button.  
            * The value can be one of the following:
            * <ul>
            * <li>Object specifying a <a href="YAHOO.widget.Menu.html">
            * YAHOO.widget.Menu</a> instance.</li>
            * <li>Object specifying a <a href="YAHOO.widget.Overlay.html">
            * YAHOO.widget.Overlay</a> instance.</li>
            * <li>String specifying the id attribute of the <code>&#60;div&#62;
            * </code> element used to create the menu.  By default the menu 
            * will be created as an instance of 
            * <a href="YAHOO.widget.Overlay.html">YAHOO.widget.Overlay</a>.  
            * If the <a href="YAHOO.widget.Menu.html#CSS_CLASS_NAME">
            * default CSS class name for YAHOO.widget.Menu</a> is applied to 
            * the <code>&#60;div&#62;</code> element, it will be created as an
            * instance of <a href="YAHOO.widget.Menu.html">YAHOO.widget.Menu
            * </a>.</li><li>String specifying the id attribute of the 
            * <code>&#60;select&#62;</code> element used to create the menu.
            * </li><li>Object specifying the <code>&#60;div&#62;</code> element
            * used to create the menu.</li>
            * <li>Object specifying the <code>&#60;select&#62;</code> element
            * used to create the menu.</li>
            * <li>Array of object literals, each representing a set of 
            * <a href="YAHOO.widget.MenuItem.html">YAHOO.widget.MenuItem</a> 
            * configuration attributes.</li>
            * <li>Array of strings representing the text labels for each menu 
            * item in the menu.</li>
            * </ul>
            * @type <a href="YAHOO.widget.Menu.html">YAHOO.widget.Menu</a>|<a 
            * href="YAHOO.widget.Overlay.html">YAHOO.widget.Overlay</a>|<a 
            * href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-
            * one-html.html#ID-58190037">HTMLElement</a>|String|Array
            * @default null
            */
            this.setAttributeConfig("menu", {
        
                value: null,
                method: this._setMenu,
                writeOnce: true
            
            });
        
        
            /**
            * @attribute lazyloadmenu
            * @description Boolean indicating the value to set for the 
            * <a href="YAHOO.widget.Menu.html#lazyLoad">"lazyload"</a>
            * configuration property of the button's menu.  Setting 
            * "lazyloadmenu" to <code>true </code> will defer rendering of 
            * the button's menu until the first time it is made visible.  
            * If "lazyloadmenu" is set to <code>false</code>, the button's 
            * menu will be rendered immediately if the button is in the 
            * document, or in response to the button's "appendTo" event if 
            * the button is not yet in the document.  In either case, the 
            * menu is rendered into the button's parent HTML element.  
            * <em>This attribute does not apply if a 
            * <a href="YAHOO.widget.Menu.html">YAHOO.widget.Menu</a> or 
            * <a href="YAHOO.widget.Overlay.html">YAHOO.widget.Overlay</a> 
            * instance is passed as the value of the button's "menu" 
            * configuration attribute. <a href="YAHOO.widget.Menu.html">
            * YAHOO.widget.Menu</a> or <a href="YAHOO.widget.Overlay.html">
            * YAHOO.widget.Overlay</a> instances should be rendered before 
            * being set as the value for the "menu" configuration 
            * attribute.</em>
            * @default true
            * @type Boolean
            */
            this.setAttributeConfig("lazyloadmenu", {
        
                value: (oAttributes.lazyloadmenu === false ? false : true),
                validator: Lang.isBoolean,
                writeOnce: true
        
            });


            /**
            * @attribute menuclassname
            * @description String representing the CSS class name to be 
            * applied to the root element of the button's menu.
            * @type String
            * @default "yui-button-menu"
            */
            this.setAttributeConfig("menuclassname", {
        
                value: (oAttributes.menuclassname || "yui-button-menu"),
                validator: Lang.isString,
                method: this._setMenuClassName,
                writeOnce: true
        
            });        


			/**
			* @attribute menuminscrollheight
			* @description Number defining the minimum threshold for the "menumaxheight" 
			* configuration attribute.  When set this attribute is automatically applied 
			* to all submenus.
			* @default 90
			* @type Number
			*/
            this.setAttributeConfig("menuminscrollheight", {
        
                value: (oAttributes.menuminscrollheight || 90),
                validator: Lang.isNumber
        
            });


            /**
            * @attribute menumaxheight
			* @description Number defining the maximum height (in pixels) for a menu's 
			* body element (<code>&#60;div class="bd"&#60;</code>).  Once a menu's body 
			* exceeds this height, the contents of the body are scrolled to maintain 
			* this value.  This value cannot be set lower than the value of the 
			* "minscrollheight" configuration property.
            * @type Number
            * @default 0
            */
            this.setAttributeConfig("menumaxheight", {
        
                value: (oAttributes.menumaxheight || 0),
                validator: Lang.isNumber
        
            });


            /**
            * @attribute menualignment
			* @description Array defining how the Button's Menu is aligned to the Button.  
            * The default value of ["tl", "bl"] aligns the Menu's top left corner to the Button's 
            * bottom left corner.
            * @type Array
            * @default ["tl", "bl"]
            */
            this.setAttributeConfig("menualignment", {
        
                value: (oAttributes.menualignment || ["tl", "bl"]),
                validator: Lang.isArray
        
            });
            

            /**
            * @attribute selectedMenuItem
            * @description Object representing the item in the button's menu 
            * that is currently selected.
            * @type Number
            * @default null
            */
            this.setAttributeConfig("selectedMenuItem", {
        
                value: null,
                method: this._setSelectedMenuItem
        
            });
        
        
            /**
            * @attribute onclick
            * @description Object literal representing the code to be executed  
            * when the button is clicked.  Format:<br> <code> {<br> 
            * <strong>fn:</strong> Function,   &#47;&#47; The handler to call 
            * when the event fires.<br> <strong>obj:</strong> Object, 
            * &#47;&#47; An object to pass back to the handler.<br> 
            * <strong>scope:</strong> Object &#47;&#47;  The object to use 
            * for the scope of the handler.<br> } </code>
            * @type Object
            * @default null
            */
            this.setAttributeConfig("onclick", {
        
                value: oAttributes.onclick,
                method: this._setOnClick
            
            });


            /**
            * @attribute focusmenu
            * @description Boolean indicating whether or not the button's menu 
            * should be focused when it is made visible.
            * @type Boolean
            * @default true
            */
            this.setAttributeConfig("focusmenu", {
        
                value: (oAttributes.focusmenu === false ? false : true),
                validator: Lang.isBoolean
        
            });

        },
        
        
        /**
        * @method focus
        * @description Causes the button to receive the focus and fires the 
        * button's "focus" event.
        */
        focus: function () {
        
            if (!this.get("disabled")) {
        
                this._button.focus();
            
            }
        
        },
        
        
        /**
        * @method blur
        * @description Causes the button to lose focus and fires the button's
        * "blur" event.
        */
        blur: function () {
        
            if (!this.get("disabled")) {
        
                this._button.blur();
        
            }
        
        },
        
        
        /**
        * @method hasFocus
        * @description Returns a boolean indicating whether or not the button 
        * has focus.
        * @return {Boolean}
        */
        hasFocus: function () {
        
            return (m_oFocusedButton == this);
        
        },
        
        
        /**
        * @method isActive
        * @description Returns a boolean indicating whether or not the button 
        * is active.
        * @return {Boolean}
        */
        isActive: function () {
        
            return this.hasClass(this.CSS_CLASS_NAME + "-active");
        
        },
        
        
        /**
        * @method getMenu
        * @description Returns a reference to the button's menu.
        * @return {<a href="YAHOO.widget.Overlay.html">
        * YAHOO.widget.Overlay</a>|<a 
        * href="YAHOO.widget.Menu.html">YAHOO.widget.Menu</a>}
        */
        getMenu: function () {
        
            return this._menu;
        
        },
        
        
        /**
        * @method getForm
        * @description Returns a reference to the button's parent form.
        * @return {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-
        * 20000929/level-one-html.html#ID-40002357">HTMLFormElement</a>}
        */
        getForm: function () {
        
        	var oButton = this._button,
        		oForm;
        
            if (oButton) {
            
            	oForm = oButton.form;
            
            }
        
        	return oForm;
        
        },
        
        
        /** 
        * @method getHiddenFields
        * @description Returns an <code>&#60;input&#62;</code> element or 
        * array of form elements used to represent the button when its parent 
        * form is submitted.  
        * @return {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
        * level-one-html.html#ID-6043025">HTMLInputElement</a>|Array}
        */
        getHiddenFields: function () {
        
            return this._hiddenFields;
        
        },
        
        
        /**
        * @method destroy
        * @description Removes the button's element from its parent element and 
        * removes all event handlers.
        */
        destroy: function () {
        
        
            var oElement = this.get("element"),
                oParentNode = oElement.parentNode,
                oMenu = this._menu,
                aButtons;
        
            if (oMenu) {
        

                if (m_oOverlayManager && m_oOverlayManager.find(oMenu)) {

                    m_oOverlayManager.remove(oMenu);

                }
        
                oMenu.destroy();
        
            }
        
        
            Event.purgeElement(oElement);
            Event.purgeElement(this._button);
            Event.removeListener(document, "mouseup", this._onDocumentMouseUp);
            Event.removeListener(document, "keyup", this._onDocumentKeyUp);
            Event.removeListener(document, "mousedown", this._onDocumentMouseDown);
        
        
            var oForm = this.getForm();
            
            if (oForm) {
        
                Event.removeListener(oForm, "reset", this._onFormReset);
                Event.removeListener(oForm, "submit", this._onFormSubmit);
        
            }


            this.unsubscribeAll();

            if (oParentNode) {

                oParentNode.removeChild(oElement);
            
            }
        
        
            delete m_oButtons[this.get("id")];

            aButtons = Dom.getElementsByClassName(this.CSS_CLASS_NAME, 
                                this.NODE_NAME, oForm); 

            if (Lang.isArray(aButtons) && aButtons.length === 0) {

                Event.removeListener(oForm, "keypress", 
                        YAHOO.widget.Button.onFormKeyPress);

            }

        
        },
        
        
        fireEvent: function (p_sType , p_aArgs) {
        
			var sType = arguments[0];
		
			//  Disabled buttons should not respond to DOM events
		
			if (this.DOM_EVENTS[sType] && this.get("disabled")) {
		
				return false;
		
			}
		
			return YAHOO.widget.Button.superclass.fireEvent.apply(this, arguments);
        
        },
        
        
        /**
        * @method toString
        * @description Returns a string representing the button.
        * @return {String}
        */
        toString: function () {
        
            return ("Button " + this.get("id"));
        
        }
    
    });
    
    
    /**
    * @method YAHOO.widget.Button.onFormKeyPress
    * @description "keypress" event handler for the button's form.
    * @param {Event} p_oEvent Object representing the DOM event object passed 
    * back by the event utility (YAHOO.util.Event).
    */
    YAHOO.widget.Button.onFormKeyPress = function (p_oEvent) {
    
        var oTarget = Event.getTarget(p_oEvent),
            nCharCode = Event.getCharCode(p_oEvent),
            sNodeName = oTarget.nodeName && oTarget.nodeName.toUpperCase(),
            sType = oTarget.type,
    
            /*
                Boolean indicating if the form contains any enabled or 
                disabled YUI submit buttons
            */
    
            bFormContainsYUIButtons = false,
    
            oButton,
    
            oYUISubmitButton,   // The form's first, enabled YUI submit button
    
            /*
                 The form's first, enabled HTML submit button that precedes any 
                 YUI submit button
            */
    
            oPrecedingSubmitButton,
            
            oEvent; 
    
    
        function isSubmitButton(p_oElement) {
    
            var sId,
                oSrcElement;
    
            switch (p_oElement.nodeName.toUpperCase()) {
    
            case "INPUT":
            case "BUTTON":
            
                if (p_oElement.type == "submit" && !p_oElement.disabled) {
                    
                    if (!bFormContainsYUIButtons && !oPrecedingSubmitButton) {

                        oPrecedingSubmitButton = p_oElement;

                    }
                
                }

                break;
            

            default:
            
                sId = p_oElement.id;
    
                if (sId) {
    
                    oButton = m_oButtons[sId];
        
                    if (oButton) {

                        bFormContainsYUIButtons = true;
        
                        if (!oButton.get("disabled")) {

                            oSrcElement = oButton.get("srcelement");
    
                            if (!oYUISubmitButton && (oButton.get("type") == "submit" || 
                                (oSrcElement && oSrcElement.type == "submit"))) {

                                oYUISubmitButton = oButton;
                            
                            }
                        
                        }
                        
                    }
                
                }

                break;
    
            }
    
        }
    
    
        if (nCharCode == 13 && ((sNodeName == "INPUT" && (sType == "text" || 
            sType == "password" || sType == "checkbox" || sType == "radio" || 
            sType == "file")) || sNodeName == "SELECT")) {
    
            Dom.getElementsBy(isSubmitButton, "*", this);
    
    
            if (oPrecedingSubmitButton) {
    
                /*
                     Need to set focus to the first enabled submit button
                     to make sure that IE includes its name and value 
                     in the form's data set.
                */
    
                oPrecedingSubmitButton.focus();
            
            }
            else if (!oPrecedingSubmitButton && oYUISubmitButton) {
    
				/*
					Need to call "preventDefault" to ensure that the form doesn't end up getting
					submitted twice.
				*/
    
    			Event.preventDefault(p_oEvent);


				if (UA.ie) {
				
					oYUISubmitButton.get("element").fireEvent("onclick");
				
				}
				else {

					oEvent = document.createEvent("HTMLEvents");
					oEvent.initEvent("click", true, true);
			

					if (UA.gecko < 1.9) {
					
						oYUISubmitButton.fireEvent("click", oEvent);
					
					}
					else {

						oYUISubmitButton.get("element").dispatchEvent(oEvent);
					
					}
  
                }

            }
            
        }
    
    };
    
    
    /**
    * @method YAHOO.widget.Button.addHiddenFieldsToForm
    * @description Searches the specified form and adds hidden fields for  
    * instances of YAHOO.widget.Button that are of type "radio," "checkbox," 
    * "menu," and "split."
    * @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-
    * one-html.html#ID-40002357">HTMLFormElement</a>} p_oForm Object reference 
    * for the form to search.
    */
    YAHOO.widget.Button.addHiddenFieldsToForm = function (p_oForm) {
    
        var aButtons = Dom.getElementsByClassName(
                            YAHOO.widget.Button.prototype.CSS_CLASS_NAME, 
                            "*", 
                            p_oForm),
    
            nButtons = aButtons.length,
            oButton,
            sId,
            i;
    
        if (nButtons > 0) {
    
    
            for (i = 0; i < nButtons; i++) {
    
                sId = aButtons[i].id;
    
                if (sId) {
    
                    oButton = m_oButtons[sId];
        
                    if (oButton) {
           
                        oButton.createHiddenFields();
                        
                    }
                
                }
            
            }
    
        }
    
    };
    

    /**
    * @method YAHOO.widget.Button.getButton
    * @description Returns a button with the specified id.
    * @param {String} p_sId String specifying the id of the root node of the 
    * HTML element representing the button to be retrieved.
    * @return {YAHOO.widget.Button}
    */
    YAHOO.widget.Button.getButton = function (p_sId) {

		return m_oButtons[p_sId];

    };
    
    
    // Events
    
    
    /**
    * @event focus
    * @description Fires when the menu item receives focus.  Passes back a  
    * single object representing the original DOM event object passed back by 
    * the event utility (YAHOO.util.Event) when the event was fired.  See 
    * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a> 
    * for more information on listening for this event.
    * @type YAHOO.util.CustomEvent
    */
    
    
    /**
    * @event blur
    * @description Fires when the menu item loses the input focus.  Passes back  
    * a single object representing the original DOM event object passed back by 
    * the event utility (YAHOO.util.Event) when the event was fired.  See 
    * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a> for  
    * more information on listening for this event.
    * @type YAHOO.util.CustomEvent
    */
    
    
    /**
    * @event option
    * @description Fires when the user invokes the button's option.  Passes 
    * back a single object representing the original DOM event (either 
    * "mousedown" or "keydown") that caused the "option" event to fire.  See 
    * <a href="YAHOO.util.Element.html#addListener">Element.addListener</a> 
    * for more information on listening for this event.
    * @type YAHOO.util.CustomEvent
    */

})();
(function () {

    // Shorthard for utilities
    
    var Dom = YAHOO.util.Dom,
        Event = YAHOO.util.Event,
        Lang = YAHOO.lang,
        Button = YAHOO.widget.Button,  
    
        // Private collection of radio buttons
    
        m_oButtons = {};



    /**
    * The ButtonGroup class creates a set of buttons that are mutually 
    * exclusive; checking one button in the set will uncheck all others in the 
    * button group.
    * @param {String} p_oElement String specifying the id attribute of the 
    * <code>&#60;div&#62;</code> element of the button group.
    * @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
    * level-one-html.html#ID-22445964">HTMLDivElement</a>} p_oElement Object 
    * specifying the <code>&#60;div&#62;</code> element of the button group.
    * @param {Object} p_oElement Object literal specifying a set of 
    * configuration attributes used to create the button group.
    * @param {Object} p_oAttributes Optional. Object literal specifying a set 
    * of configuration attributes used to create the button group.
    * @namespace YAHOO.widget
    * @class ButtonGroup
    * @constructor
    * @extends YAHOO.util.Element
    */
    YAHOO.widget.ButtonGroup = function (p_oElement, p_oAttributes) {
    
        var fnSuperClass = YAHOO.widget.ButtonGroup.superclass.constructor,
            sNodeName,
            oElement,
            sId;
    
        if (arguments.length == 1 && !Lang.isString(p_oElement) && 
            !p_oElement.nodeName) {
    
            if (!p_oElement.id) {
    
                sId = Dom.generateId();
    
                p_oElement.id = sId;
    
    
            }
    
    
    
            fnSuperClass.call(this, (this._createGroupElement()), p_oElement);
    
        }
        else if (Lang.isString(p_oElement)) {
    
            oElement = Dom.get(p_oElement);
    
            if (oElement) {
            
                if (oElement.nodeName.toUpperCase() == this.NODE_NAME) {
    
            
                    fnSuperClass.call(this, oElement, p_oAttributes);
    
                }
    
            }
        
        }
        else {
    
            sNodeName = p_oElement.nodeName.toUpperCase();
    
            if (sNodeName && sNodeName == this.NODE_NAME) {
        
                if (!p_oElement.id) {
        
                    p_oElement.id = Dom.generateId();
        
        
                }
        
        
                fnSuperClass.call(this, p_oElement, p_oAttributes);
    
            }
    
        }
    
    };
    
    
    YAHOO.extend(YAHOO.widget.ButtonGroup, YAHOO.util.Element, {
    
    
        // Protected properties
        
        
        /** 
        * @property _buttons
        * @description Array of buttons in the button group.
        * @default null
        * @protected
        * @type Array
        */
        _buttons: null,
        
        
        
        // Constants
        
        
        /**
        * @property NODE_NAME
        * @description The name of the tag to be used for the button 
        * group's element. 
        * @default "DIV"
        * @final
        * @type String
        */
        NODE_NAME: "DIV",
        
        
        /**
        * @property CSS_CLASS_NAME
        * @description String representing the CSS class(es) to be applied  
        * to the button group's element.
        * @default "yui-buttongroup"
        * @final
        * @type String
        */
        CSS_CLASS_NAME: "yui-buttongroup",
    
    
    
        // Protected methods
        
        
        /**
        * @method _createGroupElement
        * @description Creates the button group's element.
        * @protected
        * @return {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
        * level-one-html.html#ID-22445964">HTMLDivElement</a>}
        */
        _createGroupElement: function () {
        
            var oElement = document.createElement(this.NODE_NAME);
        
            return oElement;
        
        },
        
        
        
        // Protected attribute setter methods
        
        
        /**
        * @method _setDisabled
        * @description Sets the value of the button groups's 
        * "disabled" attribute.
        * @protected
        * @param {Boolean} p_bDisabled Boolean indicating the value for
        * the button group's "disabled" attribute.
        */
        _setDisabled: function (p_bDisabled) {
        
            var nButtons = this.getCount(),
                i;
        
            if (nButtons > 0) {
        
                i = nButtons - 1;
                
                do {
        
                    this._buttons[i].set("disabled", p_bDisabled);
                
                }
                while (i--);
        
            }
        
        },
        
        
        
        // Protected event handlers
        
        
        /**
        * @method _onKeyDown
        * @description "keydown" event handler for the button group.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onKeyDown: function (p_oEvent) {
        
            var oTarget = Event.getTarget(p_oEvent),
                nCharCode = Event.getCharCode(p_oEvent),
                sId = oTarget.parentNode.parentNode.id,
                oButton = m_oButtons[sId],
                nIndex = -1;
        
        
            if (nCharCode == 37 || nCharCode == 38) {
        
                nIndex = (oButton.index === 0) ? 
                            (this._buttons.length - 1) : (oButton.index - 1);
            
            }
            else if (nCharCode == 39 || nCharCode == 40) {
        
                nIndex = (oButton.index === (this._buttons.length - 1)) ? 
                            0 : (oButton.index + 1);
        
            }
        
        
            if (nIndex > -1) {
        
                this.check(nIndex);
                this.getButton(nIndex).focus();
            
            }        
        
        },
        
        
        /**
        * @method _onAppendTo
        * @description "appendTo" event handler for the button group.
        * @protected
        * @param {Event} p_oEvent Object representing the event that was fired.
        */
        _onAppendTo: function (p_oEvent) {
        
            var aButtons = this._buttons,
                nButtons = aButtons.length,
                i;
        
            for (i = 0; i < nButtons; i++) {
        
                aButtons[i].appendTo(this.get("element"));
        
            }
        
        },
        
        
        /**
        * @method _onButtonCheckedChange
        * @description "checkedChange" event handler for each button in the 
        * button group.
        * @protected
        * @param {Event} p_oEvent Object representing the event that was fired.
        * @param {<a href="YAHOO.widget.Button.html">YAHOO.widget.Button</a>}  
        * p_oButton Object representing the button that fired the event.
        */
        _onButtonCheckedChange: function (p_oEvent, p_oButton) {
        
            var bChecked = p_oEvent.newValue,
                oCheckedButton = this.get("checkedButton");
        
            if (bChecked && oCheckedButton != p_oButton) {
        
                if (oCheckedButton) {
        
                    oCheckedButton.set("checked", false, true);
        
                }
        
                this.set("checkedButton", p_oButton);
                this.set("value", p_oButton.get("value"));
        
            }
            else if (oCheckedButton && !oCheckedButton.set("checked")) {
        
                oCheckedButton.set("checked", true, true);
        
            }
           
        },
        
        
        
        // Public methods
        
        
        /**
        * @method init
        * @description The ButtonGroup class's initialization method.
        * @param {String} p_oElement String specifying the id attribute of the 
        * <code>&#60;div&#62;</code> element of the button group.
        * @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
        * level-one-html.html#ID-22445964">HTMLDivElement</a>} p_oElement Object 
        * specifying the <code>&#60;div&#62;</code> element of the button group.
        * @param {Object} p_oElement Object literal specifying a set of  
        * configuration attributes used to create the button group.
        * @param {Object} p_oAttributes Optional. Object literal specifying a
        * set of configuration attributes used to create the button group.
        */
        init: function (p_oElement, p_oAttributes) {
        
            this._buttons = [];
        
            YAHOO.widget.ButtonGroup.superclass.init.call(this, p_oElement, 
                    p_oAttributes);
        
            this.addClass(this.CSS_CLASS_NAME);
        
        
            var aButtons = this.getElementsByClassName("yui-radio-button");
        
        
            if (aButtons.length > 0) {
        
        
                this.addButtons(aButtons);
        
            }
        
        
        
            function isRadioButton(p_oElement) {
        
                return (p_oElement.type == "radio");
        
            }
        
            aButtons = 
                Dom.getElementsBy(isRadioButton, "input", this.get("element"));
        
        
            if (aButtons.length > 0) {
        
        
                this.addButtons(aButtons);
        
            }
        
            this.on("keydown", this._onKeyDown);
            this.on("appendTo", this._onAppendTo);
        

            var oContainer = this.get("container");

            if (oContainer) {
        
                if (Lang.isString(oContainer)) {
        
                    Event.onContentReady(oContainer, function () {
        
                        this.appendTo(oContainer);            
                    
                    }, null, this);
        
                }
                else {
        
                    this.appendTo(oContainer);
        
                }
        
            }
        
        
        
        },
        
        
        /**
        * @method initAttributes
        * @description Initializes all of the configuration attributes used to  
        * create the button group.
        * @param {Object} p_oAttributes Object literal specifying a set of 
        * configuration attributes used to create the button group.
        */
        initAttributes: function (p_oAttributes) {
        
            var oAttributes = p_oAttributes || {};
        
            YAHOO.widget.ButtonGroup.superclass.initAttributes.call(
                this, oAttributes);
        
        
            /**
            * @attribute name
            * @description String specifying the name for the button group.  
            * This name will be applied to each button in the button group.
            * @default null
            * @type String
            */
            this.setAttributeConfig("name", {
        
                value: oAttributes.name,
                validator: Lang.isString
        
            });
        
        
            /**
            * @attribute disabled
            * @description Boolean indicating if the button group should be 
            * disabled.  Disabling the button group will disable each button 
            * in the button group.  Disabled buttons are dimmed and will not 
            * respond to user input or fire events.
            * @default false
            * @type Boolean
            */
            this.setAttributeConfig("disabled", {
        
                value: (oAttributes.disabled || false),
                validator: Lang.isBoolean,
                method: this._setDisabled
        
            });
        
        
            /**
            * @attribute value
            * @description Object specifying the value for the button group.
            * @default null
            * @type Object
            */
            this.setAttributeConfig("value", {
        
                value: oAttributes.value
        
            });
        
        
            /**
            * @attribute container
            * @description HTML element reference or string specifying the id 
            * attribute of the HTML element that the button group's markup
            * should be rendered into.
            * @type <a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
            * level-one-html.html#ID-58190037">HTMLElement</a>|String
            * @default null
            */
            this.setAttributeConfig("container", {
        
                value: oAttributes.container,
                writeOnce: true
        
            });
        
        
            /**
            * @attribute checkedButton
            * @description Reference for the button in the button group that 
            * is checked.
            * @type {<a href="YAHOO.widget.Button.html">YAHOO.widget.Button</a>}
            * @default null
            */
            this.setAttributeConfig("checkedButton", {
        
                value: null
        
            });
        
        },
        
        
        /**
        * @method addButton
        * @description Adds the button to the button group.
        * @param {<a href="YAHOO.widget.Button.html">YAHOO.widget.Button</a>}  
        * p_oButton Object reference for the <a href="YAHOO.widget.Button.html">
        * YAHOO.widget.Button</a> instance to be added to the button group.
        * @param {String} p_oButton String specifying the id attribute of the 
        * <code>&#60;input&#62;</code> or <code>&#60;span&#62;</code> element 
        * to be used to create the button to be added to the button group.
        * @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
        * level-one-html.html#ID-6043025">HTMLInputElement</a>|<a href="
        * http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-html.html#
        * ID-33759296">HTMLElement</a>} p_oButton Object reference for the 
        * <code>&#60;input&#62;</code> or <code>&#60;span&#62;</code> element 
        * to be used to create the button to be added to the button group.
        * @param {Object} p_oButton Object literal specifying a set of 
        * <a href="YAHOO.widget.Button.html">YAHOO.widget.Button</a> 
        * configuration attributes used to configure the button to be added to 
        * the button group.
        * @return {<a href="YAHOO.widget.Button.html">YAHOO.widget.Button</a>} 
        */
        addButton: function (p_oButton) {
        
            var oButton,
                oButtonElement,
                oGroupElement,
                nIndex,
                sButtonName,
                sGroupName;
        
        
            if (p_oButton instanceof Button && 
                p_oButton.get("type") == "radio") {
        
                oButton = p_oButton;
        
            }
            else if (!Lang.isString(p_oButton) && !p_oButton.nodeName) {
        
                p_oButton.type = "radio";
        
                oButton = new Button(p_oButton);

            }
            else {
        
                oButton = new Button(p_oButton, { type: "radio" });
        
            }
        
        
            if (oButton) {
        
                nIndex = this._buttons.length;
                sButtonName = oButton.get("name");
                sGroupName = this.get("name");
        
                oButton.index = nIndex;
        
                this._buttons[nIndex] = oButton;
                m_oButtons[oButton.get("id")] = oButton;
        
        
                if (sButtonName != sGroupName) {
        
                    oButton.set("name", sGroupName);
                
                }
        
        
                if (this.get("disabled")) {
        
                    oButton.set("disabled", true);
        
                }
        
        
                if (oButton.get("checked")) {
        
                    this.set("checkedButton", oButton);
        
                }

                
                oButtonElement = oButton.get("element");
                oGroupElement = this.get("element");
                
                if (oButtonElement.parentNode != oGroupElement) {
                
                    oGroupElement.appendChild(oButtonElement);
                
                }
        
                
                oButton.on("checkedChange", 
                    this._onButtonCheckedChange, oButton, this);
        
        
            }

			return oButton;
        
        },
        
        
        /**
        * @method addButtons
        * @description Adds the array of buttons to the button group.
        * @param {Array} p_aButtons Array of <a href="YAHOO.widget.Button.html">
        * YAHOO.widget.Button</a> instances to be added 
        * to the button group.
        * @param {Array} p_aButtons Array of strings specifying the id 
        * attribute of the <code>&#60;input&#62;</code> or <code>&#60;span&#62;
        * </code> elements to be used to create the buttons to be added to the 
        * button group.
        * @param {Array} p_aButtons Array of object references for the 
        * <code>&#60;input&#62;</code> or <code>&#60;span&#62;</code> elements 
        * to be used to create the buttons to be added to the button group.
        * @param {Array} p_aButtons Array of object literals, each containing
        * a set of <a href="YAHOO.widget.Button.html">YAHOO.widget.Button</a>  
        * configuration attributes used to configure each button to be added 
        * to the button group.
        * @return {Array}
        */
        addButtons: function (p_aButtons) {
    
            var nButtons,
                oButton,
                aButtons,
                i;
        
            if (Lang.isArray(p_aButtons)) {
            
                nButtons = p_aButtons.length;
                aButtons = [];
        
                if (nButtons > 0) {
        
                    for (i = 0; i < nButtons; i++) {
        
                        oButton = this.addButton(p_aButtons[i]);
                        
                        if (oButton) {
        
                            aButtons[aButtons.length] = oButton;
        
                        }
                    
                    }
                
                }
        
            }

			return aButtons;
        
        },
        
        
        /**
        * @method removeButton
        * @description Removes the button at the specified index from the 
        * button group.
        * @param {Number} p_nIndex Number specifying the index of the button 
        * to be removed from the button group.
        */
        removeButton: function (p_nIndex) {
        
            var oButton = this.getButton(p_nIndex),
                nButtons,
                i;
            
            if (oButton) {
        
        
                this._buttons.splice(p_nIndex, 1);
                delete m_oButtons[oButton.get("id")];
        
                oButton.removeListener("checkedChange", 
                    this._onButtonCheckedChange);

                oButton.destroy();
        
        
                nButtons = this._buttons.length;
                
                if (nButtons > 0) {
        
                    i = this._buttons.length - 1;
                    
                    do {
        
                        this._buttons[i].index = i;
        
                    }
                    while (i--);
                
                }
        
        
            }
        
        },
        
        
        /**
        * @method getButton
        * @description Returns the button at the specified index.
        * @param {Number} p_nIndex The index of the button to retrieve from the 
        * button group.
        * @return {<a href="YAHOO.widget.Button.html">YAHOO.widget.Button</a>}
        */
        getButton: function (p_nIndex) {
        
            return this._buttons[p_nIndex];
        
        },
        
        
        /**
        * @method getButtons
        * @description Returns an array of the buttons in the button group.
        * @return {Array}
        */
        getButtons: function () {
        
            return this._buttons;
        
        },
        
        
        /**
        * @method getCount
        * @description Returns the number of buttons in the button group.
        * @return {Number}
        */
        getCount: function () {
        
            return this._buttons.length;
        
        },
        
        
        /**
        * @method focus
        * @description Sets focus to the button at the specified index.
        * @param {Number} p_nIndex Number indicating the index of the button 
        * to focus. 
        */
        focus: function (p_nIndex) {
        
            var oButton,
                nButtons,
                i;
        
            if (Lang.isNumber(p_nIndex)) {
        
                oButton = this._buttons[p_nIndex];
                
                if (oButton) {
        
                    oButton.focus();
        
                }
            
            }
            else {
        
                nButtons = this.getCount();
        
                for (i = 0; i < nButtons; i++) {
        
                    oButton = this._buttons[i];
        
                    if (!oButton.get("disabled")) {
        
                        oButton.focus();
                        break;
        
                    }
        
                }
        
            }
        
        },
        
        
        /**
        * @method check
        * @description Checks the button at the specified index.
        * @param {Number} p_nIndex Number indicating the index of the button 
        * to check. 
        */
        check: function (p_nIndex) {
        
            var oButton = this.getButton(p_nIndex);
            
            if (oButton) {
        
                oButton.set("checked", true);
            
            }
        
        },
        
        
        /**
        * @method destroy
        * @description Removes the button group's element from its parent 
        * element and removes all event handlers.
        */
        destroy: function () {
        
        
            var nButtons = this._buttons.length,
                oElement = this.get("element"),
                oParentNode = oElement.parentNode,
                i;
            
            if (nButtons > 0) {
        
                i = this._buttons.length - 1;
        
                do {
        
                    this._buttons[i].destroy();
        
                }
                while (i--);
            
            }
        
        
            Event.purgeElement(oElement);
            
        
            oParentNode.removeChild(oElement);
        
        },
        
        
        /**
        * @method toString
        * @description Returns a string representing the button group.
        * @return {String}
        */
        toString: function () {
        
            return ("ButtonGroup " + this.get("id"));
        
        }
    
    });

})();
YAHOO.register("button", YAHOO.widget.Button, {version: "2.6.0", build: "1321"});
/*
Copyright (c) 2008, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.6.0
*/
/**
 * The Connection Manager provides a simplified interface to the XMLHttpRequest
 * object.  It handles cross-browser instantiantion of XMLHttpRequest, negotiates the
 * interactive states and server response, returning the results to a pre-defined
 * callback you create.
 *
 * @namespace YAHOO.util
 * @module connection
 * @requires yahoo
 * @requires event
 */

/**
 * The Connection Manager singleton provides methods for creating and managing
 * asynchronous transactions.
 *
 * @class Connect
 */

YAHOO.util.Connect =
{
  /**
   * @description Array of MSFT ActiveX ids for XMLHttpRequest.
   * @property _msxml_progid
   * @private
   * @static
   * @type array
   */
	_msxml_progid:[
		'Microsoft.XMLHTTP',
		'MSXML2.XMLHTTP.3.0',
		'MSXML2.XMLHTTP'
		],

  /**
   * @description Object literal of HTTP header(s)
   * @property _http_header
   * @private
   * @static
   * @type object
   */
	_http_headers:{},

  /**
   * @description Determines if HTTP headers are set.
   * @property _has_http_headers
   * @private
   * @static
   * @type boolean
   */
	_has_http_headers:false,

 /**
  * @description Determines if a default header of
  * Content-Type of 'application/x-www-form-urlencoded'
  * will be added to any client HTTP headers sent for POST
  * transactions.
  * @property _use_default_post_header
  * @private
  * @static
  * @type boolean
  */
    _use_default_post_header:true,

 /**
  * @description The default header used for POST transactions.
  * @property _default_post_header
  * @private
  * @static
  * @type boolean
  */
    _default_post_header:'application/x-www-form-urlencoded; charset=UTF-8',

 /**
  * @description The default header used for transactions involving the
  * use of HTML forms.
  * @property _default_form_header
  * @private
  * @static
  * @type boolean
  */
    _default_form_header:'application/x-www-form-urlencoded',

 /**
  * @description Determines if a default header of
  * 'X-Requested-With: XMLHttpRequest'
  * will be added to each transaction.
  * @property _use_default_xhr_header
  * @private
  * @static
  * @type boolean
  */
    _use_default_xhr_header:true,

 /**
  * @description The default header value for the label
  * "X-Requested-With".  This is sent with each
  * transaction, by default, to identify the
  * request as being made by YUI Connection Manager.
  * @property _default_xhr_header
  * @private
  * @static
  * @type boolean
  */
    _default_xhr_header:'XMLHttpRequest',

 /**
  * @description Determines if custom, default headers
  * are set for each transaction.
  * @property _has_default_header
  * @private
  * @static
  * @type boolean
  */
    _has_default_headers:true,

 /**
  * @description Determines if custom, default headers
  * are set for each transaction.
  * @property _has_default_header
  * @private
  * @static
  * @type boolean
  */
    _default_headers:{},

 /**
  * @description Property modified by setForm() to determine if the data
  * should be submitted as an HTML form.
  * @property _isFormSubmit
  * @private
  * @static
  * @type boolean
  */
    _isFormSubmit:false,

 /**
  * @description Property modified by setForm() to determine if a file(s)
  * upload is expected.
  * @property _isFileUpload
  * @private
  * @static
  * @type boolean
  */
    _isFileUpload:false,

 /**
  * @description Property modified by setForm() to set a reference to the HTML
  * form node if the desired action is file upload.
  * @property _formNode
  * @private
  * @static
  * @type object
  */
    _formNode:null,

 /**
  * @description Property modified by setForm() to set the HTML form data
  * for each transaction.
  * @property _sFormData
  * @private
  * @static
  * @type string
  */
    _sFormData:null,

 /**
  * @description Collection of polling references to the polling mechanism in handleReadyState.
  * @property _poll
  * @private
  * @static
  * @type object
  */
    _poll:{},

 /**
  * @description Queue of timeout values for each transaction callback with a defined timeout value.
  * @property _timeOut
  * @private
  * @static
  * @type object
  */
    _timeOut:{},

  /**
   * @description The polling frequency, in milliseconds, for HandleReadyState.
   * when attempting to determine a transaction's XHR readyState.
   * The default is 50 milliseconds.
   * @property _polling_interval
   * @private
   * @static
   * @type int
   */
     _polling_interval:50,

  /**
   * @description A transaction counter that increments the transaction id for each transaction.
   * @property _transaction_id
   * @private
   * @static
   * @type int
   */
     _transaction_id:0,

  /**
   * @description Tracks the name-value pair of the "clicked" submit button if multiple submit
   * buttons are present in an HTML form; and, if YAHOO.util.Event is available.
   * @property _submitElementValue
   * @private
   * @static
   * @type string
   */
	 _submitElementValue:null,

  /**
   * @description Determines whether YAHOO.util.Event is available and returns true or false.
   * If true, an event listener is bound at the document level to trap click events that
   * resolve to a target type of "Submit".  This listener will enable setForm() to determine
   * the clicked "Submit" value in a multi-Submit button, HTML form.
   * @property _hasSubmitListener
   * @private
   * @static
   */
	 _hasSubmitListener:(function()
	 {
		if(YAHOO.util.Event){
			YAHOO.util.Event.addListener(
				document,
				'click',
				function(e){
					var obj = YAHOO.util.Event.getTarget(e);
					if(obj.nodeName.toLowerCase() == 'input' && (obj.type && obj.type.toLowerCase() == 'submit')){
						YAHOO.util.Connect._submitElementValue = encodeURIComponent(obj.name) + "=" + encodeURIComponent(obj.value);
					}
				});
			return true;
	    }
	    return false;
	 })(),

  /**
   * @description Custom event that fires at the start of a transaction
   * @property startEvent
   * @private
   * @static
   * @type CustomEvent
   */
	startEvent: new YAHOO.util.CustomEvent('start'),

  /**
   * @description Custom event that fires when a transaction response has completed.
   * @property completeEvent
   * @private
   * @static
   * @type CustomEvent
   */
	completeEvent: new YAHOO.util.CustomEvent('complete'),

  /**
   * @description Custom event that fires when handleTransactionResponse() determines a
   * response in the HTTP 2xx range.
   * @property successEvent
   * @private
   * @static
   * @type CustomEvent
   */
	successEvent: new YAHOO.util.CustomEvent('success'),

  /**
   * @description Custom event that fires when handleTransactionResponse() determines a
   * response in the HTTP 4xx/5xx range.
   * @property failureEvent
   * @private
   * @static
   * @type CustomEvent
   */
	failureEvent: new YAHOO.util.CustomEvent('failure'),

  /**
   * @description Custom event that fires when handleTransactionResponse() determines a
   * response in the HTTP 4xx/5xx range.
   * @property failureEvent
   * @private
   * @static
   * @type CustomEvent
   */
	uploadEvent: new YAHOO.util.CustomEvent('upload'),

  /**
   * @description Custom event that fires when a transaction is successfully aborted.
   * @property abortEvent
   * @private
   * @static
   * @type CustomEvent
   */
	abortEvent: new YAHOO.util.CustomEvent('abort'),

  /**
   * @description A reference table that maps callback custom events members to its specific
   * event name.
   * @property _customEvents
   * @private
   * @static
   * @type object
   */
	_customEvents:
	{
		onStart:['startEvent', 'start'],
		onComplete:['completeEvent', 'complete'],
		onSuccess:['successEvent', 'success'],
		onFailure:['failureEvent', 'failure'],
		onUpload:['uploadEvent', 'upload'],
		onAbort:['abortEvent', 'abort']
	},

  /**
   * @description Member to add an ActiveX id to the existing xml_progid array.
   * In the event(unlikely) a new ActiveX id is introduced, it can be added
   * without internal code modifications.
   * @method setProgId
   * @public
   * @static
   * @param {string} id The ActiveX id to be added to initialize the XHR object.
   * @return void
   */
	setProgId:function(id)
	{
		this._msxml_progid.unshift(id);
	},

  /**
   * @description Member to override the default POST header.
   * @method setDefaultPostHeader
   * @public
   * @static
   * @param {boolean} b Set and use default header - true or false .
   * @return void
   */
	setDefaultPostHeader:function(b)
	{
		if(typeof b == 'string'){
			this._default_post_header = b;
		}
		else if(typeof b == 'boolean'){
			this._use_default_post_header = b;
		}
	},

  /**
   * @description Member to override the default transaction header..
   * @method setDefaultXhrHeader
   * @public
   * @static
   * @param {boolean} b Set and use default header - true or false .
   * @return void
   */
	setDefaultXhrHeader:function(b)
	{
		if(typeof b == 'string'){
			this._default_xhr_header = b;
		}
		else{
			this._use_default_xhr_header = b;
		}
	},

  /**
   * @description Member to modify the default polling interval.
   * @method setPollingInterval
   * @public
   * @static
   * @param {int} i The polling interval in milliseconds.
   * @return void
   */
	setPollingInterval:function(i)
	{
		if(typeof i == 'number' && isFinite(i)){
			this._polling_interval = i;
		}
	},

  /**
   * @description Instantiates a XMLHttpRequest object and returns an object with two properties:
   * the XMLHttpRequest instance and the transaction id.
   * @method createXhrObject
   * @private
   * @static
   * @param {int} transactionId Property containing the transaction id for this transaction.
   * @return object
   */
	createXhrObject:function(transactionId)
	{
		var obj,http;
		try
		{
			// Instantiates XMLHttpRequest in non-IE browsers and assigns to http.
			http = new XMLHttpRequest();
			//  Object literal with http and tId properties
			obj = { conn:http, tId:transactionId };
		}
		catch(e)
		{
			for(var i=0; i<this._msxml_progid.length; ++i){
				try
				{
					// Instantiates XMLHttpRequest for IE and assign to http
					http = new ActiveXObject(this._msxml_progid[i]);
					//  Object literal with conn and tId properties
					obj = { conn:http, tId:transactionId };
					break;
				}
				catch(e2){}
			}
		}
		finally
		{
			return obj;
		}
	},

  /**
   * @description This method is called by asyncRequest to create a
   * valid connection object for the transaction.  It also passes a
   * transaction id and increments the transaction id counter.
   * @method getConnectionObject
   * @private
   * @static
   * @return {object}
   */
	getConnectionObject:function(isFileUpload)
	{
		var o;
		var tId = this._transaction_id;

		try
		{
			if(!isFileUpload){
				o = this.createXhrObject(tId);
			}
			else{
				o = {};
				o.tId = tId;
				o.isUpload = true;
			}

			if(o){
				this._transaction_id++;
			}
		}
		catch(e){}
		finally
		{
			return o;
		}
	},

  /**
   * @description Method for initiating an asynchronous request via the XHR object.
   * @method asyncRequest
   * @public
   * @static
   * @param {string} method HTTP transaction method
   * @param {string} uri Fully qualified path of resource
   * @param {callback} callback User-defined callback function or object
   * @param {string} postData POST body
   * @return {object} Returns the connection object
   */
	asyncRequest:function(method, uri, callback, postData)
	{
		var o = (this._isFileUpload)?this.getConnectionObject(true):this.getConnectionObject();
		var args = (callback && callback.argument)?callback.argument:null;

		if(!o){
			return null;
		}
		else{

			// Intialize any transaction-specific custom events, if provided.
			if(callback && callback.customevents){
				this.initCustomEvents(o, callback);
			}

			if(this._isFormSubmit){
				if(this._isFileUpload){
					this.uploadFile(o, callback, uri, postData);
					return o;
				}

				// If the specified HTTP method is GET, setForm() will return an
				// encoded string that is concatenated to the uri to
				// create a querystring.
				if(method.toUpperCase() == 'GET'){
					if(this._sFormData.length !== 0){
						// If the URI already contains a querystring, append an ampersand
						// and then concatenate _sFormData to the URI.
						uri += ((uri.indexOf('?') == -1)?'?':'&') + this._sFormData;
					}
				}
				else if(method.toUpperCase() == 'POST'){
					// If POST data exist in addition to the HTML form data,
					// it will be concatenated to the form data.
					postData = postData?this._sFormData + "&" + postData:this._sFormData;
				}
			}

			if(method.toUpperCase() == 'GET' && (callback && callback.cache === false)){
				// If callback.cache is defined and set to false, a
				// timestamp value will be added to the querystring.
				uri += ((uri.indexOf('?') == -1)?'?':'&') + "rnd=" + new Date().valueOf().toString();
			}

			o.conn.open(method, uri, true);

			// Each transaction will automatically include a custom header of
			// "X-Requested-With: XMLHttpRequest" to identify the request as
			// having originated from Connection Manager.
			if(this._use_default_xhr_header){
				if(!this._default_headers['X-Requested-With']){
					this.initHeader('X-Requested-With', this._default_xhr_header, true);
				}
			}

			//If the transaction method is POST and the POST header value is set to true
			//or a custom value, initalize the Content-Type header to this value.
			if((method.toUpperCase() === 'POST' && this._use_default_post_header) && this._isFormSubmit === false){
				this.initHeader('Content-Type', this._default_post_header);
			}

			//Initialize all default and custom HTTP headers,
			if(this._has_default_headers || this._has_http_headers){
				this.setHeader(o);
			}

			this.handleReadyState(o, callback);
			o.conn.send(postData || '');


			// Reset the HTML form data and state properties as
			// soon as the data are submitted.
			if(this._isFormSubmit === true){
				this.resetFormState();
			}

			// Fire global custom event -- startEvent
			this.startEvent.fire(o, args);

			if(o.startEvent){
				// Fire transaction custom event -- startEvent
				o.startEvent.fire(o, args);
			}

			return o;
		}
	},

  /**
   * @description This method creates and subscribes custom events,
   * specific to each transaction
   * @method initCustomEvents
   * @private
   * @static
   * @param {object} o The connection object
   * @param {callback} callback The user-defined callback object
   * @return {void}
   */
	initCustomEvents:function(o, callback)
	{
		var prop;
		// Enumerate through callback.customevents members and bind/subscribe
		// events that match in the _customEvents table.
		for(prop in callback.customevents){
			if(this._customEvents[prop][0]){
				// Create the custom event
				o[this._customEvents[prop][0]] = new YAHOO.util.CustomEvent(this._customEvents[prop][1], (callback.scope)?callback.scope:null);

				// Subscribe the custom event
				o[this._customEvents[prop][0]].subscribe(callback.customevents[prop]);
			}
		}
	},

  /**
   * @description This method serves as a timer that polls the XHR object's readyState
   * property during a transaction, instead of binding a callback to the
   * onreadystatechange event.  Upon readyState 4, handleTransactionResponse
   * will process the response, and the timer will be cleared.
   * @method handleReadyState
   * @private
   * @static
   * @param {object} o The connection object
   * @param {callback} callback The user-defined callback object
   * @return {void}
   */

    handleReadyState:function(o, callback)

    {
		var oConn = this;
		var args = (callback && callback.argument)?callback.argument:null;

		if(callback && callback.timeout){
			this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true); }, callback.timeout);
		}

		this._poll[o.tId] = window.setInterval(
			function(){
				if(o.conn && o.conn.readyState === 4){

					// Clear the polling interval for the transaction
					// and remove the reference from _poll.
					window.clearInterval(oConn._poll[o.tId]);
					delete oConn._poll[o.tId];

					if(callback && callback.timeout){
						window.clearTimeout(oConn._timeOut[o.tId]);
						delete oConn._timeOut[o.tId];
					}

					// Fire global custom event -- completeEvent
					oConn.completeEvent.fire(o, args);

					if(o.completeEvent){
						// Fire transaction custom event -- completeEvent
						o.completeEvent.fire(o, args);
					}

					oConn.handleTransactionResponse(o, callback);
				}
			}
		,this._polling_interval);
    },

  /**
   * @description This method attempts to interpret the server response and
   * determine whether the transaction was successful, or if an error or
   * exception was encountered.
   * @method handleTransactionResponse
   * @private
   * @static
   * @param {object} o The connection object
   * @param {object} callback The user-defined callback object
   * @param {boolean} isAbort Determines if the transaction was terminated via abort().
   * @return {void}
   */
    handleTransactionResponse:function(o, callback, isAbort)
    {
		var httpStatus, responseObject;
		var args = (callback && callback.argument)?callback.argument:null;

		try
		{
			if(o.conn.status !== undefined && o.conn.status !== 0){
				httpStatus = o.conn.status;
			}
			else{
				httpStatus = 13030;
			}
		}
		catch(e){

			 // 13030 is a custom code to indicate the condition -- in Mozilla/FF --
			 // when the XHR object's status and statusText properties are
			 // unavailable, and a query attempt throws an exception.
			httpStatus = 13030;
		}

		if(httpStatus >= 200 && httpStatus < 300 || httpStatus === 1223){
			responseObject = this.createResponseObject(o, args);
			if(callback && callback.success){
				if(!callback.scope){
					callback.success(responseObject);
				}
				else{
					// If a scope property is defined, the callback will be fired from
					// the context of the object.
					callback.success.apply(callback.scope, [responseObject]);
				}
			}

			// Fire global custom event -- successEvent
			this.successEvent.fire(responseObject);

			if(o.successEvent){
				// Fire transaction custom event -- successEvent
				o.successEvent.fire(responseObject);
			}
		}
		else{
			switch(httpStatus){
				// The following cases are wininet.dll error codes that may be encountered.
				case 12002: // Server timeout
				case 12029: // 12029 to 12031 correspond to dropped connections.
				case 12030:
				case 12031:
				case 12152: // Connection closed by server.
				case 13030: // See above comments for variable status.
					responseObject = this.createExceptionObject(o.tId, args, (isAbort?isAbort:false));
					if(callback && callback.failure){
						if(!callback.scope){
							callback.failure(responseObject);
						}
						else{
							callback.failure.apply(callback.scope, [responseObject]);
						}
					}

					break;
				default:
					responseObject = this.createResponseObject(o, args);
					if(callback && callback.failure){
						if(!callback.scope){
							callback.failure(responseObject);
						}
						else{
							callback.failure.apply(callback.scope, [responseObject]);
						}
					}
			}

			// Fire global custom event -- failureEvent
			this.failureEvent.fire(responseObject);

			if(o.failureEvent){
				// Fire transaction custom event -- failureEvent
				o.failureEvent.fire(responseObject);
			}

		}

		this.releaseObject(o);
		responseObject = null;
    },

  /**
   * @description This method evaluates the server response, creates and returns the results via
   * its properties.  Success and failure cases will differ in the response
   * object's property values.
   * @method createResponseObject
   * @private
   * @static
   * @param {object} o The connection object
   * @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
   * @return {object}
   */
    createResponseObject:function(o, callbackArg)
    {
		var obj = {};
		var headerObj = {};

		try
		{
			var headerStr = o.conn.getAllResponseHeaders();
			var header = headerStr.split('\n');
			for(var i=0; i<header.length; i++){
				var delimitPos = header[i].indexOf(':');
				if(delimitPos != -1){
					headerObj[header[i].substring(0,delimitPos)] = header[i].substring(delimitPos+2);
				}
			}
		}
		catch(e){}

		obj.tId = o.tId;
		// Normalize IE's response to HTTP 204 when Win error 1223.
		obj.status = (o.conn.status == 1223)?204:o.conn.status;
		// Normalize IE's statusText to "No Content" instead of "Unknown".
		obj.statusText = (o.conn.status == 1223)?"No Content":o.conn.statusText;
		obj.getResponseHeader = headerObj;
		obj.getAllResponseHeaders = headerStr;
		obj.responseText = o.conn.responseText;
		obj.responseXML = o.conn.responseXML;

		if(callbackArg){
			obj.argument = callbackArg;
		}

		return obj;
    },

  /**
   * @description If a transaction cannot be completed due to dropped or closed connections,
   * there may be not be enough information to build a full response object.
   * The failure callback will be fired and this specific condition can be identified
   * by a status property value of 0.
   *
   * If an abort was successful, the status property will report a value of -1.
   *
   * @method createExceptionObject
   * @private
   * @static
   * @param {int} tId The Transaction Id
   * @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
   * @param {boolean} isAbort Determines if the exception case is caused by a transaction abort
   * @return {object}
   */
    createExceptionObject:function(tId, callbackArg, isAbort)
    {
		var COMM_CODE = 0;
		var COMM_ERROR = 'communication failure';
		var ABORT_CODE = -1;
		var ABORT_ERROR = 'transaction aborted';

		var obj = {};

		obj.tId = tId;
		if(isAbort){
			obj.status = ABORT_CODE;
			obj.statusText = ABORT_ERROR;
		}
		else{
			obj.status = COMM_CODE;
			obj.statusText = COMM_ERROR;
		}

		if(callbackArg){
			obj.argument = callbackArg;
		}

		return obj;
    },

  /**
   * @description Method that initializes the custom HTTP headers for the each transaction.
   * @method initHeader
   * @public
   * @static
   * @param {string} label The HTTP header label
   * @param {string} value The HTTP header value
   * @param {string} isDefault Determines if the specific header is a default header
   * automatically sent with each transaction.
   * @return {void}
   */
	initHeader:function(label, value, isDefault)
	{
		var headerObj = (isDefault)?this._default_headers:this._http_headers;
		headerObj[label] = value;

		if(isDefault){
			this._has_default_headers = true;
		}
		else{
			this._has_http_headers = true;
		}
	},


  /**
   * @description Accessor that sets the HTTP headers for each transaction.
   * @method setHeader
   * @private
   * @static
   * @param {object} o The connection object for the transaction.
   * @return {void}
   */
	setHeader:function(o)
	{
		var prop;
		if(this._has_default_headers){
			for(prop in this._default_headers){
				if(YAHOO.lang.hasOwnProperty(this._default_headers, prop)){
					o.conn.setRequestHeader(prop, this._default_headers[prop]);
				}
			}
		}

		if(this._has_http_headers){
			for(prop in this._http_headers){
				if(YAHOO.lang.hasOwnProperty(this._http_headers, prop)){
					o.conn.setRequestHeader(prop, this._http_headers[prop]);
				}
			}
			delete this._http_headers;

			this._http_headers = {};
			this._has_http_headers = false;
		}
	},

  /**
   * @description Resets the default HTTP headers object
   * @method resetDefaultHeaders
   * @public
   * @static
   * @return {void}
   */
	resetDefaultHeaders:function(){
		delete this._default_headers;
		this._default_headers = {};
		this._has_default_headers = false;
	},

  /**
   * @description This method assembles the form label and value pairs and
   * constructs an encoded string.
   * asyncRequest() will automatically initialize the transaction with a
   * a HTTP header Content-Type of application/x-www-form-urlencoded.
   * @method setForm
   * @public
   * @static
   * @param {string || object} form id or name attribute, or form object.
   * @param {boolean} optional enable file upload.
   * @param {boolean} optional enable file upload over SSL in IE only.
   * @return {string} string of the HTML form field name and value pairs..
   */
	setForm:function(formId, isUpload, secureUri)
	{
        var oForm, oElement, oName, oValue, oDisabled,
            hasSubmit = false,
            data = [], item = 0,
            i,len,j,jlen,opt;

		this.resetFormState();

		if(typeof formId == 'string'){
			// Determine if the argument is a form id or a form name.
			// Note form name usage is deprecated by supported
			// here for legacy reasons.
			oForm = (document.getElementById(formId) || document.forms[formId]);
		}
		else if(typeof formId == 'object'){
			// Treat argument as an HTML form object.
			oForm = formId;
		}
		else{
			return;
		}

		// If the isUpload argument is true, setForm will call createFrame to initialize
		// an iframe as the form target.
		//
		// The argument secureURI is also required by IE in SSL environments
		// where the secureURI string is a fully qualified HTTP path, used to set the source
		// of the iframe, to a stub resource in the same domain.
		if(isUpload){

			// Create iframe in preparation for file upload.
			this.createFrame(secureUri?secureUri:null);

			// Set form reference and file upload properties to true.
			this._isFormSubmit = true;
			this._isFileUpload = true;
			this._formNode = oForm;

			return;

		}

		// Iterate over the form elements collection to construct the
		// label-value pairs.
		for (i=0,len=oForm.elements.length; i<len; ++i){
			oElement  = oForm.elements[i];
			oDisabled = oElement.disabled;
            oName     = oElement.name;

			// Do not submit fields that are disabled or
			// do not have a name attribute value.
			if(!oDisabled && oName)
			{
                oName  = encodeURIComponent(oName)+'=';
                oValue = encodeURIComponent(oElement.value);

				switch(oElement.type)
				{
                    // Safari, Opera, FF all default opt.value from .text if
                    // value attribute not specified in markup
					case 'select-one':
                        if (oElement.selectedIndex > -1) {
                            opt = oElement.options[oElement.selectedIndex];
                            data[item++] = oName + encodeURIComponent(
                                (opt.attributes.value && opt.attributes.value.specified) ? opt.value : opt.text);
                        }
                        break;
					case 'select-multiple':
                        if (oElement.selectedIndex > -1) {
                            for(j=oElement.selectedIndex, jlen=oElement.options.length; j<jlen; ++j){
                                opt = oElement.options[j];
                                if (opt.selected) {
                                    data[item++] = oName + encodeURIComponent(
                                        (opt.attributes.value && opt.attributes.value.specified) ? opt.value : opt.text);
                                }
                            }
                        }
						break;
					case 'radio':
					case 'checkbox':
						if(oElement.checked){
                            data[item++] = oName + oValue;
						}
						break;
					case 'file':
						// stub case as XMLHttpRequest will only send the file path as a string.
					case undefined:
						// stub case for fieldset element which returns undefined.
					case 'reset':
						// stub case for input type reset button.
					case 'button':
						// stub case for input type button elements.
						break;
					case 'submit':
						if(hasSubmit === false){
							if(this._hasSubmitListener && this._submitElementValue){
                                data[item++] = this._submitElementValue;
							}
							else{
                                data[item++] = oName + oValue;
							}

							hasSubmit = true;
						}
						break;
					default:
                        data[item++] = oName + oValue;
				}
			}
		}

		this._isFormSubmit = true;
		this._sFormData = data.join('&');


		this.initHeader('Content-Type', this._default_form_header);

		return this._sFormData;
	},

  /**
   * @description Resets HTML form properties when an HTML form or HTML form
   * with file upload transaction is sent.
   * @method resetFormState
   * @private
   * @static
   * @return {void}
   */
	resetFormState:function(){
		this._isFormSubmit = false;
		this._isFileUpload = false;
		this._formNode = null;
		this._sFormData = "";
	},

  /**
   * @description Creates an iframe to be used for form file uploads.  It is remove from the
   * document upon completion of the upload transaction.
   * @method createFrame
   * @private
   * @static
   * @param {string} optional qualified path of iframe resource for SSL in IE.
   * @return {void}
   */
	createFrame:function(secureUri){

		// IE does not allow the setting of id and name attributes as object
		// properties via createElement().  A different iframe creation
		// pattern is required for IE.
		var frameId = 'yuiIO' + this._transaction_id;
		var io;
		if(YAHOO.env.ua.ie){
			io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');

			// IE will throw a security exception in an SSL environment if the
			// iframe source is undefined.
			if(typeof secureUri == 'boolean'){
				io.src = 'javascript:false';
			}
		}
		else{
			io = document.createElement('iframe');
			io.id = frameId;
			io.name = frameId;
		}

		io.style.position = 'absolute';
		io.style.top = '-1000px';
		io.style.left = '-1000px';

		document.body.appendChild(io);
	},

  /**
   * @description Parses the POST data and creates hidden form elements
   * for each key-value, and appends them to the HTML form object.
   * @method appendPostData
   * @private
   * @static
   * @param {string} postData The HTTP POST data
   * @return {array} formElements Collection of hidden fields.
   */
	appendPostData:function(postData)
	{
		var formElements = [],
			postMessage = postData.split('&'),
			i, delimitPos;
		for(i=0; i < postMessage.length; i++){
			delimitPos = postMessage[i].indexOf('=');
			if(delimitPos != -1){
				formElements[i] = document.createElement('input');
				formElements[i].type = 'hidden';
				formElements[i].name = decodeURIComponent(postMessage[i].substring(0,delimitPos));
				formElements[i].value = decodeURIComponent(postMessage[i].substring(delimitPos+1));
				this._formNode.appendChild(formElements[i]);
			}
		}

		return formElements;
	},

  /**
   * @description Uploads HTML form, inclusive of files/attachments, using the
   * iframe created in createFrame to facilitate the transaction.
   * @method uploadFile
   * @private
   * @static
   * @param {int} id The transaction id.
   * @param {object} callback User-defined callback object.
   * @param {string} uri Fully qualified path of resource.
   * @param {string} postData POST data to be submitted in addition to HTML form.
   * @return {void}
   */
	uploadFile:function(o, callback, uri, postData){

		// Each iframe has an id prefix of "yuiIO" followed
		// by the unique transaction id.
		var frameId = 'yuiIO' + o.tId,
		    uploadEncoding = 'multipart/form-data',
		    io = document.getElementById(frameId),
		    oConn = this,
			args = (callback && callback.argument)?callback.argument:null,
            oElements,i,prop,obj;

		// Track original HTML form attribute values.
		var rawFormAttributes =
		{
			action:this._formNode.getAttribute('action'),
			method:this._formNode.getAttribute('method'),
			target:this._formNode.getAttribute('target')
		};

		// Initialize the HTML form properties in case they are
		// not defined in the HTML form.
		this._formNode.setAttribute('action', uri);
		this._formNode.setAttribute('method', 'POST');
		this._formNode.setAttribute('target', frameId);

		if(YAHOO.env.ua.ie){
			// IE does not respect property enctype for HTML forms.
			// Instead it uses the property - "encoding".
			this._formNode.setAttribute('encoding', uploadEncoding);
		}
		else{
			this._formNode.setAttribute('enctype', uploadEncoding);
		}

		if(postData){
			oElements = this.appendPostData(postData);
		}

		// Start file upload.
		this._formNode.submit();

		// Fire global custom event -- startEvent
		this.startEvent.fire(o, args);

		if(o.startEvent){
			// Fire transaction custom event -- startEvent
			o.startEvent.fire(o, args);
		}

		// Start polling if a callback is present and the timeout
		// property has been defined.
		if(callback && callback.timeout){
			this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true); }, callback.timeout);
		}

		// Remove HTML elements created by appendPostData
		if(oElements && oElements.length > 0){
			for(i=0; i < oElements.length; i++){
				this._formNode.removeChild(oElements[i]);
			}
		}

		// Restore HTML form attributes to their original
		// values prior to file upload.
		for(prop in rawFormAttributes){
			if(YAHOO.lang.hasOwnProperty(rawFormAttributes, prop)){
				if(rawFormAttributes[prop]){
					this._formNode.setAttribute(prop, rawFormAttributes[prop]);
				}
				else{
					this._formNode.removeAttribute(prop);
				}
			}
		}

		// Reset HTML form state properties.
		this.resetFormState();

		// Create the upload callback handler that fires when the iframe
		// receives the load event.  Subsequently, the event handler is detached
		// and the iframe removed from the document.
		var uploadCallback = function()
		{
			if(callback && callback.timeout){
				window.clearTimeout(oConn._timeOut[o.tId]);
				delete oConn._timeOut[o.tId];
			}

			// Fire global custom event -- completeEvent
			oConn.completeEvent.fire(o, args);

			if(o.completeEvent){
				// Fire transaction custom event -- completeEvent
				o.completeEvent.fire(o, args);
			}

			obj = {
			    tId : o.tId,
			    argument : callback.argument
            };

			try
			{
				// responseText and responseXML will be populated with the same data from the iframe.
				// Since the HTTP headers cannot be read from the iframe
				obj.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:io.contentWindow.document.documentElement.textContent;
				obj.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
			}
			catch(e){}

			if(callback && callback.upload){
				if(!callback.scope){
					callback.upload(obj);
				}
				else{
					callback.upload.apply(callback.scope, [obj]);
				}
			}

			// Fire global custom event -- uploadEvent
			oConn.uploadEvent.fire(obj);

			if(o.uploadEvent){
				// Fire transaction custom event -- uploadEvent
				o.uploadEvent.fire(obj);
			}

			YAHOO.util.Event.removeListener(io, "load", uploadCallback);

			setTimeout(
				function(){
					document.body.removeChild(io);
					oConn.releaseObject(o);
				}, 100);
		};

		// Bind the onload handler to the iframe to detect the file upload response.
		YAHOO.util.Event.addListener(io, "load", uploadCallback);
	},

  /**
   * @description Method to terminate a transaction, if it has not reached readyState 4.
   * @method abort
   * @public
   * @static
   * @param {object} o The connection object returned by asyncRequest.
   * @param {object} callback  User-defined callback object.
   * @param {string} isTimeout boolean to indicate if abort resulted from a callback timeout.
   * @return {boolean}
   */
	abort:function(o, callback, isTimeout)
	{
		var abortStatus;
		var args = (callback && callback.argument)?callback.argument:null;


		if(o && o.conn){
			if(this.isCallInProgress(o)){
				// Issue abort request
				o.conn.abort();

				window.clearInterval(this._poll[o.tId]);
				delete this._poll[o.tId];

				if(isTimeout){
					window.clearTimeout(this._timeOut[o.tId]);
					delete this._timeOut[o.tId];
				}

				abortStatus = true;
			}
		}
		else if(o && o.isUpload === true){
			var frameId = 'yuiIO' + o.tId;
			var io = document.getElementById(frameId);

			if(io){
				// Remove all listeners on the iframe prior to
				// its destruction.
				YAHOO.util.Event.removeListener(io, "load");
				// Destroy the iframe facilitating the transaction.
				document.body.removeChild(io);

				if(isTimeout){
					window.clearTimeout(this._timeOut[o.tId]);
					delete this._timeOut[o.tId];
				}

				abortStatus = true;
			}
		}
		else{
			abortStatus = false;
		}

		if(abortStatus === true){
			// Fire global custom event -- abortEvent
			this.abortEvent.fire(o, args);

			if(o.abortEvent){
				// Fire transaction custom event -- abortEvent
				o.abortEvent.fire(o, args);
			}

			this.handleTransactionResponse(o, callback, true);
		}

		return abortStatus;
	},

  /**
   * @description Determines if the transaction is still being processed.
   * @method isCallInProgress
   * @public
   * @static
   * @param {object} o The connection object returned by asyncRequest
   * @return {boolean}
   */
	isCallInProgress:function(o)
	{
		// if the XHR object assigned to the transaction has not been dereferenced,
		// then check its readyState status.  Otherwise, return false.
		if(o && o.conn){
			return o.conn.readyState !== 4 && o.conn.readyState !== 0;
		}
		else if(o && o.isUpload === true){
			var frameId = 'yuiIO' + o.tId;
			return document.getElementById(frameId)?true:false;
		}
		else{
			return false;
		}
	},

  /**
   * @description Dereference the XHR instance and the connection object after the transaction is completed.
   * @method releaseObject
   * @private
   * @static
   * @param {object} o The connection object
   * @return {void}
   */
	releaseObject:function(o)
	{
		if(o && o.conn){
			//dereference the XHR instance.
			o.conn = null;


			//dereference the connection object.
			o = null;
		}
	}
};
YAHOO.register("connection", YAHOO.util.Connect, {version: "2.6.0", build: "1321"});
/*
Copyright (c) 2008, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.6.0
*/
(function () {

    /**
    * Config is a utility used within an Object to allow the implementer to
    * maintain a list of local configuration properties and listen for changes 
    * to those properties dynamically using CustomEvent. The initial values are 
    * also maintained so that the configuration can be reset at any given point 
    * to its initial state.
    * @namespace YAHOO.util
    * @class Config
    * @constructor
    * @param {Object} owner The owner Object to which this Config Object belongs
    */
    YAHOO.util.Config = function (owner) {

        if (owner) {
            this.init(owner);
        }


    };


    var Lang = YAHOO.lang,
        CustomEvent = YAHOO.util.CustomEvent,
        Config = YAHOO.util.Config;


    /**
     * Constant representing the CustomEvent type for the config changed event.
     * @property YAHOO.util.Config.CONFIG_CHANGED_EVENT
     * @private
     * @static
     * @final
     */
    Config.CONFIG_CHANGED_EVENT = "configChanged";
    
    /**
     * Constant representing the boolean type string
     * @property YAHOO.util.Config.BOOLEAN_TYPE
     * @private
     * @static
     * @final
     */
    Config.BOOLEAN_TYPE = "boolean";
    
    Config.prototype = {
     
        /**
        * Object reference to the owner of this Config Object
        * @property owner
        * @type Object
        */
        owner: null,
        
        /**
        * Boolean flag that specifies whether a queue is currently 
        * being executed
        * @property queueInProgress
        * @type Boolean
        */
        queueInProgress: false,
        
        /**
        * Maintains the local collection of configuration property objects and 
        * their specified values
        * @property config
        * @private
        * @type Object
        */ 
        config: null,
        
        /**
        * Maintains the local collection of configuration property objects as 
        * they were initially applied.
        * This object is used when resetting a property.
        * @property initialConfig
        * @private
        * @type Object
        */ 
        initialConfig: null,
        
        /**
        * Maintains the local, normalized CustomEvent queue
        * @property eventQueue
        * @private
        * @type Object
        */ 
        eventQueue: null,
        
        /**
        * Custom Event, notifying subscribers when Config properties are set 
        * (setProperty is called without the silent flag
        * @event configChangedEvent
        */
        configChangedEvent: null,
    
        /**
        * Initializes the configuration Object and all of its local members.
        * @method init
        * @param {Object} owner The owner Object to which this Config 
        * Object belongs
        */
        init: function (owner) {
    
            this.owner = owner;
    
            this.configChangedEvent = 
                this.createEvent(Config.CONFIG_CHANGED_EVENT);
    
            this.configChangedEvent.signature = CustomEvent.LIST;
            this.queueInProgress = false;
            this.config = {};
            this.initialConfig = {};
            this.eventQueue = [];
        
        },
        
        /**
        * Validates that the value passed in is a Boolean.
        * @method checkBoolean
        * @param {Object} val The value to validate
        * @return {Boolean} true, if the value is valid
        */ 
        checkBoolean: function (val) {
            return (typeof val == Config.BOOLEAN_TYPE);
        },
        
        /**
        * Validates that the value passed in is a number.
        * @method checkNumber
        * @param {Object} val The value to validate
        * @return {Boolean} true, if the value is valid
        */
        checkNumber: function (val) {
            return (!isNaN(val));
        },
        
        /**
        * Fires a configuration property event using the specified value. 
        * @method fireEvent
        * @private
        * @param {String} key The configuration property's name
        * @param {value} Object The value of the correct type for the property
        */ 
        fireEvent: function ( key, value ) {
            var property = this.config[key];
        
            if (property && property.event) {
                property.event.fire(value);
            } 
        },
        
        /**
        * Adds a property to the Config Object's private config hash.
        * @method addProperty
        * @param {String} key The configuration property's name
        * @param {Object} propertyObject The Object containing all of this 
        * property's arguments
        */
        addProperty: function ( key, propertyObject ) {
            key = key.toLowerCase();
        
            this.config[key] = propertyObject;
        
            propertyObject.event = this.createEvent(key, { scope: this.owner });
            propertyObject.event.signature = CustomEvent.LIST;
            
            
            propertyObject.key = key;
        
            if (propertyObject.handler) {
                propertyObject.event.subscribe(propertyObject.handler, 
                    this.owner);
            }
        
            this.setProperty(key, propertyObject.value, true);
            
            if (! propertyObject.suppressEvent) {
                this.queueProperty(key, propertyObject.value);
            }
            
        },
        
        /**
        * Returns a key-value configuration map of the values currently set in  
        * the Config Object.
        * @method getConfig
        * @return {Object} The current config, represented in a key-value map
        */
        getConfig: function () {
        
            var cfg = {},
                currCfg = this.config,
                prop,
                property;
                
            for (prop in currCfg) {
                if (Lang.hasOwnProperty(currCfg, prop)) {
                    property = currCfg[prop];
                    if (property && property.event) {
                        cfg[prop] = property.value;
                    }
                }
            }

            return cfg;
        },
        
        /**
        * Returns the value of specified property.
        * @method getProperty
        * @param {String} key The name of the property
        * @return {Object}  The value of the specified property
        */
        getProperty: function (key) {
            var property = this.config[key.toLowerCase()];
            if (property && property.event) {
                return property.value;
            } else {
                return undefined;
            }
        },
        
        /**
        * Resets the specified property's value to its initial value.
        * @method resetProperty
        * @param {String} key The name of the property
        * @return {Boolean} True is the property was reset, false if not
        */
        resetProperty: function (key) {
    
            key = key.toLowerCase();
        
            var property = this.config[key];
    
            if (property && property.event) {
    
                if (this.initialConfig[key] && 
                    !Lang.isUndefined(this.initialConfig[key])) {
    
                    this.setProperty(key, this.initialConfig[key]);

                    return true;
    
                }
    
            } else {
    
                return false;
            }
    
        },
        
        /**
        * Sets the value of a property. If the silent property is passed as 
        * true, the property's event will not be fired.
        * @method setProperty
        * @param {String} key The name of the property
        * @param {String} value The value to set the property to
        * @param {Boolean} silent Whether the value should be set silently, 
        * without firing the property event.
        * @return {Boolean} True, if the set was successful, false if it failed.
        */
        setProperty: function (key, value, silent) {
        
            var property;
        
            key = key.toLowerCase();
        
            if (this.queueInProgress && ! silent) {
                // Currently running through a queue... 
                this.queueProperty(key,value);
                return true;
    
            } else {
                property = this.config[key];
                if (property && property.event) {
                    if (property.validator && !property.validator(value)) {
                        return false;
                    } else {
                        property.value = value;
                        if (! silent) {
                            this.fireEvent(key, value);
                            this.configChangedEvent.fire([key, value]);
                        }
                        return true;
                    }
                } else {
                    return false;
                }
            }
        },
        
        /**
        * Sets the value of a property and queues its event to execute. If the 
        * event is already scheduled to execute, it is
        * moved from its current position to the end of the queue.
        * @method queueProperty
        * @param {String} key The name of the property
        * @param {String} value The value to set the property to
        * @return {Boolean}  true, if the set was successful, false if 
        * it failed.
        */ 
        queueProperty: function (key, value) {
        
            key = key.toLowerCase();
        
            var property = this.config[key],
                foundDuplicate = false,
                iLen,
                queueItem,
                queueItemKey,
                queueItemValue,
                sLen,
                supercedesCheck,
                qLen,
                queueItemCheck,
                queueItemCheckKey,
                queueItemCheckValue,
                i,
                s,
                q;
                                
            if (property && property.event) {
    
                if (!Lang.isUndefined(value) && property.validator && 
                    !property.validator(value)) { // validator
                    return false;
                } else {
        
                    if (!Lang.isUndefined(value)) {
                        property.value = value;
                    } else {
                        value = property.value;
                    }
        
                    foundDuplicate = false;
                    iLen = this.eventQueue.length;
        
                    for (i = 0; i < iLen; i++) {
                        queueItem = this.eventQueue[i];
        
                        if (queueItem) {
                            queueItemKey = queueItem[0];
                            queueItemValue = queueItem[1];

                            if (queueItemKey == key) {
    
                                /*
                                    found a dupe... push to end of queue, null 
                                    current item, and break
                                */
    
                                this.eventQueue[i] = null;
    
                                this.eventQueue.push(
                                    [key, (!Lang.isUndefined(value) ? 
                                    value : queueItemValue)]);
    
                                foundDuplicate = true;
                                break;
                            }
                        }
                    }
                    
                    // this is a refire, or a new property in the queue
    
                    if (! foundDuplicate && !Lang.isUndefined(value)) { 
                        this.eventQueue.push([key, value]);
                    }
                }
        
                if (property.supercedes) {

                    sLen = property.supercedes.length;

                    for (s = 0; s < sLen; s++) {

                        supercedesCheck = property.supercedes[s];
                        qLen = this.eventQueue.length;

                        for (q = 0; q < qLen; q++) {
                            queueItemCheck = this.eventQueue[q];

                            if (queueItemCheck) {
                                queueItemCheckKey = queueItemCheck[0];
                                queueItemCheckValue = queueItemCheck[1];

                                if (queueItemCheckKey == 
                                    supercedesCheck.toLowerCase() ) {

                                    this.eventQueue.push([queueItemCheckKey, 
                                        queueItemCheckValue]);

                                    this.eventQueue[q] = null;
                                    break;

                                }
                            }
                        }
                    }
                }


                return true;
            } else {
                return false;
            }
        },
        
        /**
        * Fires the event for a property using the property's current value.
        * @method refireEvent
        * @param {String} key The name of the property
        */
        refireEvent: function (key) {
    
            key = key.toLowerCase();
        
            var property = this.config[key];
    
            if (property && property.event && 
    
                !Lang.isUndefined(property.value)) {
    
                if (this.queueInProgress) {
    
                    this.queueProperty(key);
    
                } else {
    
                    this.fireEvent(key, property.value);
    
                }
    
            }
        },
        
        /**
        * Applies a key-value Object literal to the configuration, replacing  
        * any existing values, and queueing the property events.
        * Although the values will be set, fireQueue() must be called for their 
        * associated events to execute.
        * @method applyConfig
        * @param {Object} userConfig The configuration Object literal
        * @param {Boolean} init  When set to true, the initialConfig will 
        * be set to the userConfig passed in, so that calling a reset will 
        * reset the properties to the passed values.
        */
        applyConfig: function (userConfig, init) {
        
            var sKey,
                oConfig;

            if (init) {
                oConfig = {};
                for (sKey in userConfig) {
                    if (Lang.hasOwnProperty(userConfig, sKey)) {
                        oConfig[sKey.toLowerCase()] = userConfig[sKey];
                    }
                }
                this.initialConfig = oConfig;
            }

            for (sKey in userConfig) {
                if (Lang.hasOwnProperty(userConfig, sKey)) {
                    this.queueProperty(sKey, userConfig[sKey]);
                }
            }
        },
        
        /**
        * Refires the events for all configuration properties using their 
        * current values.
        * @method refresh
        */
        refresh: function () {

            var prop;

            for (prop in this.config) {
                if (Lang.hasOwnProperty(this.config, prop)) {
                    this.refireEvent(prop);
                }
            }
        },
        
        /**
        * Fires the normalized list of queued property change events
        * @method fireQueue
        */
        fireQueue: function () {
        
            var i, 
                queueItem,
                key,
                value,
                property;
        
            this.queueInProgress = true;
            for (i = 0;i < this.eventQueue.length; i++) {
                queueItem = this.eventQueue[i];
                if (queueItem) {
        
                    key = queueItem[0];
                    value = queueItem[1];
                    property = this.config[key];

                    property.value = value;

                    // Clear out queue entry, to avoid it being 
                    // re-added to the queue by any queueProperty/supercedes
                    // calls which are invoked during fireEvent
                    this.eventQueue[i] = null;

                    this.fireEvent(key,value);
                }
            }
            
            this.queueInProgress = false;
            this.eventQueue = [];
        },
        
        /**
        * Subscribes an external handler to the change event for any 
        * given property. 
        * @method subscribeToConfigEvent
        * @param {String} key The property name
        * @param {Function} handler The handler function to use subscribe to 
        * the property's event
        * @param {Object} obj The Object to use for scoping the event handler 
        * (see CustomEvent documentation)
        * @param {Boolean} override Optional. If true, will override "this"  
        * within the handler to map to the scope Object passed into the method.
        * @return {Boolean} True, if the subscription was successful, 
        * otherwise false.
        */ 
        subscribeToConfigEvent: function (key, handler, obj, override) {
    
            var property = this.config[key.toLowerCase()];
    
            if (property && property.event) {
                if (!Config.alreadySubscribed(property.event, handler, obj)) {
                    property.event.subscribe(handler, obj, override);
                }
                return true;
            } else {
                return false;
            }
    
        },
        
        /**
        * Unsubscribes an external handler from the change event for any 
        * given property. 
        * @method unsubscribeFromConfigEvent
        * @param {String} key The property name
        * @param {Function} handler The handler function to use subscribe to 
        * the property's event
        * @param {Object} obj The Object to use for scoping the event 
        * handler (see CustomEvent documentation)
        * @return {Boolean} True, if the unsubscription was successful, 
        * otherwise false.
        */
        unsubscribeFromConfigEvent: function (key, handler, obj) {
            var property = this.config[key.toLowerCase()];
            if (property && property.event) {
                return property.event.unsubscribe(handler, obj);
            } else {
                return false;
            }
        },
        
        /**
        * Returns a string representation of the Config object
        * @method toString
        * @return {String} The Config object in string format.
        */
        toString: function () {
            var output = "Config";
            if (this.owner) {
                output += " [" + this.owner.toString() + "]";
            }
            return output;
        },
        
        /**
        * Returns a string representation of the Config object's current 
        * CustomEvent queue
        * @method outputEventQueue
        * @return {String} The string list of CustomEvents currently queued 
        * for execution
        */
        outputEventQueue: function () {

            var output = "",
                queueItem,
                q,
                nQueue = this.eventQueue.length;
              
            for (q = 0; q < nQueue; q++) {
                queueItem = this.eventQueue[q];
                if (queueItem) {
                    output += queueItem[0] + "=" + queueItem[1] + ", ";
                }
            }
            return output;
        },

        /**
        * Sets all properties to null, unsubscribes all listeners from each 
        * property's change event and all listeners from the configChangedEvent.
        * @method destroy
        */
        destroy: function () {

            var oConfig = this.config,
                sProperty,
                oProperty;


            for (sProperty in oConfig) {
            
                if (Lang.hasOwnProperty(oConfig, sProperty)) {

                    oProperty = oConfig[sProperty];

                    oProperty.event.unsubscribeAll();
                    oProperty.event = null;

                }
            
            }
            
            this.configChangedEvent.unsubscribeAll();
            
            this.configChangedEvent = null;
            this.owner = null;
            this.config = null;
            this.initialConfig = null;
            this.eventQueue = null;
        
        }

    };
    
    
    
    /**
    * Checks to determine if a particular function/Object pair are already 
    * subscribed to the specified CustomEvent
    * @method YAHOO.util.Config.alreadySubscribed
    * @static
    * @param {YAHOO.util.CustomEvent} evt The CustomEvent for which to check 
    * the subscriptions
    * @param {Function} fn The function to look for in the subscribers list
    * @param {Object} obj The execution scope Object for the subscription
    * @return {Boolean} true, if the function/Object pair is already subscribed 
    * to the CustomEvent passed in
    */
    Config.alreadySubscribed = function (evt, fn, obj) {
    
        var nSubscribers = evt.subscribers.length,
            subsc,
            i;

        if (nSubscribers > 0) {
            i = nSubscribers - 1;
            do {
                subsc = evt.subscribers[i];
                if (subsc && subsc.obj == obj && subsc.fn == fn) {
                    return true;
                }
            }
            while (i--);
        }

        return false;

    };

    YAHOO.lang.augmentProto(Config, YAHOO.util.EventProvider);

}());

(function () {

    /**
    * The Container family of components is designed to enable developers to 
    * create different kinds of content-containing modules on the web. Module 
    * and Overlay are the most basic containers, and they can be used directly 
    * or extended to build custom containers. Also part of the Container family 
    * are four UI controls that extend Module and Overlay: Tooltip, Panel, 
    * Dialog, and SimpleDialog.
    * @module container
    * @title Container
    * @requires yahoo, dom, event 
    * @optional dragdrop, animation, button
    */
    
    /**
    * Module is a JavaScript representation of the Standard Module Format. 
    * Standard Module Format is a simple standard for markup containers where 
    * child nodes representing the header, body, and footer of the content are 
    * denoted using the CSS classes "hd", "bd", and "ft" respectively. 
    * Module is the base class for all other classes in the YUI 
    * Container package.
    * @namespace YAHOO.widget
    * @class Module
    * @constructor
    * @param {String} el The element ID representing the Module <em>OR</em>
    * @param {HTMLElement} el The element representing the Module
    * @param {Object} userConfig The configuration Object literal containing 
    * the configuration that should be set for this module. See configuration 
    * documentation for more details.
    */
    YAHOO.widget.Module = function (el, userConfig) {
        if (el) {
            this.init(el, userConfig);
        } else {
        }
    };

    var Dom = YAHOO.util.Dom,
        Config = YAHOO.util.Config,
        Event = YAHOO.util.Event,
        CustomEvent = YAHOO.util.CustomEvent,
        Module = YAHOO.widget.Module,

        m_oModuleTemplate,
        m_oHeaderTemplate,
        m_oBodyTemplate,
        m_oFooterTemplate,

        /**
        * Constant representing the name of the Module's events
        * @property EVENT_TYPES
        * @private
        * @final
        * @type Object
        */
        EVENT_TYPES = {
            "BEFORE_INIT": "beforeInit",
            "INIT": "init",
            "APPEND": "append",
            "BEFORE_RENDER": "beforeRender",
            "RENDER": "render",
            "CHANGE_HEADER": "changeHeader",
            "CHANGE_BODY": "changeBody",
            "CHANGE_FOOTER": "changeFooter",
            "CHANGE_CONTENT": "changeContent",
            "DESTORY": "destroy",
            "BEFORE_SHOW": "beforeShow",
            "SHOW": "show",
            "BEFORE_HIDE": "beforeHide",
            "HIDE": "hide"
        },
            
        /**
        * Constant representing the Module's configuration properties
        * @property DEFAULT_CONFIG
        * @private
        * @final
        * @type Object
        */
        DEFAULT_CONFIG = {
        
            "VISIBLE": { 
                key: "visible", 
                value: true, 
                validator: YAHOO.lang.isBoolean 
            },
        
            "EFFECT": { 
                key: "effect", 
                suppressEvent: true, 
                supercedes: ["visible"] 
            },

            "MONITOR_RESIZE": { 
                key: "monitorresize", 
                value: true  
            },

            "APPEND_TO_DOCUMENT_BODY": { 
                key: "appendtodocumentbody", 
                value: false
            }
        };
    
    /**
    * Constant representing the prefix path to use for non-secure images
    * @property YAHOO.widget.Module.IMG_ROOT
    * @static
    * @final
    * @type String
    */
    Module.IMG_ROOT = null;
    
    /**
    * Constant representing the prefix path to use for securely served images
    * @property YAHOO.widget.Module.IMG_ROOT_SSL
    * @static
    * @final
    * @type String
    */
    Module.IMG_ROOT_SSL = null;
    
    /**
    * Constant for the default CSS class name that represents a Module
    * @property YAHOO.widget.Module.CSS_MODULE
    * @static
    * @final
    * @type String
    */
    Module.CSS_MODULE = "yui-module";
    
    /**
    * Constant representing the module header
    * @property YAHOO.widget.Module.CSS_HEADER
    * @static
    * @final
    * @type String
    */
    Module.CSS_HEADER = "hd";

    /**
    * Constant representing the module body
    * @property YAHOO.widget.Module.CSS_BODY
    * @static
    * @final
    * @type String
    */
    Module.CSS_BODY = "bd";
    
    /**
    * Constant representing the module footer
    * @property YAHOO.widget.Module.CSS_FOOTER
    * @static
    * @final
    * @type String
    */
    Module.CSS_FOOTER = "ft";
    
    /**
    * Constant representing the url for the "src" attribute of the iframe 
    * used to monitor changes to the browser's base font size
    * @property YAHOO.widget.Module.RESIZE_MONITOR_SECURE_URL
    * @static
    * @final
    * @type String
    */
    Module.RESIZE_MONITOR_SECURE_URL = "javascript:false;";
    
    /**
    * Singleton CustomEvent fired when the font size is changed in the browser.
    * Opera's "zoom" functionality currently does not support text 
    * size detection.
    * @event YAHOO.widget.Module.textResizeEvent
    */
    Module.textResizeEvent = new CustomEvent("textResize");

    function createModuleTemplate() {

        if (!m_oModuleTemplate) {
            m_oModuleTemplate = document.createElement("div");
            
            m_oModuleTemplate.innerHTML = ("<div class=\"" + 
                Module.CSS_HEADER + "\"></div>" + "<div class=\"" + 
                Module.CSS_BODY + "\"></div><div class=\"" + 
                Module.CSS_FOOTER + "\"></div>");

            m_oHeaderTemplate = m_oModuleTemplate.firstChild;
            m_oBodyTemplate = m_oHeaderTemplate.nextSibling;
            m_oFooterTemplate = m_oBodyTemplate.nextSibling;
        }

        return m_oModuleTemplate;
    }

    function createHeader() {
        if (!m_oHeaderTemplate) {
            createModuleTemplate();
        }
        return (m_oHeaderTemplate.cloneNode(false));
    }

    function createBody() {
        if (!m_oBodyTemplate) {
            createModuleTemplate();
        }
        return (m_oBodyTemplate.cloneNode(false));
    }

    function createFooter() {
        if (!m_oFooterTemplate) {
            createModuleTemplate();
        }
        return (m_oFooterTemplate.cloneNode(false));
    }

    Module.prototype = {

        /**
        * The class's constructor function
        * @property contructor
        * @type Function
        */
        constructor: Module,
        
        /**
        * The main module element that contains the header, body, and footer
        * @property element
        * @type HTMLElement
        */
        element: null,

        /**
        * The header element, denoted with CSS class "hd"
        * @property header
        * @type HTMLElement
        */
        header: null,

        /**
        * The body element, denoted with CSS class "bd"
        * @property body
        * @type HTMLElement
        */
        body: null,

        /**
        * The footer element, denoted with CSS class "ft"
        * @property footer
        * @type HTMLElement
        */
        footer: null,

        /**
        * The id of the element
        * @property id
        * @type String
        */
        id: null,

        /**
        * A string representing the root path for all images created by
        * a Module instance.
        * @deprecated It is recommend that any images for a Module be applied
        * via CSS using the "background-image" property.
        * @property imageRoot
        * @type String
        */
        imageRoot: Module.IMG_ROOT,

        /**
        * Initializes the custom events for Module which are fired 
        * automatically at appropriate times by the Module class.
        * @method initEvents
        */
        initEvents: function () {

            var SIGNATURE = CustomEvent.LIST;

            /**
            * CustomEvent fired prior to class initalization.
            * @event beforeInitEvent
            * @param {class} classRef class reference of the initializing 
            * class, such as this.beforeInitEvent.fire(Module)
            */
            this.beforeInitEvent = this.createEvent(EVENT_TYPES.BEFORE_INIT);
            this.beforeInitEvent.signature = SIGNATURE;

            /**
            * CustomEvent fired after class initalization.
            * @event initEvent
            * @param {class} classRef class reference of the initializing 
            * class, such as this.beforeInitEvent.fire(Module)
            */  
            this.initEvent = this.createEvent(EVENT_TYPES.INIT);
            this.initEvent.signature = SIGNATURE;

            /**
            * CustomEvent fired when the Module is appended to the DOM
            * @event appendEvent
            */
            this.appendEvent = this.createEvent(EVENT_TYPES.APPEND);
            this.appendEvent.signature = SIGNATURE;

            /**
            * CustomEvent fired before the Module is rendered
            * @event beforeRenderEvent
            */
            this.beforeRenderEvent = this.createEvent(EVENT_TYPES.BEFORE_RENDER);
            this.beforeRenderEvent.signature = SIGNATURE;
        
            /**
            * CustomEvent fired after the Module is rendered
            * @event renderEvent
            */
            this.renderEvent = this.createEvent(EVENT_TYPES.RENDER);
            this.renderEvent.signature = SIGNATURE;
        
            /**
            * CustomEvent fired when the header content of the Module 
            * is modified
            * @event changeHeaderEvent
            * @param {String/HTMLElement} content String/element representing 
            * the new header content
            */
            this.changeHeaderEvent = this.createEvent(EVENT_TYPES.CHANGE_HEADER);
            this.changeHeaderEvent.signature = SIGNATURE;
            
            /**
            * CustomEvent fired when the body content of the Module is modified
            * @event changeBodyEvent
            * @param {String/HTMLElement} content String/element representing 
            * the new body content
            */  
            this.changeBodyEvent = this.createEvent(EVENT_TYPES.CHANGE_BODY);
            this.changeBodyEvent.signature = SIGNATURE;
            
            /**
            * CustomEvent fired when the footer content of the Module 
            * is modified
            * @event changeFooterEvent
            * @param {String/HTMLElement} content String/element representing 
            * the new footer content
            */
            this.changeFooterEvent = this.createEvent(EVENT_TYPES.CHANGE_FOOTER);
            this.changeFooterEvent.signature = SIGNATURE;
        
            /**
            * CustomEvent fired when the content of the Module is modified
            * @event changeContentEvent
            */
            this.changeContentEvent = this.createEvent(EVENT_TYPES.CHANGE_CONTENT);
            this.changeContentEvent.signature = SIGNATURE;

            /**
            * CustomEvent fired when the Module is destroyed
            * @event destroyEvent
            */
            this.destroyEvent = this.createEvent(EVENT_TYPES.DESTORY);
            this.destroyEvent.signature = SIGNATURE;

            /**
            * CustomEvent fired before the Module is shown
            * @event beforeShowEvent
            */
            this.beforeShowEvent = this.createEvent(EVENT_TYPES.BEFORE_SHOW);
            this.beforeShowEvent.signature = SIGNATURE;

            /**
            * CustomEvent fired after the Module is shown
            * @event showEvent
            */
            this.showEvent = this.createEvent(EVENT_TYPES.SHOW);
            this.showEvent.signature = SIGNATURE;

            /**
            * CustomEvent fired before the Module is hidden
            * @event beforeHideEvent
            */
            this.beforeHideEvent = this.createEvent(EVENT_TYPES.BEFORE_HIDE);
            this.beforeHideEvent.signature = SIGNATURE;

            /**
            * CustomEvent fired after the Module is hidden
            * @event hideEvent
            */
            this.hideEvent = this.createEvent(EVENT_TYPES.HIDE);
            this.hideEvent.signature = SIGNATURE;
        }, 

        /**
        * String representing the current user-agent platform
        * @property platform
        * @type String
        */
        platform: function () {
            var ua = navigator.userAgent.toLowerCase();

            if (ua.indexOf("windows") != -1 || ua.indexOf("win32") != -1) {
                return "windows";
            } else if (ua.indexOf("macintosh") != -1) {
                return "mac";
            } else {
                return false;
            }
        }(),
        
        /**
        * String representing the user-agent of the browser
        * @deprecated Use YAHOO.env.ua
        * @property browser
        * @type String
        */
        browser: function () {
            var ua = navigator.userAgent.toLowerCase();
            /*
                 Check Opera first in case of spoof and check Safari before
                 Gecko since Safari's user agent string includes "like Gecko"
            */
            if (ua.indexOf('opera') != -1) { 
                return 'opera';
            } else if (ua.indexOf('msie 7') != -1) {
                return 'ie7';
            } else if (ua.indexOf('msie') != -1) {
                return 'ie';
            } else if (ua.indexOf('safari') != -1) { 
                return 'safari';
            } else if (ua.indexOf('gecko') != -1) {
                return 'gecko';
            } else {
                return false;
            }
        }(),
        
        /**
        * Boolean representing whether or not the current browsing context is 
        * secure (https)
        * @property isSecure
        * @type Boolean
        */
        isSecure: function () {
            if (window.location.href.toLowerCase().indexOf("https") === 0) {
                return true;
            } else {
                return false;
            }
        }(),
        
        /**
        * Initializes the custom events for Module which are fired 
        * automatically at appropriate times by the Module class.
        */
        initDefaultConfig: function () {
            // Add properties //
            /**
            * Specifies whether the Module is visible on the page.
            * @config visible
            * @type Boolean
            * @default true
            */
            this.cfg.addProperty(DEFAULT_CONFIG.VISIBLE.key, {
                handler: this.configVisible, 
                value: DEFAULT_CONFIG.VISIBLE.value, 
                validator: DEFAULT_CONFIG.VISIBLE.validator
            });

            /**
            * <p>
            * Object or array of objects representing the ContainerEffect 
            * classes that are active for animating the container.
            * </p>
            * <p>
            * <strong>NOTE:</strong> Although this configuration 
            * property is introduced at the Module level, an out of the box
            * implementation is not shipped for the Module class so setting
            * the proroperty on the Module class has no effect. The Overlay 
            * class is the first class to provide out of the box ContainerEffect 
            * support.
            * </p>
            * @config effect
            * @type Object
            * @default null
            */
            this.cfg.addProperty(DEFAULT_CONFIG.EFFECT.key, {
                suppressEvent: DEFAULT_CONFIG.EFFECT.suppressEvent, 
                supercedes: DEFAULT_CONFIG.EFFECT.supercedes
            });

            /**
            * Specifies whether to create a special proxy iframe to monitor 
            * for user font resizing in the document
            * @config monitorresize
            * @type Boolean
            * @default true
            */
            this.cfg.addProperty(DEFAULT_CONFIG.MONITOR_RESIZE.key, {
                handler: this.configMonitorResize,
                value: DEFAULT_CONFIG.MONITOR_RESIZE.value
            });

            /**
            * Specifies if the module should be rendered as the first child 
            * of document.body or appended as the last child when render is called
            * with document.body as the "appendToNode".
            * <p>
            * Appending to the body while the DOM is still being constructed can 
            * lead to Operation Aborted errors in IE hence this flag is set to 
            * false by default.
            * </p>
            * 
            * @config appendtodocumentbody
            * @type Boolean
            * @default false
            */
            this.cfg.addProperty(DEFAULT_CONFIG.APPEND_TO_DOCUMENT_BODY.key, {
                value: DEFAULT_CONFIG.APPEND_TO_DOCUMENT_BODY.value
            });
        },

        /**
        * The Module class's initialization method, which is executed for
        * Module and all of its subclasses. This method is automatically 
        * called by the constructor, and  sets up all DOM references for 
        * pre-existing markup, and creates required markup if it is not 
        * already present.
        * @method init
        * @param {String} el The element ID representing the Module <em>OR</em>
        * @param {HTMLElement} el The element representing the Module
        * @param {Object} userConfig The configuration Object literal 
        * containing the configuration that should be set for this module. 
        * See configuration documentation for more details.
        */
        init: function (el, userConfig) {

            var elId, child;

            this.initEvents();
            this.beforeInitEvent.fire(Module);

            /**
            * The Module's Config object used for monitoring 
            * configuration properties.
            * @property cfg
            * @type YAHOO.util.Config
            */
            this.cfg = new Config(this);

            if (this.isSecure) {
                this.imageRoot = Module.IMG_ROOT_SSL;
            }

            if (typeof el == "string") {
                elId = el;
                el = document.getElementById(el);
                if (! el) {
                    el = (createModuleTemplate()).cloneNode(false);
                    el.id = elId;
                }
            }

            this.element = el;

            if (el.id) {
                this.id = el.id;
            }

            child = this.element.firstChild;

            if (child) {
                var fndHd = false, fndBd = false, fndFt = false;
                do {
                    // We're looking for elements
                    if (1 == child.nodeType) {
                        if (!fndHd && Dom.hasClass(child, Module.CSS_HEADER)) {
                            this.header = child;
                            fndHd = true;
                        } else if (!fndBd && Dom.hasClass(child, Module.CSS_BODY)) {
                            this.body = child;
                            fndBd = true;
                        } else if (!fndFt && Dom.hasClass(child, Module.CSS_FOOTER)){
                            this.footer = child;
                            fndFt = true;
                        }
                    }
                } while ((child = child.nextSibling));
            }

            this.initDefaultConfig();

            Dom.addClass(this.element, Module.CSS_MODULE);

            if (userConfig) {
                this.cfg.applyConfig(userConfig, true);
            }

            /*
                Subscribe to the fireQueue() method of Config so that any 
                queued configuration changes are excecuted upon render of 
                the Module
            */ 

            if (!Config.alreadySubscribed(this.renderEvent, this.cfg.fireQueue, this.cfg)) {
                this.renderEvent.subscribe(this.cfg.fireQueue, this.cfg, true);
            }

            this.initEvent.fire(Module);
        },

        /**
        * Initialize an empty IFRAME that is placed out of the visible area 
        * that can be used to detect text resize.
        * @method initResizeMonitor
        */
        initResizeMonitor: function () {

            var isGeckoWin = (YAHOO.env.ua.gecko && this.platform == "windows");
            if (isGeckoWin) {
                // Help prevent spinning loading icon which 
                // started with FireFox 2.0.0.8/Win
                var self = this;
                setTimeout(function(){self._initResizeMonitor();}, 0);
            } else {
                this._initResizeMonitor();
            }
        },

        /**
         * Create and initialize the text resize monitoring iframe.
         * 
         * @protected
         * @method _initResizeMonitor
         */
        _initResizeMonitor : function() {

            var oDoc, 
                oIFrame, 
                sHTML;

            function fireTextResize() {
                Module.textResizeEvent.fire();
            }

            if (!YAHOO.env.ua.opera) {
                oIFrame = Dom.get("_yuiResizeMonitor");

                var supportsCWResize = this._supportsCWResize();

                if (!oIFrame) {
                    oIFrame = document.createElement("iframe");

                    if (this.isSecure && Module.RESIZE_MONITOR_SECURE_URL && YAHOO.env.ua.ie) {
                        oIFrame.src = Module.RESIZE_MONITOR_SECURE_URL;
                    }

                    if (!supportsCWResize) {
                        // Can't monitor on contentWindow, so fire from inside iframe
                        sHTML = ["<html><head><script ",
                                 "type=\"text/javascript\">",
                                 "window.onresize=function(){window.parent.",
                                 "YAHOO.widget.Module.textResizeEvent.",
                                 "fire();};<",
                                 "\/script></head>",
                                 "<body></body></html>"].join('');

                        oIFrame.src = "data:text/html;charset=utf-8," + encodeURIComponent(sHTML);
                    }

                    oIFrame.id = "_yuiResizeMonitor";
                    oIFrame.title = "Text Resize Monitor";
                    /*
                        Need to set "position" property before inserting the 
                        iframe into the document or Safari's status bar will 
                        forever indicate the iframe is loading 
                        (See SourceForge bug #1723064)
                    */
                    oIFrame.style.position = "absolute";
                    oIFrame.style.visibility = "hidden";

                    var db = document.body,
                        fc = db.firstChild;
                    if (fc) {
                        db.insertBefore(oIFrame, fc);
                    } else {
                        db.appendChild(oIFrame);
                    }

                    oIFrame.style.width = "10em";
                    oIFrame.style.height = "10em";
                    oIFrame.style.top = (-1 * oIFrame.offsetHeight) + "px";
                    oIFrame.style.left = (-1 * oIFrame.offsetWidth) + "px";
                    oIFrame.style.borderWidth = "0";
                    oIFrame.style.visibility = "visible";

                    /*
                       Don't open/close the document for Gecko like we used to, since it
                       leads to duplicate cookies. (See SourceForge bug #1721755)
                    */
                    if (YAHOO.env.ua.webkit) {
                        oDoc = oIFrame.contentWindow.document;
                        oDoc.open();
                        oDoc.close();
                    }
                }

                if (oIFrame && oIFrame.contentWindow) {
                    Module.textResizeEvent.subscribe(this.onDomResize, this, true);

                    if (!Module.textResizeInitialized) {
                        if (supportsCWResize) {
                            if (!Event.on(oIFrame.contentWindow, "resize", fireTextResize)) {
                                /*
                                     This will fail in IE if document.domain has 
                                     changed, so we must change the listener to 
                                     use the oIFrame element instead
                                */
                                Event.on(oIFrame, "resize", fireTextResize);
                            }
                        }
                        Module.textResizeInitialized = true;
                    }
                    this.resizeMonitor = oIFrame;
                }
            }
        },

        /**
         * Text resize monitor helper method.
         * Determines if the browser supports resize events on iframe content windows.
         * 
         * @private
         * @method _supportsCWResize
         */
        _supportsCWResize : function() {
            /*
                Gecko 1.8.0 (FF1.5), 1.8.1.0-5 (FF2) won't fire resize on contentWindow.
                Gecko 1.8.1.6+ (FF2.0.0.6+) and all other browsers will fire resize on contentWindow.

                We don't want to start sniffing for patch versions, so fire textResize the same
                way on all FF, until 1.9 (3.x) is out
             */
            var bSupported = true;
            if (YAHOO.env.ua.gecko && YAHOO.env.ua.gecko <= 1.8) {
                bSupported = false;
                /*
                var v = navigator.userAgent.match(/rv:([^\s\)]*)/); // From YAHOO.env.ua
                if (v && v[0]) {
                    var sv = v[0].match(/\d\.\d\.(\d)/);
                    if (sv && sv[1]) {
                        if (parseInt(sv[1], 10) > 0) {
                            bSupported = true;
                        }
                    }
                }
                */
            }
            return bSupported;
        },

        /**
        * Event handler fired when the resize monitor element is resized.
        * @method onDomResize
        * @param {DOMEvent} e The DOM resize event
        * @param {Object} obj The scope object passed to the handler
        */
        onDomResize: function (e, obj) {

            var nLeft = -1 * this.resizeMonitor.offsetWidth,
                nTop = -1 * this.resizeMonitor.offsetHeight;
        
            this.resizeMonitor.style.top = nTop + "px";
            this.resizeMonitor.style.left =  nLeft + "px";

        },

        /**
        * Sets the Module's header content to the string specified, or appends 
        * the passed element to the header. If no header is present, one will 
        * be automatically created. An empty string can be passed to the method
        * to clear the contents of the header.
        * 
        * @method setHeader
        * @param {String} headerContent The string used to set the header.
        * As a convenience, non HTMLElement objects can also be passed into 
        * the method, and will be treated as strings, with the header innerHTML
        * set to their default toString implementations.
        * <em>OR</em>
        * @param {HTMLElement} headerContent The HTMLElement to append to 
        * <em>OR</em>
        * @param {DocumentFragment} headerContent The document fragment 
        * containing elements which are to be added to the header
        */
        setHeader: function (headerContent) {
            var oHeader = this.header || (this.header = createHeader());

            if (headerContent.nodeName) {
                oHeader.innerHTML = "";
                oHeader.appendChild(headerContent);
            } else {
                oHeader.innerHTML = headerContent;
            }

            this.changeHeaderEvent.fire(headerContent);
            this.changeContentEvent.fire();

        },

        /**
        * Appends the passed element to the header. If no header is present, 
        * one will be automatically created.
        * @method appendToHeader
        * @param {HTMLElement | DocumentFragment} element The element to 
        * append to the header. In the case of a document fragment, the
        * children of the fragment will be appended to the header.
        */
        appendToHeader: function (element) {
            var oHeader = this.header || (this.header = createHeader());

            oHeader.appendChild(element);

            this.changeHeaderEvent.fire(element);
            this.changeContentEvent.fire();

        },

        /**
        * Sets the Module's body content to the HTML specified. 
        * 
        * If no body is present, one will be automatically created. 
        * 
        * An empty string can be passed to the method to clear the contents of the body.
        * @method setBody
        * @param {String} bodyContent The HTML used to set the body. 
        * As a convenience, non HTMLElement objects can also be passed into 
        * the method, and will be treated as strings, with the body innerHTML
        * set to their default toString implementations.
        * <em>OR</em>
        * @param {HTMLElement} bodyContent The HTMLElement to add as the first and only
        * child of the body element.
        * <em>OR</em>
        * @param {DocumentFragment} bodyContent The document fragment 
        * containing elements which are to be added to the body
        */
        setBody: function (bodyContent) {
            var oBody = this.body || (this.body = createBody());

            if (bodyContent.nodeName) {
                oBody.innerHTML = "";
                oBody.appendChild(bodyContent);
            } else {
                oBody.innerHTML = bodyContent;
            }

            this.changeBodyEvent.fire(bodyContent);
            this.changeContentEvent.fire();
        },

        /**
        * Appends the passed element to the body. If no body is present, one 
        * will be automatically created.
        * @method appendToBody
        * @param {HTMLElement | DocumentFragment} element The element to 
        * append to the body. In the case of a document fragment, the
        * children of the fragment will be appended to the body.
        * 
        */
        appendToBody: function (element) {
            var oBody = this.body || (this.body = createBody());
        
            oBody.appendChild(element);

            this.changeBodyEvent.fire(element);
            this.changeContentEvent.fire();

        },
        
        /**
        * Sets the Module's footer content to the HTML specified, or appends 
        * the passed element to the footer. If no footer is present, one will 
        * be automatically created. An empty string can be passed to the method
        * to clear the contents of the footer.
        * @method setFooter
        * @param {String} footerContent The HTML used to set the footer 
        * As a convenience, non HTMLElement objects can also be passed into 
        * the method, and will be treated as strings, with the footer innerHTML
        * set to their default toString implementations.
        * <em>OR</em>
        * @param {HTMLElement} footerContent The HTMLElement to append to 
        * the footer
        * <em>OR</em>
        * @param {DocumentFragment} footerContent The document fragment containing 
        * elements which are to be added to the footer
        */
        setFooter: function (footerContent) {

            var oFooter = this.footer || (this.footer = createFooter());

            if (footerContent.nodeName) {
                oFooter.innerHTML = "";
                oFooter.appendChild(footerContent);
            } else {
                oFooter.innerHTML = footerContent;
            }

            this.changeFooterEvent.fire(footerContent);
            this.changeContentEvent.fire();
        },

        /**
        * Appends the passed element to the footer. If no footer is present, 
        * one will be automatically created.
        * @method appendToFooter
        * @param {HTMLElement | DocumentFragment} element The element to 
        * append to the footer. In the case of a document fragment, the
        * children of the fragment will be appended to the footer
        */
        appendToFooter: function (element) {

            var oFooter = this.footer || (this.footer = createFooter());

            oFooter.appendChild(element);

            this.changeFooterEvent.fire(element);
            this.changeContentEvent.fire();

        },

        /**
        * Renders the Module by inserting the elements that are not already 
        * in the main Module into their correct places. Optionally appends 
        * the Module to the specified node prior to the render's execution. 
        * <p>
        * For Modules without existing markup, the appendToNode argument 
        * is REQUIRED. If this argument is ommitted and the current element is 
        * not present in the document, the function will return false, 
        * indicating that the render was a failure.
        * </p>
        * <p>
        * NOTE: As of 2.3.1, if the appendToNode is the document's body element
        * then the module is rendered as the first child of the body element, 
        * and not appended to it, to avoid Operation Aborted errors in IE when 
        * rendering the module before window's load event is fired. You can 
        * use the appendtodocumentbody configuration property to change this 
        * to append to document.body if required.
        * </p>
        * @method render
        * @param {String} appendToNode The element id to which the Module 
        * should be appended to prior to rendering <em>OR</em>
        * @param {HTMLElement} appendToNode The element to which the Module 
        * should be appended to prior to rendering
        * @param {HTMLElement} moduleElement OPTIONAL. The element that 
        * represents the actual Standard Module container.
        * @return {Boolean} Success or failure of the render
        */
        render: function (appendToNode, moduleElement) {

            var me = this,
                firstChild;

            function appendTo(parentNode) {
                if (typeof parentNode == "string") {
                    parentNode = document.getElementById(parentNode);
                }

                if (parentNode) {
                    me._addToParent(parentNode, me.element);
                    me.appendEvent.fire();
                }
            }

            this.beforeRenderEvent.fire();

            if (! moduleElement) {
                moduleElement = this.element;
            }

            if (appendToNode) {
                appendTo(appendToNode);
            } else { 
                // No node was passed in. If the element is not already in the Dom, this fails
                if (! Dom.inDocument(this.element)) {
                    return false;
                }
            }

            // Need to get everything into the DOM if it isn't already
            if (this.header && ! Dom.inDocument(this.header)) {
                // There is a header, but it's not in the DOM yet. Need to add it.
                firstChild = moduleElement.firstChild;
                if (firstChild) {
                    moduleElement.insertBefore(this.header, firstChild);
                } else {
                    moduleElement.appendChild(this.header);
                }
            }

            if (this.body && ! Dom.inDocument(this.body)) {
                // There is a body, but it's not in the DOM yet. Need to add it.		
                if (this.footer && Dom.isAncestor(this.moduleElement, this.footer)) {
                    moduleElement.insertBefore(this.body, this.footer);
                } else {
                    moduleElement.appendChild(this.body);
                }
            }

            if (this.footer && ! Dom.inDocument(this.footer)) {
                // There is a footer, but it's not in the DOM yet. Need to add it.
                moduleElement.appendChild(this.footer);
            }

            this.renderEvent.fire();
            return true;
        },

        /**
        * Removes the Module element from the DOM and sets all child elements 
        * to null.
        * @method destroy
        */
        destroy: function () {

            var parent,
                e;

            if (this.element) {
                Event.purgeElement(this.element, true);
                parent = this.element.parentNode;
            }

            if (parent) {
                parent.removeChild(this.element);
            }
        
            this.element = null;
            this.header = null;
            this.body = null;
            this.footer = null;

            Module.textResizeEvent.unsubscribe(this.onDomResize, this);

            this.cfg.destroy();
            this.cfg = null;

            this.destroyEvent.fire();
        },

        /**
        * Shows the Module element by setting the visible configuration 
        * property to true. Also fires two events: beforeShowEvent prior to 
        * the visibility change, and showEvent after.
        * @method show
        */
        show: function () {
            this.cfg.setProperty("visible", true);
        },

        /**
        * Hides the Module element by setting the visible configuration 
        * property to false. Also fires two events: beforeHideEvent prior to 
        * the visibility change, and hideEvent after.
        * @method hide
        */
        hide: function () {
            this.cfg.setProperty("visible", false);
        },
        
        // BUILT-IN EVENT HANDLERS FOR MODULE //
        /**
        * Default event handler for changing the visibility property of a 
        * Module. By default, this is achieved by switching the "display" style 
        * between "block" and "none".
        * This method is responsible for firing showEvent and hideEvent.
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        * @method configVisible
        */
        configVisible: function (type, args, obj) {
            var visible = args[0];
            if (visible) {
                this.beforeShowEvent.fire();
                Dom.setStyle(this.element, "display", "block");
                this.showEvent.fire();
            } else {
                this.beforeHideEvent.fire();
                Dom.setStyle(this.element, "display", "none");
                this.hideEvent.fire();
            }
        },
        
        /**
        * Default event handler for the "monitorresize" configuration property
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        * @method configMonitorResize
        */
        configMonitorResize: function (type, args, obj) {
            var monitor = args[0];
            if (monitor) {
                this.initResizeMonitor();
            } else {
                Module.textResizeEvent.unsubscribe(this.onDomResize, this, true);
                this.resizeMonitor = null;
            }
        },

        /**
         * This method is a protected helper, used when constructing the DOM structure for the module 
         * to account for situations which may cause Operation Aborted errors in IE. It should not 
         * be used for general DOM construction.
         * <p>
         * If the parentNode is not document.body, the element is appended as the last element.
         * </p>
         * <p>
         * If the parentNode is document.body the element is added as the first child to help
         * prevent Operation Aborted errors in IE.
         * </p>
         *
         * @param {parentNode} The HTML element to which the element will be added
         * @param {element} The HTML element to be added to parentNode's children
         * @method _addToParent
         * @protected
         */
        _addToParent: function(parentNode, element) {
            if (!this.cfg.getProperty("appendtodocumentbody") && parentNode === document.body && parentNode.firstChild) {
                parentNode.insertBefore(element, parentNode.firstChild);
            } else {
                parentNode.appendChild(element);
            }
        },

        /**
        * Returns a String representation of the Object.
        * @method toString
        * @return {String} The string representation of the Module
        */
        toString: function () {
            return "Module " + this.id;
        }
    };

    YAHOO.lang.augmentProto(Module, YAHOO.util.EventProvider);

}());

(function () {

    /**
    * Overlay is a Module that is absolutely positioned above the page flow. It 
    * has convenience methods for positioning and sizing, as well as options for 
    * controlling zIndex and constraining the Overlay's position to the current 
    * visible viewport. Overlay also contains a dynamicly generated IFRAME which 
    * is placed beneath it for Internet Explorer 6 and 5.x so that it will be 
    * properly rendered above SELECT elements.
    * @namespace YAHOO.widget
    * @class Overlay
    * @extends YAHOO.widget.Module
    * @param {String} el The element ID representing the Overlay <em>OR</em>
    * @param {HTMLElement} el The element representing the Overlay
    * @param {Object} userConfig The configuration object literal containing 
    * the configuration that should be set for this Overlay. See configuration 
    * documentation for more details.
    * @constructor
    */
    YAHOO.widget.Overlay = function (el, userConfig) {
        YAHOO.widget.Overlay.superclass.constructor.call(this, el, userConfig);
    };

    var Lang = YAHOO.lang,
        CustomEvent = YAHOO.util.CustomEvent,
        Module = YAHOO.widget.Module,
        Event = YAHOO.util.Event,
        Dom = YAHOO.util.Dom,
        Config = YAHOO.util.Config,
        UA = YAHOO.env.ua,
        Overlay = YAHOO.widget.Overlay,

        _SUBSCRIBE = "subscribe",
        _UNSUBSCRIBE = "unsubscribe",

        m_oIFrameTemplate,

        /**
        * Constant representing the name of the Overlay's events
        * @property EVENT_TYPES
        * @private
        * @final
        * @type Object
        */
        EVENT_TYPES = {
            "BEFORE_MOVE": "beforeMove",
            "MOVE": "move"
        },

        /**
        * Constant representing the Overlay's configuration properties
        * @property DEFAULT_CONFIG
        * @private
        * @final
        * @type Object
        */
        DEFAULT_CONFIG = {

            "X": { 
                key: "x", 
                validator: Lang.isNumber, 
                suppressEvent: true, 
                supercedes: ["iframe"]
            },

            "Y": { 
                key: "y", 
                validator: Lang.isNumber, 
                suppressEvent: true, 
                supercedes: ["iframe"]
            },

            "XY": { 
                key: "xy", 
                suppressEvent: true, 
                supercedes: ["iframe"] 
            },

            "CONTEXT": { 
                key: "context", 
                suppressEvent: true, 
                supercedes: ["iframe"] 
            },

            "FIXED_CENTER": { 
                key: "fixedcenter", 
                value: false, 
                validator: Lang.isBoolean, 
                supercedes: ["iframe", "visible"] 
            },

            "WIDTH": { 
                key: "width",
                suppressEvent: true,
                supercedes: ["context", "fixedcenter", "iframe"]
            }, 

            "HEIGHT": { 
                key: "height", 
                suppressEvent: true, 
                supercedes: ["context", "fixedcenter", "iframe"] 
            },

            "AUTO_FILL_HEIGHT" : {
                key: "autofillheight",
                supressEvent: true,
                supercedes: ["height"],
                value:"body"
            },

            "ZINDEX": { 
                key: "zindex", 
                value: null 
            },

            "CONSTRAIN_TO_VIEWPORT": { 
                key: "constraintoviewport", 
                value: false, 
                validator: Lang.isBoolean, 
                supercedes: ["iframe", "x", "y", "xy"]
            }, 

            "IFRAME": { 
                key: "iframe", 
                value: (UA.ie == 6 ? true : false), 
                validator: Lang.isBoolean, 
                supercedes: ["zindex"] 
            },
            
            "PREVENT_CONTEXT_OVERLAP": {
                key: "preventcontextoverlap",
                value: false,
                validator: Lang.isBoolean,  
                supercedes: ["constraintoviewport"]
            }
            
        };

    /**
    * The URL that will be placed in the iframe
    * @property YAHOO.widget.Overlay.IFRAME_SRC
    * @static
    * @final
    * @type String
    */
    Overlay.IFRAME_SRC = "javascript:false;";

    /**
    * Number representing how much the iframe shim should be offset from each 
    * side of an Overlay instance, in pixels.
    * @property YAHOO.widget.Overlay.IFRAME_SRC
    * @default 3
    * @static
    * @final
    * @type Number
    */
    Overlay.IFRAME_OFFSET = 3;

    /**
    * Number representing the minimum distance an Overlay instance should be 
    * positioned relative to the boundaries of the browser's viewport, in pixels.
    * @property YAHOO.widget.Overlay.VIEWPORT_OFFSET
    * @default 10
    * @static
    * @final
    * @type Number
    */
    Overlay.VIEWPORT_OFFSET = 10;

    /**
    * Constant representing the top left corner of an element, used for 
    * configuring the context element alignment
    * @property YAHOO.widget.Overlay.TOP_LEFT
    * @static
    * @final
    * @type String
    */
    Overlay.TOP_LEFT = "tl";

    /**
    * Constant representing the top right corner of an element, used for 
    * configuring the context element alignment
    * @property YAHOO.widget.Overlay.TOP_RIGHT
    * @static
    * @final
    * @type String
    */
    Overlay.TOP_RIGHT = "tr";

    /**
    * Constant representing the top bottom left corner of an element, used for 
    * configuring the context element alignment
    * @property YAHOO.widget.Overlay.BOTTOM_LEFT
    * @static
    * @final
    * @type String
    */
    Overlay.BOTTOM_LEFT = "bl";

    /**
    * Constant representing the bottom right corner of an element, used for 
    * configuring the context element alignment
    * @property YAHOO.widget.Overlay.BOTTOM_RIGHT
    * @static
    * @final
    * @type String
    */
    Overlay.BOTTOM_RIGHT = "br";

    /**
    * Constant representing the default CSS class used for an Overlay
    * @property YAHOO.widget.Overlay.CSS_OVERLAY
    * @static
    * @final
    * @type String
    */
    Overlay.CSS_OVERLAY = "yui-overlay";

    /**
     * Constant representing the names of the standard module elements
     * used in the overlay.
     * @property YAHOO.widget.Overlay.STD_MOD_RE
     * @static
     * @final
     * @type RegExp
     */
    Overlay.STD_MOD_RE = /^\s*?(body|footer|header)\s*?$/i;

    /**
    * A singleton CustomEvent used for reacting to the DOM event for 
    * window scroll
    * @event YAHOO.widget.Overlay.windowScrollEvent
    */
    Overlay.windowScrollEvent = new CustomEvent("windowScroll");

    /**
    * A singleton CustomEvent used for reacting to the DOM event for
    * window resize
    * @event YAHOO.widget.Overlay.windowResizeEvent
    */
    Overlay.windowResizeEvent = new CustomEvent("windowResize");

    /**
    * The DOM event handler used to fire the CustomEvent for window scroll
    * @method YAHOO.widget.Overlay.windowScrollHandler
    * @static
    * @param {DOMEvent} e The DOM scroll event
    */
    Overlay.windowScrollHandler = function (e) {
        var t = Event.getTarget(e);

        // - Webkit (Safari 2/3) and Opera 9.2x bubble scroll events from elements to window
        // - FF2/3 and IE6/7, Opera 9.5x don't bubble scroll events from elements to window
        // - IE doesn't recognize scroll registered on the document.
        //
        // Also, when document view is scrolled, IE doesn't provide a target, 
        // rest of the browsers set target to window.document, apart from opera 
        // which sets target to window.
        if (!t || t === window || t === window.document) {
            if (UA.ie) {

                if (! window.scrollEnd) {
                    window.scrollEnd = -1;
                }

                clearTimeout(window.scrollEnd);
        
                window.scrollEnd = setTimeout(function () { 
                    Overlay.windowScrollEvent.fire(); 
                }, 1);
        
            } else {
                Overlay.windowScrollEvent.fire();
            }
        }
    };

    /**
    * The DOM event handler used to fire the CustomEvent for window resize
    * @method YAHOO.widget.Overlay.windowResizeHandler
    * @static
    * @param {DOMEvent} e The DOM resize event
    */
    Overlay.windowResizeHandler = function (e) {

        if (UA.ie) {
            if (! window.resizeEnd) {
                window.resizeEnd = -1;
            }

            clearTimeout(window.resizeEnd);

            window.resizeEnd = setTimeout(function () {
                Overlay.windowResizeEvent.fire(); 
            }, 100);
        } else {
            Overlay.windowResizeEvent.fire();
        }
    };

    /**
    * A boolean that indicated whether the window resize and scroll events have 
    * already been subscribed to.
    * @property YAHOO.widget.Overlay._initialized
    * @private
    * @type Boolean
    */
    Overlay._initialized = null;

    if (Overlay._initialized === null) {
        Event.on(window, "scroll", Overlay.windowScrollHandler);
        Event.on(window, "resize", Overlay.windowResizeHandler);
        Overlay._initialized = true;
    }

    /**
     * Internal map of special event types, which are provided
     * by the instance. It maps the event type to the custom event 
     * instance. Contains entries for the "windowScroll", "windowResize" and
     * "textResize" static container events.
     *
     * @property YAHOO.widget.Overlay._TRIGGER_MAP
     * @type Object
     * @static
     * @private
     */
    Overlay._TRIGGER_MAP = {
        "windowScroll" : Overlay.windowScrollEvent,
        "windowResize" : Overlay.windowResizeEvent,
        "textResize"   : Module.textResizeEvent
    };

    YAHOO.extend(Overlay, Module, {

        /**
         * <p>
         * Array of default event types which will trigger
         * context alignment for the Overlay class.
         * </p>
         * <p>The array is empty by default for Overlay,
         * but maybe populated in future releases, so classes extending
         * Overlay which need to define their own set of CONTEXT_TRIGGERS
         * should concatenate their super class's prototype.CONTEXT_TRIGGERS 
         * value with their own array of values.
         * </p>
         * <p>
         * E.g.:
         * <code>CustomOverlay.prototype.CONTEXT_TRIGGERS = YAHOO.widget.Overlay.prototype.CONTEXT_TRIGGERS.concat(["windowScroll"]);</code>
         * </p>
         * 
         * @property CONTEXT_TRIGGERS
         * @type Array
         * @final
         */
        CONTEXT_TRIGGERS : [],

        /**
        * The Overlay initialization method, which is executed for Overlay and  
        * all of its subclasses. This method is automatically called by the 
        * constructor, and  sets up all DOM references for pre-existing markup, 
        * and creates required markup if it is not already present.
        * @method init
        * @param {String} el The element ID representing the Overlay <em>OR</em>
        * @param {HTMLElement} el The element representing the Overlay
        * @param {Object} userConfig The configuration object literal 
        * containing the configuration that should be set for this Overlay. 
        * See configuration documentation for more details.
        */
        init: function (el, userConfig) {

            /*
                 Note that we don't pass the user config in here yet because we
                 only want it executed once, at the lowest subclass level
            */

            Overlay.superclass.init.call(this, el/*, userConfig*/);

            this.beforeInitEvent.fire(Overlay);

            Dom.addClass(this.element, Overlay.CSS_OVERLAY);

            if (userConfig) {
                this.cfg.applyConfig(userConfig, true);
            }

            if (this.platform == "mac" && UA.gecko) {

                if (! Config.alreadySubscribed(this.showEvent,
                    this.showMacGeckoScrollbars, this)) {

                    this.showEvent.subscribe(this.showMacGeckoScrollbars, 
                        this, true);

                }

                if (! Config.alreadySubscribed(this.hideEvent, 
                    this.hideMacGeckoScrollbars, this)) {

                    this.hideEvent.subscribe(this.hideMacGeckoScrollbars, 
                        this, true);

                }
            }

            this.initEvent.fire(Overlay);
        },
        
        /**
        * Initializes the custom events for Overlay which are fired  
        * automatically at appropriate times by the Overlay class.
        * @method initEvents
        */
        initEvents: function () {

            Overlay.superclass.initEvents.call(this);

            var SIGNATURE = CustomEvent.LIST;

            /**
            * CustomEvent fired before the Overlay is moved.
            * @event beforeMoveEvent
            * @param {Number} x x coordinate
            * @param {Number} y y coordinate
            */
            this.beforeMoveEvent = this.createEvent(EVENT_TYPES.BEFORE_MOVE);
            this.beforeMoveEvent.signature = SIGNATURE;

            /**
            * CustomEvent fired after the Overlay is moved.
            * @event moveEvent
            * @param {Number} x x coordinate
            * @param {Number} y y coordinate
            */
            this.moveEvent = this.createEvent(EVENT_TYPES.MOVE);
            this.moveEvent.signature = SIGNATURE;

        },
        
        /**
        * Initializes the class's configurable properties which can be changed 
        * using the Overlay's Config object (cfg).
        * @method initDefaultConfig
        */
        initDefaultConfig: function () {
    
            Overlay.superclass.initDefaultConfig.call(this);

            var cfg = this.cfg;

            // Add overlay config properties //
            
            /**
            * The absolute x-coordinate position of the Overlay
            * @config x
            * @type Number
            * @default null
            */
            cfg.addProperty(DEFAULT_CONFIG.X.key, { 
    
                handler: this.configX, 
                validator: DEFAULT_CONFIG.X.validator, 
                suppressEvent: DEFAULT_CONFIG.X.suppressEvent, 
                supercedes: DEFAULT_CONFIG.X.supercedes
    
            });

            /**
            * The absolute y-coordinate position of the Overlay
            * @config y
            * @type Number
            * @default null
            */
            cfg.addProperty(DEFAULT_CONFIG.Y.key, {

                handler: this.configY, 
                validator: DEFAULT_CONFIG.Y.validator, 
                suppressEvent: DEFAULT_CONFIG.Y.suppressEvent, 
                supercedes: DEFAULT_CONFIG.Y.supercedes

            });

            /**
            * An array with the absolute x and y positions of the Overlay
            * @config xy
            * @type Number[]
            * @default null
            */
            cfg.addProperty(DEFAULT_CONFIG.XY.key, {
                handler: this.configXY, 
                suppressEvent: DEFAULT_CONFIG.XY.suppressEvent, 
                supercedes: DEFAULT_CONFIG.XY.supercedes
            });

            /**
            * <p>
            * The array of context arguments for context-sensitive positioning. 
            * </p>
            *
            * <p>
            * The format of the array is: <code>[contextElementOrId, overlayCorner, contextCorner, arrayOfTriggerEvents (optional)]</code>, the
            * the 4 array elements described in detail below:
            * </p>
            *
            * <dl>
            * <dt>contextElementOrId &#60;String|HTMLElement&#62;</dt>
            * <dd>A reference to the context element to which the overlay should be aligned (or it's id).</dd>
            * <dt>overlayCorner &#60;String&#62;</dt>
            * <dd>The corner of the overlay which is to be used for alignment. This corner will be aligned to the 
            * corner of the context element defined by the "contextCorner" entry which follows. Supported string values are: 
            * "tr" (top right), "tl" (top left), "br" (bottom right), or "bl" (bottom left).</dd>
            * <dt>contextCorner &#60;String&#62;</dt>
            * <dd>The corner of the context element which is to be used for alignment. Supported string values are the same ones listed for the "overlayCorner" entry above.</dd>
            * <dt>arrayOfTriggerEvents (optional) &#60;Array[String|CustomEvent]&#62;</dt>
            * <dd>
            * <p>
            * By default, context alignment is a one time operation, aligning the Overlay to the context element when context configuration property is set, or when the <a href="#method_align">align</a> 
            * method is invoked. However, you can use the optional "arrayOfTriggerEvents" entry to define the list of events which should force the overlay to re-align itself with the context element. 
            * This is useful in situations where the layout of the document may change, resulting in the context element's position being modified.
            * </p>
            * <p>
            * The array can contain either event type strings for events the instance publishes (e.g. "beforeShow") or CustomEvent instances. Additionally the following
            * 3 static container event types are also currently supported : <code>"windowResize", "windowScroll", "textResize"</code> (defined in <a href="#property__TRIGGER_MAP">_TRIGGER_MAP</a> private property).
            * </p>
            * </dd>
            * </dl>
            *
            * <p>
            * For example, setting this property to <code>["img1", "tl", "bl"]</code> will 
            * align the Overlay's top left corner to the bottom left corner of the
            * context element with id "img1".
            * </p>
            * <p>
            * Adding the optional trigger values: <code>["img1", "tl", "bl", ["beforeShow", "windowResize"]]</code>,
            * will re-align the overlay position, whenever the "beforeShow" or "windowResize" events are fired.
            * </p>
            *
            * @config context
            * @type Array
            * @default null
            */
            cfg.addProperty(DEFAULT_CONFIG.CONTEXT.key, {
                handler: this.configContext, 
                suppressEvent: DEFAULT_CONFIG.CONTEXT.suppressEvent, 
                supercedes: DEFAULT_CONFIG.CONTEXT.supercedes
            });

            /**
            * True if the Overlay should be anchored to the center of 
            * the viewport.
            * @config fixedcenter
            * @type Boolean
            * @default false
            */
            cfg.addProperty(DEFAULT_CONFIG.FIXED_CENTER.key, {
                handler: this.configFixedCenter,
                value: DEFAULT_CONFIG.FIXED_CENTER.value, 
                validator: DEFAULT_CONFIG.FIXED_CENTER.validator, 
                supercedes: DEFAULT_CONFIG.FIXED_CENTER.supercedes
            });
    
            /**
            * CSS width of the Overlay.
            * @config width
            * @type String
            * @default null
            */
            cfg.addProperty(DEFAULT_CONFIG.WIDTH.key, {
                handler: this.configWidth, 
                suppressEvent: DEFAULT_CONFIG.WIDTH.suppressEvent, 
                supercedes: DEFAULT_CONFIG.WIDTH.supercedes
            });

            /**
            * CSS height of the Overlay.
            * @config height
            * @type String
            * @default null
            */
            cfg.addProperty(DEFAULT_CONFIG.HEIGHT.key, {
                handler: this.configHeight, 
                suppressEvent: DEFAULT_CONFIG.HEIGHT.suppressEvent, 
                supercedes: DEFAULT_CONFIG.HEIGHT.supercedes
            });

            /**
            * Standard module element which should auto fill out the height of the Overlay if the height config property is set.
            * Supported values are "header", "body", "footer".
            *
            * @config autofillheight
            * @type String
            * @default null
            */
            cfg.addProperty(DEFAULT_CONFIG.AUTO_FILL_HEIGHT.key, {
                handler: this.configAutoFillHeight, 
                value : DEFAULT_CONFIG.AUTO_FILL_HEIGHT.value,
                validator : this._validateAutoFill,
                suppressEvent: DEFAULT_CONFIG.AUTO_FILL_HEIGHT.suppressEvent, 
                supercedes: DEFAULT_CONFIG.AUTO_FILL_HEIGHT.supercedes
            });

            /**
            * CSS z-index of the Overlay.
            * @config zIndex
            * @type Number
            * @default null
            */
            cfg.addProperty(DEFAULT_CONFIG.ZINDEX.key, {
                handler: this.configzIndex,
                value: DEFAULT_CONFIG.ZINDEX.value
            });

            /**
            * True if the Overlay should be prevented from being positioned 
            * out of the viewport.
            * @config constraintoviewport
            * @type Boolean
            * @default false
            */
            cfg.addProperty(DEFAULT_CONFIG.CONSTRAIN_TO_VIEWPORT.key, {

                handler: this.configConstrainToViewport, 
                value: DEFAULT_CONFIG.CONSTRAIN_TO_VIEWPORT.value, 
                validator: DEFAULT_CONFIG.CONSTRAIN_TO_VIEWPORT.validator, 
                supercedes: DEFAULT_CONFIG.CONSTRAIN_TO_VIEWPORT.supercedes

            });

            /**
            * @config iframe
            * @description Boolean indicating whether or not the Overlay should 
            * have an IFRAME shim; used to prevent SELECT elements from 
            * poking through an Overlay instance in IE6.  When set to "true", 
            * the iframe shim is created when the Overlay instance is intially
            * made visible.
            * @type Boolean
            * @default true for IE6 and below, false for all other browsers.
            */
            cfg.addProperty(DEFAULT_CONFIG.IFRAME.key, {

                handler: this.configIframe, 
                value: DEFAULT_CONFIG.IFRAME.value, 
                validator: DEFAULT_CONFIG.IFRAME.validator, 
                supercedes: DEFAULT_CONFIG.IFRAME.supercedes

            });

            /**
            * @config preventcontextoverlap
            * @description Boolean indicating whether or not the Overlay should overlap its 
            * context element (defined using the "context" configuration property) when the 
            * "constraintoviewport" configuration property is set to "true".
            * @type Boolean
            * @default false
            */
            cfg.addProperty(DEFAULT_CONFIG.PREVENT_CONTEXT_OVERLAP.key, {

                value: DEFAULT_CONFIG.PREVENT_CONTEXT_OVERLAP.value, 
                validator: DEFAULT_CONFIG.PREVENT_CONTEXT_OVERLAP.validator, 
                supercedes: DEFAULT_CONFIG.PREVENT_CONTEXT_OVERLAP.supercedes

            });

        },

        /**
        * Moves the Overlay to the specified position. This function is  
        * identical to calling this.cfg.setProperty("xy", [x,y]);
        * @method moveTo
        * @param {Number} x The Overlay's new x position
        * @param {Number} y The Overlay's new y position
        */
        moveTo: function (x, y) {
            this.cfg.setProperty("xy", [x, y]);
        },

        /**
        * Adds a CSS class ("hide-scrollbars") and removes a CSS class 
        * ("show-scrollbars") to the Overlay to fix a bug in Gecko on Mac OS X 
        * (https://bugzilla.mozilla.org/show_bug.cgi?id=187435)
        * @method hideMacGeckoScrollbars
        */
        hideMacGeckoScrollbars: function () {
            Dom.replaceClass(this.element, "show-scrollbars", "hide-scrollbars");
        },

        /**
        * Adds a CSS class ("show-scrollbars") and removes a CSS class 
        * ("hide-scrollbars") to the Overlay to fix a bug in Gecko on Mac OS X 
        * (https://bugzilla.mozilla.org/show_bug.cgi?id=187435)
        * @method showMacGeckoScrollbars
        */
        showMacGeckoScrollbars: function () {
            Dom.replaceClass(this.element, "hide-scrollbars", "show-scrollbars");
        },

        // BEGIN BUILT-IN PROPERTY EVENT HANDLERS //
        /**
        * The default event handler fired when the "visible" property is 
        * changed.  This method is responsible for firing showEvent
        * and hideEvent.
        * @method configVisible
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configVisible: function (type, args, obj) {

            var visible = args[0],
                currentVis = Dom.getStyle(this.element, "visibility"),
                effect = this.cfg.getProperty("effect"),
                effectInstances = [],
                isMacGecko = (this.platform == "mac" && UA.gecko),
                alreadySubscribed = Config.alreadySubscribed,
                eff, ei, e, i, j, k, h,
                nEffects,
                nEffectInstances;

            if (currentVis == "inherit") {
                e = this.element.parentNode;

                while (e.nodeType != 9 && e.nodeType != 11) {
                    currentVis = Dom.getStyle(e, "visibility");

                    if (currentVis != "inherit") { 
                        break; 
                    }

                    e = e.parentNode;
                }

                if (currentVis == "inherit") {
                    currentVis = "visible";
                }
            }

            if (effect) {
                if (effect instanceof Array) {
                    nEffects = effect.length;

                    for (i = 0; i < nEffects; i++) {
                        eff = effect[i];
                        effectInstances[effectInstances.length] = 
                            eff.effect(this, eff.duration);

                    }
                } else {
                    effectInstances[effectInstances.length] = 
                        effect.effect(this, effect.duration);
                }
            }


            if (visible) { // Show
                if (isMacGecko) {
                    this.showMacGeckoScrollbars();
                }

                if (effect) { // Animate in
                    if (visible) { // Animate in if not showing
                        if (currentVis != "visible" || currentVis === "") {
                            this.beforeShowEvent.fire();
                            nEffectInstances = effectInstances.length;

                            for (j = 0; j < nEffectInstances; j++) {
                                ei = effectInstances[j];
                                if (j === 0 && !alreadySubscribed(
                                        ei.animateInCompleteEvent, 
                                        this.showEvent.fire, this.showEvent)) {

                                    /*
                                         Delegate showEvent until end 
                                         of animateInComplete
                                    */

                                    ei.animateInCompleteEvent.subscribe(
                                     this.showEvent.fire, this.showEvent, true);
                                }
                                ei.animateIn();
                            }
                        }
                    }
                } else { // Show
                    if (currentVis != "visible" || currentVis === "") {
                        this.beforeShowEvent.fire();

                        Dom.setStyle(this.element, "visibility", "visible");

                        this.cfg.refireEvent("iframe");
                        this.showEvent.fire();
                    }
                }
            } else { // Hide

                if (isMacGecko) {
                    this.hideMacGeckoScrollbars();
                }
                    
                if (effect) { // Animate out if showing
                    if (currentVis == "visible") {
                        this.beforeHideEvent.fire();

                        nEffectInstances = effectInstances.length;
                        for (k = 0; k < nEffectInstances; k++) {
                            h = effectInstances[k];
    
                            if (k === 0 && !alreadySubscribed(
                                h.animateOutCompleteEvent, this.hideEvent.fire, 
                                this.hideEvent)) {
    
                                /*
                                     Delegate hideEvent until end 
                                     of animateOutComplete
                                */
    
                                h.animateOutCompleteEvent.subscribe(
                                    this.hideEvent.fire, this.hideEvent, true);
    
                            }
                            h.animateOut();
                        }

                    } else if (currentVis === "") {
                        Dom.setStyle(this.element, "visibility", "hidden");
                    }

                } else { // Simple hide

                    if (currentVis == "visible" || currentVis === "") {
                        this.beforeHideEvent.fire();
                        Dom.setStyle(this.element, "visibility", "hidden");
                        this.hideEvent.fire();
                    }
                }
            }
        },

        /**
        * Center event handler used for centering on scroll/resize, but only if 
        * the Overlay is visible
        * @method doCenterOnDOMEvent
        */
        doCenterOnDOMEvent: function () {
            if (this.cfg.getProperty("visible")) {
                this.center();
            }
        },

        /**
        * The default event handler fired when the "fixedcenter" property 
        * is changed.
        * @method configFixedCenter
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configFixedCenter: function (type, args, obj) {

            var val = args[0],
                alreadySubscribed = Config.alreadySubscribed,
                windowResizeEvent = Overlay.windowResizeEvent,
                windowScrollEvent = Overlay.windowScrollEvent;

            if (val) {
                this.center();

                if (!alreadySubscribed(this.beforeShowEvent, this.center, this)) {
                    this.beforeShowEvent.subscribe(this.center);
                }

                if (!alreadySubscribed(windowResizeEvent, this.doCenterOnDOMEvent, this)) {
                    windowResizeEvent.subscribe(this.doCenterOnDOMEvent, this, true);
                }

                if (!alreadySubscribed(windowScrollEvent, this.doCenterOnDOMEvent, this)) {
                    windowScrollEvent.subscribe(this.doCenterOnDOMEvent, this, true);
                }

            } else {
                this.beforeShowEvent.unsubscribe(this.center);

                windowResizeEvent.unsubscribe(this.doCenterOnDOMEvent, this);
                windowScrollEvent.unsubscribe(this.doCenterOnDOMEvent, this);
            }
        },
        
        /**
        * The default event handler fired when the "height" property is changed.
        * @method configHeight
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configHeight: function (type, args, obj) {

            var height = args[0],
                el = this.element;

            Dom.setStyle(el, "height", height);
            this.cfg.refireEvent("iframe");
        },

        /**
         * The default event handler fired when the "autofillheight" property is changed.
         * @method configAutoFillHeight
         *
         * @param {String} type The CustomEvent type (usually the property name)
         * @param {Object[]} args The CustomEvent arguments. For configuration 
         * handlers, args[0] will equal the newly applied value for the property.
         * @param {Object} obj The scope object. For configuration handlers, 
         * this will usually equal the owner.
         */
        configAutoFillHeight: function (type, args, obj) {
            var fillEl = args[0],
                currEl = this.cfg.getProperty("autofillheight");

            this.cfg.unsubscribeFromConfigEvent("height", this._autoFillOnHeightChange);
            Module.textResizeEvent.unsubscribe("height", this._autoFillOnHeightChange);

            if (currEl && fillEl !== currEl && this[currEl]) {
                Dom.setStyle(this[currEl], "height", "");
            }

            if (fillEl) {
                fillEl = Lang.trim(fillEl.toLowerCase());

                this.cfg.subscribeToConfigEvent("height", this._autoFillOnHeightChange, this[fillEl], this);
                Module.textResizeEvent.subscribe(this._autoFillOnHeightChange, this[fillEl], this);

                this.cfg.setProperty("autofillheight", fillEl, true);
            }
        },

        /**
        * The default event handler fired when the "width" property is changed.
        * @method configWidth
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configWidth: function (type, args, obj) {

            var width = args[0],
                el = this.element;

            Dom.setStyle(el, "width", width);
            this.cfg.refireEvent("iframe");
        },

        /**
        * The default event handler fired when the "zIndex" property is changed.
        * @method configzIndex
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configzIndex: function (type, args, obj) {

            var zIndex = args[0],
                el = this.element;

            if (! zIndex) {
                zIndex = Dom.getStyle(el, "zIndex");
                if (! zIndex || isNaN(zIndex)) {
                    zIndex = 0;
                }
            }

            if (this.iframe || this.cfg.getProperty("iframe") === true) {
                if (zIndex <= 0) {
                    zIndex = 1;
                }
            }

            Dom.setStyle(el, "zIndex", zIndex);
            this.cfg.setProperty("zIndex", zIndex, true);

            if (this.iframe) {
                this.stackIframe();
            }
        },

        /**
        * The default event handler fired when the "xy" property is changed.
        * @method configXY
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configXY: function (type, args, obj) {

            var pos = args[0],
                x = pos[0],
                y = pos[1];

            this.cfg.setProperty("x", x);
            this.cfg.setProperty("y", y);

            this.beforeMoveEvent.fire([x, y]);

            x = this.cfg.getProperty("x");
            y = this.cfg.getProperty("y");


            this.cfg.refireEvent("iframe");
            this.moveEvent.fire([x, y]);
        },

        /**
        * The default event handler fired when the "x" property is changed.
        * @method configX
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configX: function (type, args, obj) {

            var x = args[0],
                y = this.cfg.getProperty("y");

            this.cfg.setProperty("x", x, true);
            this.cfg.setProperty("y", y, true);

            this.beforeMoveEvent.fire([x, y]);

            x = this.cfg.getProperty("x");
            y = this.cfg.getProperty("y");
            
            Dom.setX(this.element, x, true);

            this.cfg.setProperty("xy", [x, y], true);

            this.cfg.refireEvent("iframe");
            this.moveEvent.fire([x, y]);
        },

        /**
        * The default event handler fired when the "y" property is changed.
        * @method configY
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configY: function (type, args, obj) {

            var x = this.cfg.getProperty("x"),
                y = args[0];

            this.cfg.setProperty("x", x, true);
            this.cfg.setProperty("y", y, true);

            this.beforeMoveEvent.fire([x, y]);

            x = this.cfg.getProperty("x");
            y = this.cfg.getProperty("y");

            Dom.setY(this.element, y, true);

            this.cfg.setProperty("xy", [x, y], true);

            this.cfg.refireEvent("iframe");
            this.moveEvent.fire([x, y]);
        },
        
        /**
        * Shows the iframe shim, if it has been enabled.
        * @method showIframe
        */
        showIframe: function () {

            var oIFrame = this.iframe,
                oParentNode;

            if (oIFrame) {
                oParentNode = this.element.parentNode;

                if (oParentNode != oIFrame.parentNode) {
                    this._addToParent(oParentNode, oIFrame);
                }
                oIFrame.style.display = "block";
            }
        },

        /**
        * Hides the iframe shim, if it has been enabled.
        * @method hideIframe
        */
        hideIframe: function () {
            if (this.iframe) {
                this.iframe.style.display = "none";
            }
        },

        /**
        * Syncronizes the size and position of iframe shim to that of its 
        * corresponding Overlay instance.
        * @method syncIframe
        */
        syncIframe: function () {

            var oIFrame = this.iframe,
                oElement = this.element,
                nOffset = Overlay.IFRAME_OFFSET,
                nDimensionOffset = (nOffset * 2),
                aXY;

            if (oIFrame) {
                // Size <iframe>
                oIFrame.style.width = (oElement.offsetWidth + nDimensionOffset + "px");
                oIFrame.style.height = (oElement.offsetHeight + nDimensionOffset + "px");

                // Position <iframe>
                aXY = this.cfg.getProperty("xy");

                if (!Lang.isArray(aXY) || (isNaN(aXY[0]) || isNaN(aXY[1]))) {
                    this.syncPosition();
                    aXY = this.cfg.getProperty("xy");
                }
                Dom.setXY(oIFrame, [(aXY[0] - nOffset), (aXY[1] - nOffset)]);
            }
        },

        /**
         * Sets the zindex of the iframe shim, if it exists, based on the zindex of
         * the Overlay element. The zindex of the iframe is set to be one less 
         * than the Overlay element's zindex.
         * 
         * <p>NOTE: This method will not bump up the zindex of the Overlay element
         * to ensure that the iframe shim has a non-negative zindex.
         * If you require the iframe zindex to be 0 or higher, the zindex of 
         * the Overlay element should be set to a value greater than 0, before 
         * this method is called.
         * </p>
         * @method stackIframe
         */
        stackIframe: function () {
            if (this.iframe) {
                var overlayZ = Dom.getStyle(this.element, "zIndex");
                if (!YAHOO.lang.isUndefined(overlayZ) && !isNaN(overlayZ)) {
                    Dom.setStyle(this.iframe, "zIndex", (overlayZ - 1));
                }
            }
        },

        /**
        * The default event handler fired when the "iframe" property is changed.
        * @method configIframe
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configIframe: function (type, args, obj) {

            var bIFrame = args[0];

            function createIFrame() {

                var oIFrame = this.iframe,
                    oElement = this.element,
                    oParent;

                if (!oIFrame) {
                    if (!m_oIFrameTemplate) {
                        m_oIFrameTemplate = document.createElement("iframe");

                        if (this.isSecure) {
                            m_oIFrameTemplate.src = Overlay.IFRAME_SRC;
                        }

                        /*
                            Set the opacity of the <iframe> to 0 so that it 
                            doesn't modify the opacity of any transparent 
                            elements that may be on top of it (like a shadow).
                        */
                        if (UA.ie) {
                            m_oIFrameTemplate.style.filter = "alpha(opacity=0)";
                            /*
                                 Need to set the "frameBorder" property to 0 
                                 supress the default <iframe> border in IE.  
                                 Setting the CSS "border" property alone 
                                 doesn't supress it.
                            */
                            m_oIFrameTemplate.frameBorder = 0;
                        }
                        else {
                            m_oIFrameTemplate.style.opacity = "0";
                        }

                        m_oIFrameTemplate.style.position = "absolute";
                        m_oIFrameTemplate.style.border = "none";
                        m_oIFrameTemplate.style.margin = "0";
                        m_oIFrameTemplate.style.padding = "0";
                        m_oIFrameTemplate.style.display = "none";
                    }

                    oIFrame = m_oIFrameTemplate.cloneNode(false);
                    oParent = oElement.parentNode;

                    var parentNode = oParent || document.body;

                    this._addToParent(parentNode, oIFrame);
                    this.iframe = oIFrame;
                }

                /*
                     Show the <iframe> before positioning it since the "setXY" 
                     method of DOM requires the element be in the document 
                     and visible.
                */
                this.showIframe();

                /*
                     Syncronize the size and position of the <iframe> to that 
                     of the Overlay.
                */
                this.syncIframe();
                this.stackIframe();

                // Add event listeners to update the <iframe> when necessary
                if (!this._hasIframeEventListeners) {
                    this.showEvent.subscribe(this.showIframe);
                    this.hideEvent.subscribe(this.hideIframe);
                    this.changeContentEvent.subscribe(this.syncIframe);

                    this._hasIframeEventListeners = true;
                }
            }

            function onBeforeShow() {
                createIFrame.call(this);
                this.beforeShowEvent.unsubscribe(onBeforeShow);
                this._iframeDeferred = false;
            }

            if (bIFrame) { // <iframe> shim is enabled

                if (this.cfg.getProperty("visible")) {
                    createIFrame.call(this);
                } else {
                    if (!this._iframeDeferred) {
                        this.beforeShowEvent.subscribe(onBeforeShow);
                        this._iframeDeferred = true;
                    }
                }

            } else {    // <iframe> shim is disabled
                this.hideIframe();

                if (this._hasIframeEventListeners) {
                    this.showEvent.unsubscribe(this.showIframe);
                    this.hideEvent.unsubscribe(this.hideIframe);
                    this.changeContentEvent.unsubscribe(this.syncIframe);

                    this._hasIframeEventListeners = false;
                }
            }
        },

        /**
         * Set's the container's XY value from DOM if not already set.
         * 
         * Differs from syncPosition, in that the XY value is only sync'd with DOM if 
         * not already set. The method also refire's the XY config property event, so any
         * beforeMove, Move event listeners are invoked.
         * 
         * @method _primeXYFromDOM
         * @protected
         */
        _primeXYFromDOM : function() {
            if (YAHOO.lang.isUndefined(this.cfg.getProperty("xy"))) {
                // Set CFG XY based on DOM XY
                this.syncPosition();
                // Account for XY being set silently in syncPosition (no moveTo fired/called)
                this.cfg.refireEvent("xy");
                this.beforeShowEvent.unsubscribe(this._primeXYFromDOM);
            }
        },

        /**
        * The default event handler fired when the "constraintoviewport" 
        * property is changed.
        * @method configConstrainToViewport
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for 
        * the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configConstrainToViewport: function (type, args, obj) {
            var val = args[0];

            if (val) {
                if (! Config.alreadySubscribed(this.beforeMoveEvent, this.enforceConstraints, this)) {
                    this.beforeMoveEvent.subscribe(this.enforceConstraints, this, true);
                }
                if (! Config.alreadySubscribed(this.beforeShowEvent, this._primeXYFromDOM)) {
                    this.beforeShowEvent.subscribe(this._primeXYFromDOM);
                }
            } else {
                this.beforeShowEvent.unsubscribe(this._primeXYFromDOM);
                this.beforeMoveEvent.unsubscribe(this.enforceConstraints, this);
            }
        },

         /**
        * The default event handler fired when the "context" property
        * is changed.
        * 
        * @method configContext
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configContext: function (type, args, obj) {

            var contextArgs = args[0],
                contextEl,
                elementMagnetCorner,
                contextMagnetCorner,
                triggers,
                defTriggers = this.CONTEXT_TRIGGERS;

            if (contextArgs) {

                contextEl = contextArgs[0];
                elementMagnetCorner = contextArgs[1];
                contextMagnetCorner = contextArgs[2];
                triggers = contextArgs[3];

                if (defTriggers && defTriggers.length > 0) {
                    triggers = (triggers || []).concat(defTriggers);
                }

                if (contextEl) {
                    if (typeof contextEl == "string") {
                        this.cfg.setProperty("context", [
                                document.getElementById(contextEl), 
                                elementMagnetCorner,
                                contextMagnetCorner,
                                triggers ],
                                true);
                    }

                    if (elementMagnetCorner && contextMagnetCorner) {
                        this.align(elementMagnetCorner, contextMagnetCorner);
                    }

                    if (this._contextTriggers) {
                        // Unsubscribe Old Set
                        this._processTriggers(this._contextTriggers, _UNSUBSCRIBE, this._alignOnTrigger);
                    }

                    if (triggers) {
                        // Subscribe New Set
                        this._processTriggers(triggers, _SUBSCRIBE, this._alignOnTrigger);
                        this._contextTriggers = triggers;
                    }
                }
            }
        },

        /**
         * Custom Event handler for context alignment triggers. Invokes the align method
         * 
         * @method _alignOnTrigger
         * @protected
         * 
         * @param {String} type The event type (not used by the default implementation)
         * @param {Any[]} args The array of arguments for the trigger event (not used by the default implementation)
         */
        _alignOnTrigger: function(type, args) {
            this.align();
        },

        /**
         * Helper method to locate the custom event instance for the event name string
         * passed in. As a convenience measure, any custom events passed in are returned.
         *
         * @method _findTriggerCE
         * @private
         *
         * @param {String|CustomEvent} t Either a CustomEvent, or event type (e.g. "windowScroll") for which a 
         * custom event instance needs to be looked up from the Overlay._TRIGGER_MAP.
         */
        _findTriggerCE : function(t) {
            var tce = null;
            if (t instanceof CustomEvent) {
                tce = t;
            } else if (Overlay._TRIGGER_MAP[t]) {
                tce = Overlay._TRIGGER_MAP[t];
            }
            return tce;
        },

        /**
         * Utility method that subscribes or unsubscribes the given 
         * function from the list of trigger events provided.
         *
         * @method _processTriggers
         * @protected 
         *
         * @param {Array[String|CustomEvent]} triggers An array of either CustomEvents, event type strings 
         * (e.g. "beforeShow", "windowScroll") to/from which the provided function should be 
         * subscribed/unsubscribed respectively.
         *
         * @param {String} mode Either "subscribe" or "unsubscribe", specifying whether or not
         * we are subscribing or unsubscribing trigger listeners
         * 
         * @param {Function} fn The function to be subscribed/unsubscribed to/from the trigger event.
         * Context is always set to the overlay instance, and no additional object argument 
         * get passed to the subscribed function.
         */
        _processTriggers : function(triggers, mode, fn) {
            var t, tce;

            for (var i = 0, l = triggers.length; i < l; ++i) {
                t = triggers[i];
                tce = this._findTriggerCE(t);
                if (tce) {
                    tce[mode](fn, this, true);
                } else {
                    this[mode](t, fn);
                }
            }
        },

        // END BUILT-IN PROPERTY EVENT HANDLERS //
        /**
        * Aligns the Overlay to its context element using the specified corner 
        * points (represented by the constants TOP_LEFT, TOP_RIGHT, BOTTOM_LEFT, 
        * and BOTTOM_RIGHT.
        * @method align
        * @param {String} elementAlign  The String representing the corner of 
        * the Overlay that should be aligned to the context element
        * @param {String} contextAlign  The corner of the context element 
        * that the elementAlign corner should stick to.
        */
        align: function (elementAlign, contextAlign) {

            var contextArgs = this.cfg.getProperty("context"),
                me = this,
                context,
                element,
                contextRegion;

            function doAlign(v, h) {
    
                switch (elementAlign) {
    
                case Overlay.TOP_LEFT:
                    me.moveTo(h, v);
                    break;
    
                case Overlay.TOP_RIGHT:
                    me.moveTo((h - element.offsetWidth), v);
                    break;
    
                case Overlay.BOTTOM_LEFT:
                    me.moveTo(h, (v - element.offsetHeight));
                    break;
    
                case Overlay.BOTTOM_RIGHT:
                    me.moveTo((h - element.offsetWidth), 
                        (v - element.offsetHeight));
                    break;
                }
            }
    
    
            if (contextArgs) {
            
                context = contextArgs[0];
                element = this.element;
                me = this;
                
                if (! elementAlign) {
                    elementAlign = contextArgs[1];
                }
                
                if (! contextAlign) {
                    contextAlign = contextArgs[2];
                }
                
                if (element && context) {
                    contextRegion = Dom.getRegion(context);

                    switch (contextAlign) {
    
                    case Overlay.TOP_LEFT:
                        doAlign(contextRegion.top, contextRegion.left);
                        break;
    
                    case Overlay.TOP_RIGHT:
                        doAlign(contextRegion.top, contextRegion.right);
                        break;
    
                    case Overlay.BOTTOM_LEFT:
                        doAlign(contextRegion.bottom, contextRegion.left);
                        break;
    
                    case Overlay.BOTTOM_RIGHT:
                        doAlign(contextRegion.bottom, contextRegion.right);
                        break;
                    }
    
                }
    
            }
            
        },

        /**
        * The default event handler executed when the moveEvent is fired, if the 
        * "constraintoviewport" is set to true.
        * @method enforceConstraints
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        enforceConstraints: function (type, args, obj) {
            var pos = args[0];
            
            var cXY = this.getConstrainedXY(pos[0], pos[1]);
            this.cfg.setProperty("x", cXY[0], true);
            this.cfg.setProperty("y", cXY[1], true);
            this.cfg.setProperty("xy", cXY, true);
        },


        /**
         * Given x coordinate value, returns the calculated x coordinate required to 
         * position the Overlay if it is to be constrained to the viewport, based on the 
         * current element size, viewport dimensions and scroll values.
         *
         * @param {Number} x The X coordinate value to be constrained
         * @return {Number} The constrained x coordinate
         */		
        getConstrainedX: function (x) {

            var oOverlay = this,
                oOverlayEl = oOverlay.element,
                nOverlayOffsetWidth = oOverlayEl.offsetWidth,

                nViewportOffset = Overlay.VIEWPORT_OFFSET,
                viewPortWidth = Dom.getViewportWidth(),
                scrollX = Dom.getDocumentScrollLeft(),

                bCanConstrain = (nOverlayOffsetWidth + nViewportOffset < viewPortWidth),

                aContext = this.cfg.getProperty("context"),
                oContextEl,
                nContextElX,
                nContextElWidth,

                bFlipped = false,

                nLeftRegionWidth,
                nRightRegionWidth,

                leftConstraint,
                rightConstraint,

                xNew = x,

                oOverlapPositions = {

                    "tltr": true,
                    "blbr": true,
                    "brbl": true,
                    "trtl": true
                
                };


            var flipHorizontal = function () {
            
                var nNewX;
            
                if ((oOverlay.cfg.getProperty("x") - scrollX) > nContextElX) {
                    nNewX = (nContextElX - nOverlayOffsetWidth);
                }
                else {
                    nNewX = (nContextElX + nContextElWidth);
                }
                
    
                oOverlay.cfg.setProperty("x", (nNewX + scrollX), true);
    
                return nNewX;
    
            };



            /*
                 Uses the context element's position to calculate the availble width 
                 to the right and left of it to display its corresponding Overlay.
            */

            var getDisplayRegionWidth = function () {

                // The Overlay is to the right of the context element

                if ((oOverlay.cfg.getProperty("x") - scrollX) > nContextElX) {
                    return (nRightRegionWidth - nViewportOffset);
                }
                else {	// The Overlay is to the left of the context element
                    return (nLeftRegionWidth - nViewportOffset);
                }
            
            };
    

            /*
                Positions the Overlay to the left or right of the context element so that it remains 
                inside the viewport.
            */
    
            var setHorizontalPosition = function () {
            
                var nDisplayRegionWidth = getDisplayRegionWidth(),
                    fnReturnVal;

                if (nOverlayOffsetWidth > nDisplayRegionWidth) {
        
                    if (bFlipped) {
        
                        /*
                             All possible positions and values have been 
                             tried, but none were successful, so fall back 
                             to the original size and position.
                        */
    
                        flipHorizontal();
                        
                    }
                    else {
        
                        flipHorizontal();

                        bFlipped = true;
        
                        fnReturnVal = setHorizontalPosition();
        
                    }
                
                }
        
                return fnReturnVal;
            
            };


            if (this.cfg.getProperty("preventcontextoverlap") && aContext && 
				oOverlapPositions[(aContext[1] + aContext[2])]) {

                if (bCanConstrain) {

                    oContextEl = aContext[0];
                    nContextElX = Dom.getX(oContextEl) - scrollX;
                    nContextElWidth = oContextEl.offsetWidth;
                    nLeftRegionWidth = nContextElX;
                    nRightRegionWidth = (viewPortWidth - (nContextElX + nContextElWidth));
    
                    setHorizontalPosition();

                }
                
                xNew = this.cfg.getProperty("x");
            
            }
            else {

                if (bCanConstrain) {
    
                    leftConstraint = scrollX + nViewportOffset;
                    rightConstraint = 
                        scrollX + viewPortWidth - nOverlayOffsetWidth - nViewportOffset;
    
                    if (x < leftConstraint) {
                        xNew = leftConstraint;
                    } else if (x > rightConstraint) {
                        xNew = rightConstraint;
                    }
                } else {
                    xNew = nViewportOffset + scrollX;
                }
            
            }

            return xNew;
        
        },


        /**
         * Given y coordinate value, returns the calculated y coordinate required to 
         * position the Overlay if it is to be constrained to the viewport, based on the 
         * current element size, viewport dimensions and scroll values.
         *
         * @param {Number} y The Y coordinate value to be constrained
         * @return {Number} The constrained y coordinate
         */		
        getConstrainedY: function (y) {

            var oOverlay = this,
                oOverlayEl = oOverlay.element,
                nOverlayOffsetHeight = oOverlayEl.offsetHeight,
            
                nViewportOffset = Overlay.VIEWPORT_OFFSET,
                viewPortHeight = Dom.getViewportHeight(),
                scrollY = Dom.getDocumentScrollTop(),

                bCanConstrain = (nOverlayOffsetHeight + nViewportOffset < viewPortHeight),

                aContext = this.cfg.getProperty("context"),
                oContextEl,
                nContextElY,
                nContextElHeight,

                bFlipped = false,

                nTopRegionHeight,
                nBottomRegionHeight,

                topConstraint,
                bottomConstraint,

                yNew = y,
                
                oOverlapPositions = {
                    "trbr": true,
                    "tlbl": true,
                    "bltl": true,
                    "brtr": true
                };


            var flipVertical = function () {

                var nNewY;
            
                // The Overlay is below the context element, flip it above
                if ((oOverlay.cfg.getProperty("y") - scrollY) > nContextElY) { 
                    nNewY = (nContextElY - nOverlayOffsetHeight);
                }
                else {	// The Overlay is above the context element, flip it below
                    nNewY = (nContextElY + nContextElHeight);
                }
    
                oOverlay.cfg.setProperty("y", (nNewY + scrollY), true);
                
                return nNewY;
            
            };


            /*
                 Uses the context element's position to calculate the availble height 
                 above and below it to display its corresponding Overlay.
            */

            var getDisplayRegionHeight = function () {

                // The Overlay is below the context element
                if ((oOverlay.cfg.getProperty("y") - scrollY) > nContextElY) {
                    return (nBottomRegionHeight - nViewportOffset);				
                }
                else {	// The Overlay is above the context element
                    return (nTopRegionHeight - nViewportOffset);				
                }
        
            };


            /*
                Trys to place the Overlay in the best possible position (either above or 
                below its corresponding context element).
            */
        
            var setVerticalPosition = function () {
        
                var nDisplayRegionHeight = getDisplayRegionHeight(),
                    fnReturnVal;
                    

                if (nOverlayOffsetHeight > nDisplayRegionHeight) {
                   
                    if (bFlipped) {
        
                        /*
                             All possible positions and values for the 
                             "maxheight" configuration property have been 
                             tried, but none were successful, so fall back 
                             to the original size and position.
                        */
    
                        flipVertical();
                        
                    }
                    else {
        
                        flipVertical();

                        bFlipped = true;
        
                        fnReturnVal = setVerticalPosition();
        
                    }
                
                }
        
                return fnReturnVal;
        
            };


            if (this.cfg.getProperty("preventcontextoverlap") && aContext && 
            	oOverlapPositions[(aContext[1] + aContext[2])]) {

                if (bCanConstrain) {

                    oContextEl = aContext[0];
                    nContextElHeight = oContextEl.offsetHeight;
                    nContextElY = (Dom.getY(oContextEl) - scrollY);
    
                    nTopRegionHeight = nContextElY;
                    nBottomRegionHeight = (viewPortHeight - (nContextElY + nContextElHeight));
    
                    setVerticalPosition();
                
                }

                yNew = oOverlay.cfg.getProperty("y");

            }
            else {

                if (bCanConstrain) {
    
                    topConstraint = scrollY + nViewportOffset;
                    bottomConstraint = 
                        scrollY + viewPortHeight - nOverlayOffsetHeight - nViewportOffset;
    
                    if (y < topConstraint) {
                        yNew  = topConstraint;
                    } else if (y  > bottomConstraint) {
                        yNew  = bottomConstraint;
                    }
                } else {
                    yNew = nViewportOffset + scrollY;
                }

            }

            return yNew;
        },


        /**
         * Given x, y coordinate values, returns the calculated coordinates required to 
         * position the Overlay if it is to be constrained to the viewport, based on the 
         * current element size, viewport dimensions and scroll values.
         *
         * @param {Number} x The X coordinate value to be constrained
         * @param {Number} y The Y coordinate value to be constrained
         * @return {Array} The constrained x and y coordinates at index 0 and 1 respectively;
         */
        getConstrainedXY: function(x, y) {
            return [this.getConstrainedX(x), this.getConstrainedY(y)];
        },

        /**
        * Centers the container in the viewport.
        * @method center
        */
        center: function () {

            var nViewportOffset = Overlay.VIEWPORT_OFFSET,
                elementWidth = this.element.offsetWidth,
                elementHeight = this.element.offsetHeight,
                viewPortWidth = Dom.getViewportWidth(),
                viewPortHeight = Dom.getViewportHeight(),
                x,
                y;

            if (elementWidth < viewPortWidth) {
                x = (viewPortWidth / 2) - (elementWidth / 2) + Dom.getDocumentScrollLeft();
            } else {
                x = nViewportOffset + Dom.getDocumentScrollLeft();
            }

            if (elementHeight < viewPortHeight) {
                y = (viewPortHeight / 2) - (elementHeight / 2) + Dom.getDocumentScrollTop();
            } else {
                y = nViewportOffset + Dom.getDocumentScrollTop();
            }

            this.cfg.setProperty("xy", [parseInt(x, 10), parseInt(y, 10)]);
            this.cfg.refireEvent("iframe");
        },

        /**
        * Synchronizes the Panel's "xy", "x", and "y" properties with the 
        * Panel's position in the DOM. This is primarily used to update  
        * position information during drag & drop.
        * @method syncPosition
        */
        syncPosition: function () {

            var pos = Dom.getXY(this.element);

            this.cfg.setProperty("x", pos[0], true);
            this.cfg.setProperty("y", pos[1], true);
            this.cfg.setProperty("xy", pos, true);

        },

        /**
        * Event handler fired when the resize monitor element is resized.
        * @method onDomResize
        * @param {DOMEvent} e The resize DOM event
        * @param {Object} obj The scope object
        */
        onDomResize: function (e, obj) {

            var me = this;

            Overlay.superclass.onDomResize.call(this, e, obj);

            setTimeout(function () {
                me.syncPosition();
                me.cfg.refireEvent("iframe");
                me.cfg.refireEvent("context");
            }, 0);
        },

        /**
         * Determines the content box height of the given element (height of the element, without padding or borders) in pixels.
         *
         * @method _getComputedHeight
         * @private
         * @param {HTMLElement} el The element for which the content height needs to be determined
         * @return {Number} The content box height of the given element, or null if it could not be determined.
         */
        _getComputedHeight : (function() {

            if (document.defaultView && document.defaultView.getComputedStyle) {
                return function(el) {
                    var height = null;
                    if (el.ownerDocument && el.ownerDocument.defaultView) {
                        var computed = el.ownerDocument.defaultView.getComputedStyle(el, '');
                        if (computed) {
                            height = parseInt(computed.height, 10);
                        }
                    }
                    return (Lang.isNumber(height)) ? height : null;
                };
            } else {
                return function(el) {
                    var height = null;
                    if (el.style.pixelHeight) {
                        height = el.style.pixelHeight;
                    }
                    return (Lang.isNumber(height)) ? height : null;
                };
            }
        })(),

        /**
         * autofillheight validator. Verifies that the autofill value is either null 
         * or one of the strings : "body", "header" or "footer".
         *
         * @method _validateAutoFillHeight
         * @protected
         * @param {String} val
         * @return true, if valid, false otherwise
         */
        _validateAutoFillHeight : function(val) {
            return (!val) || (Lang.isString(val) && Overlay.STD_MOD_RE.test(val));
        },

        /**
         * The default custom event handler executed when the overlay's height is changed, 
         * if the autofillheight property has been set.
         *
         * @method _autoFillOnHeightChange
         * @protected
         * @param {String} type The event type
         * @param {Array} args The array of arguments passed to event subscribers
         * @param {HTMLElement} el The header, body or footer element which is to be resized to fill
         * out the containers height
         */
        _autoFillOnHeightChange : function(type, args, el) {
            this.fillHeight(el);
        },

        /**
         * Returns the sub-pixel height of the el, using getBoundingClientRect, if available,
         * otherwise returns the offsetHeight
         * @method _getPreciseHeight
         * @private
         * @param {HTMLElement} el
         * @return {Float} The sub-pixel height if supported by the browser, else the rounded height.
         */
        _getPreciseHeight : function(el) {
            var height = el.offsetHeight;

            if (el.getBoundingClientRect) {
                var rect = el.getBoundingClientRect();
                height = rect.bottom - rect.top;
            }

            return height;
        },

        /**
         * <p>
         * Sets the height on the provided header, body or footer element to 
         * fill out the height of the container. It determines the height of the 
         * containers content box, based on it's configured height value, and 
         * sets the height of the autofillheight element to fill out any 
         * space remaining after the other standard module element heights 
         * have been accounted for.
         * </p>
         * <p><strong>NOTE:</strong> This method is not designed to work if an explicit 
         * height has not been set on the container, since for an "auto" height container, 
         * the heights of the header/body/footer will drive the height of the container.</p>
         *
         * @method fillHeight
         * @param {HTMLElement} el The element which should be resized to fill out the height
         * of the container element.
         */
        fillHeight : function(el) {
            if (el) {
                var container = this.innerElement || this.element,
                    containerEls = [this.header, this.body, this.footer],
                    containerEl,
                    total = 0,
                    filled = 0,
                    remaining = 0,
                    validEl = false;

                for (var i = 0, l = containerEls.length; i < l; i++) {
                    containerEl = containerEls[i];
                    if (containerEl) {
                        if (el !== containerEl) {
                            filled += this._getPreciseHeight(containerEl);
                        } else {
                            validEl = true;
                        }
                    }
                }

                if (validEl) {

                    if (UA.ie || UA.opera) {
                        // Need to set height to 0, to allow height to be reduced
                        Dom.setStyle(el, 'height', 0 + 'px');
                    }

                    total = this._getComputedHeight(container);

                    // Fallback, if we can't get computed value for content height
                    if (total === null) {
                        Dom.addClass(container, "yui-override-padding");
                        total = container.clientHeight; // Content, No Border, 0 Padding (set by yui-override-padding)
                        Dom.removeClass(container, "yui-override-padding");
                    }
    
                    remaining = total - filled;
    
                    Dom.setStyle(el, "height", remaining + "px");
    
                    // Re-adjust height if required, to account for el padding and border
                    if (el.offsetHeight != remaining) {
                        remaining = remaining - (el.offsetHeight - remaining);
                    }
                    Dom.setStyle(el, "height", remaining + "px");
                }
            }
        },

        /**
        * Places the Overlay on top of all other instances of 
        * YAHOO.widget.Overlay.
        * @method bringToTop
        */
        bringToTop: function () {

            var aOverlays = [],
                oElement = this.element;

            function compareZIndexDesc(p_oOverlay1, p_oOverlay2) {

                var sZIndex1 = Dom.getStyle(p_oOverlay1, "zIndex"),
                    sZIndex2 = Dom.getStyle(p_oOverlay2, "zIndex"),

                    nZIndex1 = (!sZIndex1 || isNaN(sZIndex1)) ? 0 : parseInt(sZIndex1, 10),
                    nZIndex2 = (!sZIndex2 || isNaN(sZIndex2)) ? 0 : parseInt(sZIndex2, 10);

                if (nZIndex1 > nZIndex2) {
                    return -1;
                } else if (nZIndex1 < nZIndex2) {
                    return 1;
                } else {
                    return 0;
                }
            }

            function isOverlayElement(p_oElement) {

                var isOverlay = Dom.hasClass(p_oElement, Overlay.CSS_OVERLAY),
                    Panel = YAHOO.widget.Panel;

                if (isOverlay && !Dom.isAncestor(oElement, p_oElement)) {
                    if (Panel && Dom.hasClass(p_oElement, Panel.CSS_PANEL)) {
                        aOverlays[aOverlays.length] = p_oElement.parentNode;
                    } else {
                        aOverlays[aOverlays.length] = p_oElement;
                    }
                }
            }

            Dom.getElementsBy(isOverlayElement, "DIV", document.body);

            aOverlays.sort(compareZIndexDesc);

            var oTopOverlay = aOverlays[0],
                nTopZIndex;

            if (oTopOverlay) {
                nTopZIndex = Dom.getStyle(oTopOverlay, "zIndex");

                if (!isNaN(nTopZIndex)) {
                    var bRequiresBump = false;

                    if (oTopOverlay != oElement) {
                        bRequiresBump = true;
                    } else if (aOverlays.length > 1) {
                        var nNextZIndex = Dom.getStyle(aOverlays[1], "zIndex");
                        // Don't rely on DOM order to stack if 2 overlays are at the same zindex.
                        if (!isNaN(nNextZIndex) && (nTopZIndex == nNextZIndex)) {
                            bRequiresBump = true;
                        }
                    }
                    if (bRequiresBump) {
                        this.cfg.setProperty("zindex", (parseInt(nTopZIndex, 10) + 2));
                    }
                }
            }
        },

        /**
        * Removes the Overlay element from the DOM and sets all child 
        * elements to null.
        * @method destroy
        */
        destroy: function () {

            if (this.iframe) {
                this.iframe.parentNode.removeChild(this.iframe);
            }

            this.iframe = null;

            Overlay.windowResizeEvent.unsubscribe(
                this.doCenterOnDOMEvent, this);
    
            Overlay.windowScrollEvent.unsubscribe(
                this.doCenterOnDOMEvent, this);

            Module.textResizeEvent.unsubscribe(this._autoFillOnHeightChange);

            Overlay.superclass.destroy.call(this);
        },

        /**
        * Returns a String representation of the object.
        * @method toString
        * @return {String} The string representation of the Overlay.
        */
        toString: function () {
            return "Overlay " + this.id;
        }

    });
}());

(function () {

    /**
    * OverlayManager is used for maintaining the focus status of 
    * multiple Overlays.
    * @namespace YAHOO.widget
    * @namespace YAHOO.widget
    * @class OverlayManager
    * @constructor
    * @param {Array} overlays Optional. A collection of Overlays to register 
    * with the manager.
    * @param {Object} userConfig  The object literal representing the user 
    * configuration of the OverlayManager
    */
    YAHOO.widget.OverlayManager = function (userConfig) {
        this.init(userConfig);
    };

    var Overlay = YAHOO.widget.Overlay,
        Event = YAHOO.util.Event,
        Dom = YAHOO.util.Dom,
        Config = YAHOO.util.Config,
        CustomEvent = YAHOO.util.CustomEvent,
        OverlayManager = YAHOO.widget.OverlayManager;

    /**
    * The CSS class representing a focused Overlay
    * @property OverlayManager.CSS_FOCUSED
    * @static
    * @final
    * @type String
    */
    OverlayManager.CSS_FOCUSED = "focused";

    OverlayManager.prototype = {

        /**
        * The class's constructor function
        * @property contructor
        * @type Function
        */
        constructor: OverlayManager,

        /**
        * The array of Overlays that are currently registered
        * @property overlays
        * @type YAHOO.widget.Overlay[]
        */
        overlays: null,

        /**
        * Initializes the default configuration of the OverlayManager
        * @method initDefaultConfig
        */
        initDefaultConfig: function () {
            /**
            * The collection of registered Overlays in use by 
            * the OverlayManager
            * @config overlays
            * @type YAHOO.widget.Overlay[]
            * @default null
            */
            this.cfg.addProperty("overlays", { suppressEvent: true } );

            /**
            * The default DOM event that should be used to focus an Overlay
            * @config focusevent
            * @type String
            * @default "mousedown"
            */
            this.cfg.addProperty("focusevent", { value: "mousedown" } );
        },

        /**
        * Initializes the OverlayManager
        * @method init
        * @param {Overlay[]} overlays Optional. A collection of Overlays to 
        * register with the manager.
        * @param {Object} userConfig  The object literal representing the user 
        * configuration of the OverlayManager
        */
        init: function (userConfig) {

            /**
            * The OverlayManager's Config object used for monitoring 
            * configuration properties.
            * @property cfg
            * @type Config
            */
            this.cfg = new Config(this);

            this.initDefaultConfig();

            if (userConfig) {
                this.cfg.applyConfig(userConfig, true);
            }
            this.cfg.fireQueue();

            /**
            * The currently activated Overlay
            * @property activeOverlay
            * @private
            * @type YAHOO.widget.Overlay
            */
            var activeOverlay = null;

            /**
            * Returns the currently focused Overlay
            * @method getActive
            * @return {Overlay} The currently focused Overlay
            */
            this.getActive = function () {
                return activeOverlay;
            };

            /**
            * Focuses the specified Overlay
            * @method focus
            * @param {Overlay} overlay The Overlay to focus
            * @param {String} overlay The id of the Overlay to focus
            */
            this.focus = function (overlay) {
                var o = this.find(overlay);
                if (o) {
                    o.focus();
                }
            };

            /**
            * Removes the specified Overlay from the manager
            * @method remove
            * @param {Overlay} overlay The Overlay to remove
            * @param {String} overlay The id of the Overlay to remove
            */
            this.remove = function (overlay) {

                var o = this.find(overlay), 
                        originalZ;

                if (o) {
                    if (activeOverlay == o) {
                        activeOverlay = null;
                    }

                    var bDestroyed = (o.element === null && o.cfg === null) ? true : false;

                    if (!bDestroyed) {
                        // Set it's zindex so that it's sorted to the end.
                        originalZ = Dom.getStyle(o.element, "zIndex");
                        o.cfg.setProperty("zIndex", -1000, true);
                    }

                    this.overlays.sort(this.compareZIndexDesc);
                    this.overlays = this.overlays.slice(0, (this.overlays.length - 1));

                    o.hideEvent.unsubscribe(o.blur);
                    o.destroyEvent.unsubscribe(this._onOverlayDestroy, o);
                    o.focusEvent.unsubscribe(this._onOverlayFocusHandler, o);
                    o.blurEvent.unsubscribe(this._onOverlayBlurHandler, o);

                    if (!bDestroyed) {
                        Event.removeListener(o.element, this.cfg.getProperty("focusevent"), this._onOverlayElementFocus);
                        o.cfg.setProperty("zIndex", originalZ, true);
                        o.cfg.setProperty("manager", null);
                    }

                    /* _managed Flag for custom or existing. Don't want to remove existing */
                    if (o.focusEvent._managed) { o.focusEvent = null; }
                    if (o.blurEvent._managed) { o.blurEvent = null; }

                    if (o.focus._managed) { o.focus = null; }
                    if (o.blur._managed) { o.blur = null; }
                }
            };

            /**
            * Removes focus from all registered Overlays in the manager
            * @method blurAll
            */
            this.blurAll = function () {

                var nOverlays = this.overlays.length,
                    i;

                if (nOverlays > 0) {
                    i = nOverlays - 1;
                    do {
                        this.overlays[i].blur();
                    }
                    while(i--);
                }
            };

            /**
             * Updates the state of the OverlayManager and overlay, as a result of the overlay
             * being blurred.
             * 
             * @method _manageBlur
             * @param {Overlay} overlay The overlay instance which got blurred.
             * @protected
             */
            this._manageBlur = function (overlay) {
                var changed = false;
                if (activeOverlay == overlay) {
                    Dom.removeClass(activeOverlay.element, OverlayManager.CSS_FOCUSED);
                    activeOverlay = null;
                    changed = true;
                }
                return changed;
            };

            /**
             * Updates the state of the OverlayManager and overlay, as a result of the overlay 
             * receiving focus.
             *
             * @method _manageFocus
             * @param {Overlay} overlay The overlay instance which got focus.
             * @protected
             */
            this._manageFocus = function(overlay) {
                var changed = false;
                if (activeOverlay != overlay) {
                    if (activeOverlay) {
                        activeOverlay.blur();
                    }
                    activeOverlay = overlay;
                    this.bringToTop(activeOverlay);
                    Dom.addClass(activeOverlay.element, OverlayManager.CSS_FOCUSED);
                    changed = true;
                }
                return changed;
            };

            var overlays = this.cfg.getProperty("overlays");

            if (! this.overlays) {
                this.overlays = [];
            }

            if (overlays) {
                this.register(overlays);
                this.overlays.sort(this.compareZIndexDesc);
            }
        },

        /**
        * @method _onOverlayElementFocus
        * @description Event handler for the DOM event that is used to focus 
        * the Overlay instance as specified by the "focusevent" 
        * configuration property.
        * @private
        * @param {Event} p_oEvent Object representing the DOM event 
        * object passed back by the event utility (Event).
        */
        _onOverlayElementFocus: function (p_oEvent) {

            var oTarget = Event.getTarget(p_oEvent),
                oClose = this.close;

            if (oClose && (oTarget == oClose || Dom.isAncestor(oClose, oTarget))) {
                this.blur();
            } else {
                this.focus();
            }
        },

        /**
        * @method _onOverlayDestroy
        * @description "destroy" event handler for the Overlay.
        * @private
        * @param {String} p_sType String representing the name of the event  
        * that was fired.
        * @param {Array} p_aArgs Array of arguments sent when the event 
        * was fired.
        * @param {Overlay} p_oOverlay Object representing the overlay that 
        * fired the event.
        */
        _onOverlayDestroy: function (p_sType, p_aArgs, p_oOverlay) {
            this.remove(p_oOverlay);
        },

        /**
        * @method _onOverlayFocusHandler
        *
        * focusEvent Handler, used to delegate to _manageFocus with the 
        * correct arguments.
        *
        * @private
        * @param {String} p_sType String representing the name of the event  
        * that was fired.
        * @param {Array} p_aArgs Array of arguments sent when the event 
        * was fired.
        * @param {Overlay} p_oOverlay Object representing the overlay that 
        * fired the event.
        */
        _onOverlayFocusHandler: function(p_sType, p_aArgs, p_oOverlay) {
            this._manageFocus(p_oOverlay);
        },

        /**
        * @method _onOverlayBlurHandler
        *
        * blurEvent Handler, used to delegate to _manageBlur with the 
        * correct arguments.
        *
        * @private
        * @param {String} p_sType String representing the name of the event  
        * that was fired.
        * @param {Array} p_aArgs Array of arguments sent when the event 
        * was fired.
        * @param {Overlay} p_oOverlay Object representing the overlay that 
        * fired the event.
        */
        _onOverlayBlurHandler: function(p_sType, p_aArgs, p_oOverlay) {
            this._manageBlur(p_oOverlay);
        },

        /**
         * Subscribes to the Overlay based instance focusEvent, to allow the OverlayManager to
         * monitor focus state.
         * 
         * If the instance already has a focusEvent (e.g. Menu), OverlayManager will subscribe 
         * to the existing focusEvent, however if a focusEvent or focus method does not exist
         * on the instance, the _bindFocus method will add them, and the focus method will 
         * update the OverlayManager's state directly.
         * 
         * @method _bindFocus
         * @param {Overlay} overlay The overlay for which focus needs to be managed
         * @protected
         */
        _bindFocus : function(overlay) {
            var mgr = this;

            if (!overlay.focusEvent) {
                overlay.focusEvent = overlay.createEvent("focus");
                overlay.focusEvent.signature = CustomEvent.LIST;
                overlay.focusEvent._managed = true;
            } else {
                overlay.focusEvent.subscribe(mgr._onOverlayFocusHandler, overlay, mgr);
            }

            if (!overlay.focus) {
                Event.on(overlay.element, mgr.cfg.getProperty("focusevent"), mgr._onOverlayElementFocus, null, overlay);
                overlay.focus = function () {
                    if (mgr._manageFocus(this)) {
                        // For Panel/Dialog
                        if (this.cfg.getProperty("visible") && this.focusFirst) {
                            this.focusFirst();
                        }
                        this.focusEvent.fire();
                    }
                };
                overlay.focus._managed = true;
            }
        },

        /**
         * Subscribes to the Overlay based instance's blurEvent to allow the OverlayManager to
         * monitor blur state.
         *
         * If the instance already has a blurEvent (e.g. Menu), OverlayManager will subscribe 
         * to the existing blurEvent, however if a blurEvent or blur method does not exist
         * on the instance, the _bindBlur method will add them, and the blur method 
         * update the OverlayManager's state directly.
         *
         * @method _bindBlur
         * @param {Overlay} overlay The overlay for which blur needs to be managed
         * @protected
         */
        _bindBlur : function(overlay) {
            var mgr = this;

            if (!overlay.blurEvent) {
                overlay.blurEvent = overlay.createEvent("blur");
                overlay.blurEvent.signature = CustomEvent.LIST;
                overlay.focusEvent._managed = true;
            } else {
                overlay.blurEvent.subscribe(mgr._onOverlayBlurHandler, overlay, mgr);
            }

            if (!overlay.blur) {
                overlay.blur = function () {
                    if (mgr._manageBlur(this)) {
                        this.blurEvent.fire();
                    }
                };
                overlay.blur._managed = true;
            }

            overlay.hideEvent.subscribe(overlay.blur);
        },

        /**
         * Subscribes to the Overlay based instance's destroyEvent, to allow the Overlay
         * to be removed for the OverlayManager when destroyed.
         * 
         * @method _bindDestroy
         * @param {Overlay} overlay The overlay instance being managed
         * @protected
         */
        _bindDestroy : function(overlay) {
            var mgr = this;
            overlay.destroyEvent.subscribe(mgr._onOverlayDestroy, overlay, mgr);
        },

        /**
         * Ensures the zIndex configuration property on the managed overlay based instance
         * is set to the computed zIndex value from the DOM (with "auto" translating to 0).
         *
         * @method _syncZIndex
         * @param {Overlay} overlay The overlay instance being managed
         * @protected
         */
        _syncZIndex : function(overlay) {
            var zIndex = Dom.getStyle(overlay.element, "zIndex");
            if (!isNaN(zIndex)) {
                overlay.cfg.setProperty("zIndex", parseInt(zIndex, 10));
            } else {
                overlay.cfg.setProperty("zIndex", 0);
            }
        },

        /**
        * Registers an Overlay or an array of Overlays with the manager. Upon 
        * registration, the Overlay receives functions for focus and blur, 
        * along with CustomEvents for each.
        *
        * @method register
        * @param {Overlay} overlay  An Overlay to register with the manager.
        * @param {Overlay[]} overlay  An array of Overlays to register with 
        * the manager.
        * @return {boolean} true if any Overlays are registered.
        */
        register: function (overlay) {

            var zIndex,
                registered = false,
                i,
                n;

            if (overlay instanceof Overlay) {

                overlay.cfg.addProperty("manager", { value: this } );

                this._bindFocus(overlay);
                this._bindBlur(overlay);
                this._bindDestroy(overlay);
                this._syncZIndex(overlay);

                this.overlays.push(overlay);
                this.bringToTop(overlay);

                registered = true;

            } else if (overlay instanceof Array) {

                for (i = 0, n = overlay.length; i < n; i++) {
                    registered = this.register(overlay[i]) || registered;
                }

            }

            return registered;
        },

        /**
        * Places the specified Overlay instance on top of all other 
        * Overlay instances.
        * @method bringToTop
        * @param {YAHOO.widget.Overlay} p_oOverlay Object representing an 
        * Overlay instance.
        * @param {String} p_oOverlay String representing the id of an 
        * Overlay instance.
        */        
        bringToTop: function (p_oOverlay) {

            var oOverlay = this.find(p_oOverlay),
                nTopZIndex,
                oTopOverlay,
                aOverlays;

            if (oOverlay) {

                aOverlays = this.overlays;
                aOverlays.sort(this.compareZIndexDesc);

                oTopOverlay = aOverlays[0];

                if (oTopOverlay) {
                    nTopZIndex = Dom.getStyle(oTopOverlay.element, "zIndex");

                    if (!isNaN(nTopZIndex)) {

                        var bRequiresBump = false;

                        if (oTopOverlay !== oOverlay) {
                            bRequiresBump = true;
                        } else if (aOverlays.length > 1) {
                            var nNextZIndex = Dom.getStyle(aOverlays[1].element, "zIndex");
                            // Don't rely on DOM order to stack if 2 overlays are at the same zindex.
                            if (!isNaN(nNextZIndex) && (nTopZIndex == nNextZIndex)) {
                                bRequiresBump = true;
                            }
                        }

                        if (bRequiresBump) {
                            oOverlay.cfg.setProperty("zindex", (parseInt(nTopZIndex, 10) + 2));
                        }
                    }
                    aOverlays.sort(this.compareZIndexDesc);
                }
            }
        },

        /**
        * Attempts to locate an Overlay by instance or ID.
        * @method find
        * @param {Overlay} overlay  An Overlay to locate within the manager
        * @param {String} overlay  An Overlay id to locate within the manager
        * @return {Overlay} The requested Overlay, if found, or null if it 
        * cannot be located.
        */
        find: function (overlay) {

            var isInstance = overlay instanceof Overlay,
                overlays = this.overlays,
                n = overlays.length,
                found = null,
                o,
                i;

            if (isInstance || typeof overlay == "string") {
                for (i = n-1; i >= 0; i--) {
                    o = overlays[i];
                    if ((isInstance && (o === overlay)) || (o.id == overlay)) {
                        found = o;
                        break;
                    }
                }
            }

            return found;
        },

        /**
        * Used for sorting the manager's Overlays by z-index.
        * @method compareZIndexDesc
        * @private
        * @return {Number} 0, 1, or -1, depending on where the Overlay should 
        * fall in the stacking order.
        */
        compareZIndexDesc: function (o1, o2) {

            var zIndex1 = (o1.cfg) ? o1.cfg.getProperty("zIndex") : null, // Sort invalid (destroyed)
                zIndex2 = (o2.cfg) ? o2.cfg.getProperty("zIndex") : null; // objects at bottom.

            if (zIndex1 === null && zIndex2 === null) {
                return 0;
            } else if (zIndex1 === null){
                return 1;
            } else if (zIndex2 === null) {
                return -1;
            } else if (zIndex1 > zIndex2) {
                return -1;
            } else if (zIndex1 < zIndex2) {
                return 1;
            } else {
                return 0;
            }
        },

        /**
        * Shows all Overlays in the manager.
        * @method showAll
        */
        showAll: function () {
            var overlays = this.overlays,
                n = overlays.length,
                i;

            for (i = n - 1; i >= 0; i--) {
                overlays[i].show();
            }
        },

        /**
        * Hides all Overlays in the manager.
        * @method hideAll
        */
        hideAll: function () {
            var overlays = this.overlays,
                n = overlays.length,
                i;

            for (i = n - 1; i >= 0; i--) {
                overlays[i].hide();
            }
        },

        /**
        * Returns a string representation of the object.
        * @method toString
        * @return {String} The string representation of the OverlayManager
        */
        toString: function () {
            return "OverlayManager";
        }
    };
}());

(function () {

    /**
    * Tooltip is an implementation of Overlay that behaves like an OS tooltip, 
    * displaying when the user mouses over a particular element, and 
    * disappearing on mouse out.
    * @namespace YAHOO.widget
    * @class Tooltip
    * @extends YAHOO.widget.Overlay
    * @constructor
    * @param {String} el The element ID representing the Tooltip <em>OR</em>
    * @param {HTMLElement} el The element representing the Tooltip
    * @param {Object} userConfig The configuration object literal containing 
    * the configuration that should be set for this Overlay. See configuration 
    * documentation for more details.
    */
    YAHOO.widget.Tooltip = function (el, userConfig) {
        YAHOO.widget.Tooltip.superclass.constructor.call(this, el, userConfig);
    };

    var Lang = YAHOO.lang,
        Event = YAHOO.util.Event,
        CustomEvent = YAHOO.util.CustomEvent,
        Dom = YAHOO.util.Dom,
        Tooltip = YAHOO.widget.Tooltip,

        m_oShadowTemplate,

        /**
        * Constant representing the Tooltip's configuration properties
        * @property DEFAULT_CONFIG
        * @private
        * @final
        * @type Object
        */
        DEFAULT_CONFIG = {

            "PREVENT_OVERLAP": { 
                key: "preventoverlap", 
                value: true, 
                validator: Lang.isBoolean, 
                supercedes: ["x", "y", "xy"] 
            },

            "SHOW_DELAY": { 
                key: "showdelay", 
                value: 200, 
                validator: Lang.isNumber 
            }, 

            "AUTO_DISMISS_DELAY": { 
                key: "autodismissdelay", 
                value: 5000, 
                validator: Lang.isNumber 
            }, 

            "HIDE_DELAY": { 
                key: "hidedelay", 
                value: 250, 
                validator: Lang.isNumber 
            }, 

            "TEXT": { 
                key: "text", 
                suppressEvent: true 
            }, 

            "CONTAINER": { 
                key: "container"
            },

            "DISABLED": {
                key: "disabled",
                value: false,
                suppressEvent: true
            }
        },

        /**
        * Constant representing the name of the Tooltip's events
        * @property EVENT_TYPES
        * @private
        * @final
        * @type Object
        */
        EVENT_TYPES = {
            "CONTEXT_MOUSE_OVER": "contextMouseOver",
            "CONTEXT_MOUSE_OUT": "contextMouseOut",
            "CONTEXT_TRIGGER": "contextTrigger"
        };

    /**
    * Constant representing the Tooltip CSS class
    * @property YAHOO.widget.Tooltip.CSS_TOOLTIP
    * @static
    * @final
    * @type String
    */
    Tooltip.CSS_TOOLTIP = "yui-tt";

    /* 
        "hide" event handler that sets a Tooltip instance's "width"
        configuration property back to its original value before 
        "setWidthToOffsetWidth" was called.
    */
    function restoreOriginalWidth(p_sType, p_aArgs, p_oObject) {

        var sOriginalWidth = p_oObject[0],
            sNewWidth = p_oObject[1],
            oConfig = this.cfg,
            sCurrentWidth = oConfig.getProperty("width");

        if (sCurrentWidth == sNewWidth) {
            oConfig.setProperty("width", sOriginalWidth);
        }
    }

    /* 
        "beforeShow" event handler that sets a Tooltip instance's "width"
        configuration property to the value of its root HTML 
        elements's offsetWidth
    */

    function setWidthToOffsetWidth(p_sType, p_aArgs) {

        var oBody = document.body,
            oConfig = this.cfg,
            sOriginalWidth = oConfig.getProperty("width"),
            sNewWidth,
            oClone;

        if ((!sOriginalWidth || sOriginalWidth == "auto") && 
            (oConfig.getProperty("container") != oBody || 
            oConfig.getProperty("x") >= Dom.getViewportWidth() || 
            oConfig.getProperty("y") >= Dom.getViewportHeight())) {

            oClone = this.element.cloneNode(true);
            oClone.style.visibility = "hidden";
            oClone.style.top = "0px";
            oClone.style.left = "0px";

            oBody.appendChild(oClone);

            sNewWidth = (oClone.offsetWidth + "px");

            oBody.removeChild(oClone);
            oClone = null;

            oConfig.setProperty("width", sNewWidth);
            oConfig.refireEvent("xy");

            this.subscribe("hide", restoreOriginalWidth, [(sOriginalWidth || ""), sNewWidth]);
        }
    }

    // "onDOMReady" that renders the ToolTip

    function onDOMReady(p_sType, p_aArgs, p_oObject) {
        this.render(p_oObject);
    }

    //  "init" event handler that automatically renders the Tooltip

    function onInit() {
        Event.onDOMReady(onDOMReady, this.cfg.getProperty("container"), this);
    }

    YAHOO.extend(Tooltip, YAHOO.widget.Overlay, { 

        /**
        * The Tooltip initialization method. This method is automatically 
        * called by the constructor. A Tooltip is automatically rendered by 
        * the init method, and it also is set to be invisible by default, 
        * and constrained to viewport by default as well.
        * @method init
        * @param {String} el The element ID representing the Tooltip <em>OR</em>
        * @param {HTMLElement} el The element representing the Tooltip
        * @param {Object} userConfig The configuration object literal 
        * containing the configuration that should be set for this Tooltip. 
        * See configuration documentation for more details.
        */
        init: function (el, userConfig) {


            Tooltip.superclass.init.call(this, el);

            this.beforeInitEvent.fire(Tooltip);

            Dom.addClass(this.element, Tooltip.CSS_TOOLTIP);

            if (userConfig) {
                this.cfg.applyConfig(userConfig, true);
            }

            this.cfg.queueProperty("visible", false);
            this.cfg.queueProperty("constraintoviewport", true);

            this.setBody("");

            this.subscribe("beforeShow", setWidthToOffsetWidth);
            this.subscribe("init", onInit);
            this.subscribe("render", this.onRender);

            this.initEvent.fire(Tooltip);
        },

        /**
        * Initializes the custom events for Tooltip
        * @method initEvents
        */
        initEvents: function () {

            Tooltip.superclass.initEvents.call(this);
            var SIGNATURE = CustomEvent.LIST;

            /**
            * CustomEvent fired when user mouses over a context element. Returning false from
            * a subscriber to this event will prevent the tooltip from being displayed for
            * the current context element.
            * 
            * @event contextMouseOverEvent
            * @param {HTMLElement} context The context element which the user just moused over
            * @param {DOMEvent} e The DOM event object, associated with the mouse over
            */
            this.contextMouseOverEvent = this.createEvent(EVENT_TYPES.CONTEXT_MOUSE_OVER);
            this.contextMouseOverEvent.signature = SIGNATURE;

            /**
            * CustomEvent fired when the user mouses out of a context element.
            * 
            * @event contextMouseOutEvent
            * @param {HTMLElement} context The context element which the user just moused out of
            * @param {DOMEvent} e The DOM event object, associated with the mouse out
            */
            this.contextMouseOutEvent = this.createEvent(EVENT_TYPES.CONTEXT_MOUSE_OUT);
            this.contextMouseOutEvent.signature = SIGNATURE;

            /**
            * CustomEvent fired just before the tooltip is displayed for the current context.
            * <p>
            *  You can subscribe to this event if you need to set up the text for the 
            *  tooltip based on the context element for which it is about to be displayed.
            * </p>
            * <p>This event differs from the beforeShow event in following respects:</p>
            * <ol>
            *   <li>
            *    When moving from one context element to another, if the tooltip is not
            *    hidden (the <code>hidedelay</code> is not reached), the beforeShow and Show events will not
            *    be fired when the tooltip is displayed for the new context since it is already visible.
            *    However the contextTrigger event is always fired before displaying the tooltip for
            *    a new context.
            *   </li>
            *   <li>
            *    The trigger event provides access to the context element, allowing you to 
            *    set the text of the tooltip based on context element for which the tooltip is
            *    triggered.
            *   </li>
            * </ol>
            * <p>
            *  It is not possible to prevent the tooltip from being displayed
            *  using this event. You can use the contextMouseOverEvent if you need to prevent
            *  the tooltip from being displayed.
            * </p>
            * @event contextTriggerEvent
            * @param {HTMLElement} context The context element for which the tooltip is triggered
            */
            this.contextTriggerEvent = this.createEvent(EVENT_TYPES.CONTEXT_TRIGGER);
            this.contextTriggerEvent.signature = SIGNATURE;
        },

        /**
        * Initializes the class's configurable properties which can be 
        * changed using the Overlay's Config object (cfg).
        * @method initDefaultConfig
        */
        initDefaultConfig: function () {

            Tooltip.superclass.initDefaultConfig.call(this);

            /**
            * Specifies whether the Tooltip should be kept from overlapping 
            * its context element.
            * @config preventoverlap
            * @type Boolean
            * @default true
            */
            this.cfg.addProperty(DEFAULT_CONFIG.PREVENT_OVERLAP.key, {
                value: DEFAULT_CONFIG.PREVENT_OVERLAP.value, 
                validator: DEFAULT_CONFIG.PREVENT_OVERLAP.validator, 
                supercedes: DEFAULT_CONFIG.PREVENT_OVERLAP.supercedes
            });

            /**
            * The number of milliseconds to wait before showing a Tooltip 
            * on mouseover.
            * @config showdelay
            * @type Number
            * @default 200
            */
            this.cfg.addProperty(DEFAULT_CONFIG.SHOW_DELAY.key, {
                handler: this.configShowDelay,
                value: 200, 
                validator: DEFAULT_CONFIG.SHOW_DELAY.validator
            });

            /**
            * The number of milliseconds to wait before automatically 
            * dismissing a Tooltip after the mouse has been resting on the 
            * context element.
            * @config autodismissdelay
            * @type Number
            * @default 5000
            */
            this.cfg.addProperty(DEFAULT_CONFIG.AUTO_DISMISS_DELAY.key, {
                handler: this.configAutoDismissDelay,
                value: DEFAULT_CONFIG.AUTO_DISMISS_DELAY.value,
                validator: DEFAULT_CONFIG.AUTO_DISMISS_DELAY.validator
            });

            /**
            * The number of milliseconds to wait before hiding a Tooltip 
            * after mouseout.
            * @config hidedelay
            * @type Number
            * @default 250
            */
            this.cfg.addProperty(DEFAULT_CONFIG.HIDE_DELAY.key, {
                handler: this.configHideDelay,
                value: DEFAULT_CONFIG.HIDE_DELAY.value, 
                validator: DEFAULT_CONFIG.HIDE_DELAY.validator
            });

            /**
            * Specifies the Tooltip's text. 
            * @config text
            * @type String
            * @default null
            */
            this.cfg.addProperty(DEFAULT_CONFIG.TEXT.key, {
                handler: this.configText,
                suppressEvent: DEFAULT_CONFIG.TEXT.suppressEvent
            });

            /**
            * Specifies the container element that the Tooltip's markup 
            * should be rendered into.
            * @config container
            * @type HTMLElement/String
            * @default document.body
            */
            this.cfg.addProperty(DEFAULT_CONFIG.CONTAINER.key, {
                handler: this.configContainer,
                value: document.body
            });

            /**
            * Specifies whether or not the tooltip is disabled. Disabled tooltips
            * will not be displayed. If the tooltip is driven by the title attribute
            * of the context element, the title attribute will still be removed for 
            * disabled tooltips, to prevent default tooltip behavior.
            * 
            * @config disabled
            * @type Boolean
            * @default false
            */
            this.cfg.addProperty(DEFAULT_CONFIG.DISABLED.key, {
                handler: this.configContainer,
                value: DEFAULT_CONFIG.DISABLED.value,
                supressEvent: DEFAULT_CONFIG.DISABLED.suppressEvent
            });

            /**
            * Specifies the element or elements that the Tooltip should be 
            * anchored to on mouseover.
            * @config context
            * @type HTMLElement[]/String[]
            * @default null
            */ 

            /**
            * String representing the width of the Tooltip.  <em>Please note:
            * </em> As of version 2.3 if either no value or a value of "auto" 
            * is specified, and the Toolip's "container" configuration property
            * is set to something other than <code>document.body</code> or 
            * its "context" element resides outside the immediately visible 
            * portion of the document, the width of the Tooltip will be 
            * calculated based on the offsetWidth of its root HTML and set just 
            * before it is made visible.  The original value will be 
            * restored when the Tooltip is hidden. This ensures the Tooltip is 
            * rendered at a usable width.  For more information see 
            * SourceForge bug #1685496 and SourceForge 
            * bug #1735423.
            * @config width
            * @type String
            * @default null
            */
        
        },
        
        // BEGIN BUILT-IN PROPERTY EVENT HANDLERS //
        
        /**
        * The default event handler fired when the "text" property is changed.
        * @method configText
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configText: function (type, args, obj) {
            var text = args[0];
            if (text) {
                this.setBody(text);
            }
        },
        
        /**
        * The default event handler fired when the "container" property 
        * is changed.
        * @method configContainer
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For 
        * configuration handlers, args[0] will equal the newly applied value 
        * for the property.
        * @param {Object} obj The scope object. For configuration handlers,
        * this will usually equal the owner.
        */
        configContainer: function (type, args, obj) {
            var container = args[0];

            if (typeof container == 'string') {
                this.cfg.setProperty("container", document.getElementById(container), true);
            }
        },
        
        /**
        * @method _removeEventListeners
        * @description Removes all of the DOM event handlers from the HTML
        *  element(s) that trigger the display of the tooltip.
        * @protected
        */
        _removeEventListeners: function () {
        
            var aElements = this._context,
                nElements,
                oElement,
                i;

            if (aElements) {
                nElements = aElements.length;
                if (nElements > 0) {
                    i = nElements - 1;
                    do {
                        oElement = aElements[i];
                        Event.removeListener(oElement, "mouseover", this.onContextMouseOver);
                        Event.removeListener(oElement, "mousemove", this.onContextMouseMove);
                        Event.removeListener(oElement, "mouseout", this.onContextMouseOut);
                    }
                    while (i--);
                }
            }
        },
        
        /**
        * The default event handler fired when the "context" property 
        * is changed.
        * @method configContext
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers,
        * this will usually equal the owner.
        */
        configContext: function (type, args, obj) {
        
            var context = args[0],
                aElements,
                nElements,
                oElement,
                i;

            if (context) {

                // Normalize parameter into an array
                if (! (context instanceof Array)) {
                    if (typeof context == "string") {
                        this.cfg.setProperty("context", [document.getElementById(context)], true);
                    } else { // Assuming this is an element
                        this.cfg.setProperty("context", [context], true);
                    }
                    context = this.cfg.getProperty("context");
                }

                // Remove any existing mouseover/mouseout listeners
                this._removeEventListeners();

                // Add mouseover/mouseout listeners to context elements
                this._context = context;

                aElements = this._context;

                if (aElements) {
                    nElements = aElements.length;
                    if (nElements > 0) {
                        i = nElements - 1;
                        do {
                            oElement = aElements[i];
                            Event.on(oElement, "mouseover", this.onContextMouseOver, this);
                            Event.on(oElement, "mousemove", this.onContextMouseMove, this);
                            Event.on(oElement, "mouseout", this.onContextMouseOut, this);
                        }
                        while (i--);
                    }
                }
            }
        },

        // END BUILT-IN PROPERTY EVENT HANDLERS //

        // BEGIN BUILT-IN DOM EVENT HANDLERS //

        /**
        * The default event handler fired when the user moves the mouse while 
        * over the context element.
        * @method onContextMouseMove
        * @param {DOMEvent} e The current DOM event
        * @param {Object} obj The object argument
        */
        onContextMouseMove: function (e, obj) {
            obj.pageX = Event.getPageX(e);
            obj.pageY = Event.getPageY(e);
        },

        /**
        * The default event handler fired when the user mouses over the 
        * context element.
        * @method onContextMouseOver
        * @param {DOMEvent} e The current DOM event
        * @param {Object} obj The object argument
        */
        onContextMouseOver: function (e, obj) {
            var context = this;

            if (context.title) {
                obj._tempTitle = context.title;
                context.title = "";
            }

            // Fire first, to honor disabled set in the listner
            if (obj.fireEvent("contextMouseOver", context, e) !== false 
                    && !obj.cfg.getProperty("disabled")) {

                // Stop the tooltip from being hidden (set on last mouseout)
                if (obj.hideProcId) {
                    clearTimeout(obj.hideProcId);
                    obj.hideProcId = null;
                }

                Event.on(context, "mousemove", obj.onContextMouseMove, obj);

                /**
                * The unique process ID associated with the thread responsible 
                * for showing the Tooltip.
                * @type int
                */
                obj.showProcId = obj.doShow(e, context);
            }
        },

        /**
        * The default event handler fired when the user mouses out of 
        * the context element.
        * @method onContextMouseOut
        * @param {DOMEvent} e The current DOM event
        * @param {Object} obj The object argument
        */
        onContextMouseOut: function (e, obj) {
            var el = this;

            if (obj._tempTitle) {
                el.title = obj._tempTitle;
                obj._tempTitle = null;
            }

            if (obj.showProcId) {
                clearTimeout(obj.showProcId);
                obj.showProcId = null;
            }

            if (obj.hideProcId) {
                clearTimeout(obj.hideProcId);
                obj.hideProcId = null;
            }

            obj.fireEvent("contextMouseOut", el, e);

            obj.hideProcId = setTimeout(function () {
                obj.hide();
            }, obj.cfg.getProperty("hidedelay"));
        },

        // END BUILT-IN DOM EVENT HANDLERS //

        /**
        * Processes the showing of the Tooltip by setting the timeout delay 
        * and offset of the Tooltip.
        * @method doShow
        * @param {DOMEvent} e The current DOM event
        * @param {HTMLElement} context The current context element
        * @return {Number} The process ID of the timeout function associated 
        * with doShow
        */
        doShow: function (e, context) {

            var yOffset = 25,
                me = this;

            if (YAHOO.env.ua.opera && context.tagName && 
                context.tagName.toUpperCase() == "A") {
                yOffset += 12;
            }

            return setTimeout(function () {

                var txt = me.cfg.getProperty("text");

                // title does not over-ride text
                if (me._tempTitle && (txt === "" || YAHOO.lang.isUndefined(txt) || YAHOO.lang.isNull(txt))) {
                    me.setBody(me._tempTitle);
                } else {
                    me.cfg.refireEvent("text");
                }

                me.moveTo(me.pageX, me.pageY + yOffset);

                if (me.cfg.getProperty("preventoverlap")) {
                    me.preventOverlap(me.pageX, me.pageY);
                }

                Event.removeListener(context, "mousemove", me.onContextMouseMove);

                me.contextTriggerEvent.fire(context);

                me.show();

                me.hideProcId = me.doHide();

            }, this.cfg.getProperty("showdelay"));
        },

        /**
        * Sets the timeout for the auto-dismiss delay, which by default is 5 
        * seconds, meaning that a tooltip will automatically dismiss itself 
        * after 5 seconds of being displayed.
        * @method doHide
        */
        doHide: function () {

            var me = this;


            return setTimeout(function () {

                me.hide();

            }, this.cfg.getProperty("autodismissdelay"));

        },
        
        /**
        * Fired when the Tooltip is moved, this event handler is used to 
        * prevent the Tooltip from overlapping with its context element.
        * @method preventOverlay
        * @param {Number} pageX The x coordinate position of the mouse pointer
        * @param {Number} pageY The y coordinate position of the mouse pointer
        */
        preventOverlap: function (pageX, pageY) {
        
            var height = this.element.offsetHeight,
                mousePoint = new YAHOO.util.Point(pageX, pageY),
                elementRegion = Dom.getRegion(this.element);
        
            elementRegion.top -= 5;
            elementRegion.left -= 5;
            elementRegion.right += 5;
            elementRegion.bottom += 5;
        
        
            if (elementRegion.contains(mousePoint)) {
                this.cfg.setProperty("y", (pageY - height - 5));
            }
        },


        /**
        * @method onRender
        * @description "render" event handler for the Tooltip.
        * @param {String} p_sType String representing the name of the event  
        * that was fired.
        * @param {Array} p_aArgs Array of arguments sent when the event 
        * was fired.
        */
        onRender: function (p_sType, p_aArgs) {
    
            function sizeShadow() {
    
                var oElement = this.element,
                    oShadow = this._shadow;
            
                if (oShadow) {
                    oShadow.style.width = (oElement.offsetWidth + 6) + "px";
                    oShadow.style.height = (oElement.offsetHeight + 1) + "px"; 
                }
            
            }

            function addShadowVisibleClass() {
                Dom.addClass(this._shadow, "yui-tt-shadow-visible");
            }
            

            function removeShadowVisibleClass() {
                Dom.removeClass(this._shadow, "yui-tt-shadow-visible");
            }

            function createShadow() {
    
                var oShadow = this._shadow,
                    oElement,
                    Module,
                    nIE,
                    me;
    
                if (!oShadow) {
    
                    oElement = this.element;
                    Module = YAHOO.widget.Module;
                    nIE = YAHOO.env.ua.ie;
                    me = this;

                    if (!m_oShadowTemplate) {
                        m_oShadowTemplate = document.createElement("div");
                        m_oShadowTemplate.className = "yui-tt-shadow";
                    }

                    oShadow = m_oShadowTemplate.cloneNode(false);

                    oElement.appendChild(oShadow);

                    this._shadow = oShadow;

                    addShadowVisibleClass.call(this);

                    this.subscribe("beforeShow", addShadowVisibleClass);
                    this.subscribe("beforeHide", removeShadowVisibleClass);

                    if (nIE == 6 || (nIE == 7 && document.compatMode == "BackCompat")) {
                        window.setTimeout(function () { 
                            sizeShadow.call(me); 
                        }, 0);
    
                        this.cfg.subscribeToConfigEvent("width", sizeShadow);
                        this.cfg.subscribeToConfigEvent("height", sizeShadow);
                        this.subscribe("changeContent", sizeShadow);

                        Module.textResizeEvent.subscribe(sizeShadow, this, true);
                        this.subscribe("destroy", function () {
                            Module.textResizeEvent.unsubscribe(sizeShadow, this);
                        });
                    }
                }
            }

            function onBeforeShow() {
                createShadow.call(this);
                this.unsubscribe("beforeShow", onBeforeShow);
            }

            if (this.cfg.getProperty("visible")) {
                createShadow.call(this);
            } else {
                this.subscribe("beforeShow", onBeforeShow);
            }
        
        },
        
        /**
        * Removes the Tooltip element from the DOM and sets all child 
        * elements to null.
        * @method destroy
        */
        destroy: function () {
        
            // Remove any existing mouseover/mouseout listeners
            this._removeEventListeners();

            Tooltip.superclass.destroy.call(this);  
        
        },
        
        /**
        * Returns a string representation of the object.
        * @method toString
        * @return {String} The string representation of the Tooltip
        */
        toString: function () {
            return "Tooltip " + this.id;
        }
    
    });

}());

(function () {

    /**
    * Panel is an implementation of Overlay that behaves like an OS window, 
    * with a draggable header and an optional close icon at the top right.
    * @namespace YAHOO.widget
    * @class Panel
    * @extends YAHOO.widget.Overlay
    * @constructor
    * @param {String} el The element ID representing the Panel <em>OR</em>
    * @param {HTMLElement} el The element representing the Panel
    * @param {Object} userConfig The configuration object literal containing 
    * the configuration that should be set for this Panel. See configuration 
    * documentation for more details.
    */
    YAHOO.widget.Panel = function (el, userConfig) {
        YAHOO.widget.Panel.superclass.constructor.call(this, el, userConfig);
    };

    var _currentModal = null;

    var Lang = YAHOO.lang,
        Util = YAHOO.util,
        Dom = Util.Dom,
        Event = Util.Event,
        CustomEvent = Util.CustomEvent,
        KeyListener = YAHOO.util.KeyListener,
        Config = Util.Config,
        Overlay = YAHOO.widget.Overlay,
        Panel = YAHOO.widget.Panel,
        UA = YAHOO.env.ua,

        bIEQuirks = (UA.ie == 6 || (UA.ie == 7 && document.compatMode == "BackCompat")),

        m_oMaskTemplate,
        m_oUnderlayTemplate,
        m_oCloseIconTemplate,

        /**
        * Constant representing the name of the Panel's events
        * @property EVENT_TYPES
        * @private
        * @final
        * @type Object
        */
        EVENT_TYPES = {
            "SHOW_MASK": "showMask",
            "HIDE_MASK": "hideMask",
            "DRAG": "drag"
        },

        /**
        * Constant representing the Panel's configuration properties
        * @property DEFAULT_CONFIG
        * @private
        * @final
        * @type Object
        */
        DEFAULT_CONFIG = {

            "CLOSE": { 
                key: "close", 
                value: true, 
                validator: Lang.isBoolean, 
                supercedes: ["visible"] 
            },

            "DRAGGABLE": {
                key: "draggable", 
                value: (Util.DD ? true : false), 
                validator: Lang.isBoolean, 
                supercedes: ["visible"]  
            },

            "DRAG_ONLY" : {
                key: "dragonly",
                value: false,
                validator: Lang.isBoolean,
                supercedes: ["draggable"]
            },

            "UNDERLAY": { 
                key: "underlay", 
                value: "shadow", 
                supercedes: ["visible"] 
            },

            "MODAL": { 
                key: "modal", 
                value: false, 
                validator: Lang.isBoolean, 
                supercedes: ["visible", "zindex"]
            },

            "KEY_LISTENERS": {
                key: "keylisteners",
                suppressEvent: true,
                supercedes: ["visible"]
            },

            "STRINGS" : {
                key: "strings",
                supercedes: ["close"],
                validator: Lang.isObject,
                value: {
                    close: "Close"
                }
            }
        };

    /**
    * Constant representing the default CSS class used for a Panel
    * @property YAHOO.widget.Panel.CSS_PANEL
    * @static
    * @final
    * @type String
    */
    Panel.CSS_PANEL = "yui-panel";
    
    /**
    * Constant representing the default CSS class used for a Panel's 
    * wrapping container
    * @property YAHOO.widget.Panel.CSS_PANEL_CONTAINER
    * @static
    * @final
    * @type String
    */
    Panel.CSS_PANEL_CONTAINER = "yui-panel-container";

    /**
     * Constant representing the default set of focusable elements 
     * on the pagewhich Modal Panels will prevent access to, when
     * the modal mask is displayed
     * 
     * @property YAHOO.widget.Panel.FOCUSABLE
     * @static
     * @type Array
     */
    Panel.FOCUSABLE = [
        "a",
        "button",
        "select",
        "textarea",
        "input",
        "iframe"
    ];

    // Private CustomEvent listeners

    /* 
        "beforeRender" event handler that creates an empty header for a Panel 
        instance if its "draggable" configuration property is set to "true" 
        and no header has been created.
    */

    function createHeader(p_sType, p_aArgs) {
        if (!this.header && this.cfg.getProperty("draggable")) {
            this.setHeader("&#160;");
        }
    }

    /* 
        "hide" event handler that sets a Panel instance's "width"
        configuration property back to its original value before 
        "setWidthToOffsetWidth" was called.
    */
    
    function restoreOriginalWidth(p_sType, p_aArgs, p_oObject) {

        var sOriginalWidth = p_oObject[0],
            sNewWidth = p_oObject[1],
            oConfig = this.cfg,
            sCurrentWidth = oConfig.getProperty("width");

        if (sCurrentWidth == sNewWidth) {
            oConfig.setProperty("width", sOriginalWidth);
        }

        this.unsubscribe("hide", restoreOriginalWidth, p_oObject);
    }

    /* 
        "beforeShow" event handler that sets a Panel instance's "width"
        configuration property to the value of its root HTML 
        elements's offsetWidth
    */

    function setWidthToOffsetWidth(p_sType, p_aArgs) {

        var nIE = YAHOO.env.ua.ie,
            oConfig,
            sOriginalWidth,
            sNewWidth;

        if (nIE == 6 || (nIE == 7 && document.compatMode == "BackCompat")) {

            oConfig = this.cfg;
            sOriginalWidth = oConfig.getProperty("width");
            
            if (!sOriginalWidth || sOriginalWidth == "auto") {
    
                sNewWidth = (this.element.offsetWidth + "px");
    
                oConfig.setProperty("width", sNewWidth);
                
                this.subscribe("hide", restoreOriginalWidth, 
                    [(sOriginalWidth || ""), sNewWidth]);
            
            }
        }
    }

    YAHOO.extend(Panel, Overlay, {

        /**
        * The Overlay initialization method, which is executed for Overlay and 
        * all of its subclasses. This method is automatically called by the 
        * constructor, and  sets up all DOM references for pre-existing markup, 
        * and creates required markup if it is not already present.
        * @method init
        * @param {String} el The element ID representing the Overlay <em>OR</em>
        * @param {HTMLElement} el The element representing the Overlay
        * @param {Object} userConfig The configuration object literal 
        * containing the configuration that should be set for this Overlay. 
        * See configuration documentation for more details.
        */
        init: function (el, userConfig) {
            /*
                 Note that we don't pass the user config in here yet because 
                 we only want it executed once, at the lowest subclass level
            */

            Panel.superclass.init.call(this, el/*, userConfig*/);

            this.beforeInitEvent.fire(Panel);

            Dom.addClass(this.element, Panel.CSS_PANEL);

            this.buildWrapper();

            if (userConfig) {
                this.cfg.applyConfig(userConfig, true);
            }

            this.subscribe("showMask", this._addFocusHandlers);
            this.subscribe("hideMask", this._removeFocusHandlers);
            this.subscribe("beforeRender", createHeader);

            this.subscribe("render", function() {
                this.setFirstLastFocusable();
                this.subscribe("changeContent", this.setFirstLastFocusable);
            });

            this.subscribe("show", this.focusFirst);

            this.initEvent.fire(Panel);
        },

        /**
         * @method _onElementFocus
         * @private
         *
         * "focus" event handler for a focuable element. Used to automatically
         * blur the element when it receives focus to ensure that a Panel
         * instance's modality is not compromised.
         *
         * @param {Event} e The DOM event object
         */
        _onElementFocus : function(e){

            var target = Event.getTarget(e);

            if (target !== this.element && !Dom.isAncestor(this.element, target) && _currentModal == this) {
                try {
                    if (this.firstElement) {
                        this.firstElement.focus();
                    } else {
                        if (this._modalFocus) {
                            this._modalFocus.focus();
                        } else {
                            this.innerElement.focus();
                        }
                    }
                } catch(err){
                    // Just in case we fail to focus
                    try {
                        if (target !== document && target !== document.body && target !== window) {
                            target.blur();
                        }
                    } catch(err2) { }
                }
            }
        },

        /** 
         *  @method _addFocusHandlers
         *  @protected
         *  
         *  "showMask" event handler that adds a "focus" event handler to all
         *  focusable elements in the document to enforce a Panel instance's 
         *  modality from being compromised.
         *
         *  @param p_sType {String} Custom event type
         *  @param p_aArgs {Array} Custom event arguments
         */
        _addFocusHandlers: function(p_sType, p_aArgs) {
            if (!this.firstElement) {
                if (UA.webkit || UA.opera) {
                    if (!this._modalFocus) {
                        this._createHiddenFocusElement();
                    }
                } else {
                    this.innerElement.tabIndex = 0;
                }
            }
            this.setTabLoop(this.firstElement, this.lastElement);
            Event.onFocus(document.documentElement, this._onElementFocus, this, true);
            _currentModal = this;
        },

        /**
         * Creates a hidden focusable element, used to focus on,
         * to enforce modality for browsers in which focus cannot
         * be applied to the container box.
         * 
         * @method _createHiddenFocusElement
         * @private
         */
        _createHiddenFocusElement : function() {
            var e = document.createElement("button");
            e.style.height = "1px";
            e.style.width = "1px";
            e.style.position = "absolute";
            e.style.left = "-10000em";
            e.style.opacity = 0;
            e.tabIndex = "-1";
            this.innerElement.appendChild(e);
            this._modalFocus = e;
        },

        /**
         *  @method _removeFocusHandlers
         *  @protected
         *
         *  "hideMask" event handler that removes all "focus" event handlers added 
         *  by the "addFocusEventHandlers" method.
         *
         *  @param p_sType {String} Event type
         *  @param p_aArgs {Array} Event Arguments
         */
        _removeFocusHandlers: function(p_sType, p_aArgs) {
            Event.removeFocusListener(document.documentElement, this._onElementFocus, this);

            if (_currentModal == this) {
                _currentModal = null;
            }
        },

        /**
         * Sets focus to the first element in the Panel.
         *
         * @method focusFirst
         */
        focusFirst: function (type, args, obj) {
            var el = this.firstElement;

            if (args && args[1]) {
                Event.stopEvent(args[1]);
            }

            if (el) {
                try {
                    el.focus();
                } catch(err) {
                    // Ignore
                }
            }
        },

        /**
         * Sets focus to the last element in the Panel.
         *
         * @method focusLast
         */
        focusLast: function (type, args, obj) {
            var el = this.lastElement;

            if (args && args[1]) {
                Event.stopEvent(args[1]);
            }

            if (el) {
                try {
                    el.focus();
                } catch(err) {
                    // Ignore
                }
            }
        },

        /**
         * Sets up a tab, shift-tab loop between the first and last elements
         * provided. NOTE: Sets up the preventBackTab and preventTabOut KeyListener
         * instance properties, which are reset everytime this method is invoked.
         *
         * @method setTabLoop
         * @param {HTMLElement} firstElement
         * @param {HTMLElement} lastElement
         *
         */
        setTabLoop : function(firstElement, lastElement) {

            var backTab = this.preventBackTab, tab = this.preventTabOut,
                showEvent = this.showEvent, hideEvent = this.hideEvent;

            if (backTab) {
                backTab.disable();
                showEvent.unsubscribe(backTab.enable, backTab);
                hideEvent.unsubscribe(backTab.disable, backTab);
                backTab = this.preventBackTab = null;
            }

            if (tab) {
                tab.disable();
                showEvent.unsubscribe(tab.enable, tab);
                hideEvent.unsubscribe(tab.disable,tab);
                tab = this.preventTabOut = null;
            }

            if (firstElement) {
                this.preventBackTab = new KeyListener(firstElement, 
                    {shift:true, keys:9},
                    {fn:this.focusLast, scope:this, correctScope:true}
                );
                backTab = this.preventBackTab;

                showEvent.subscribe(backTab.enable, backTab, true);
                hideEvent.subscribe(backTab.disable,backTab, true);
            }

            if (lastElement) {
                this.preventTabOut = new KeyListener(lastElement, 
                    {shift:false, keys:9}, 
                    {fn:this.focusFirst, scope:this, correctScope:true}
                );
                tab = this.preventTabOut;

                showEvent.subscribe(tab.enable, tab, true);
                hideEvent.subscribe(tab.disable,tab, true);
            }
        },

        /**
         * Returns an array of the currently focusable items which reside within
         * Panel. The set of focusable elements the method looks for are defined
         * in the Panel.FOCUSABLE static property
         *
         * @method getFocusableElements
         * @param {HTMLElement} root element to start from.
         */
        getFocusableElements : function(root) {

            root = root || this.innerElement;

            var focusable = {};
            for (var i = 0; i < Panel.FOCUSABLE.length; i++) {
                focusable[Panel.FOCUSABLE[i]] = true;
            }

            function isFocusable(el) {
                if (el.focus && el.type !== "hidden" && !el.disabled && focusable[el.tagName.toLowerCase()]) {
                    return true;
                }
                return false;
            }

            // Not looking by Tag, since we want elements in DOM order
            return Dom.getElementsBy(isFocusable, null, root);
        },

        /**
         * Sets the firstElement and lastElement instance properties
         * to the first and last focusable elements in the Panel.
         *
         * @method setFirstLastFocusable
         */
        setFirstLastFocusable : function() {

            this.firstElement = null;
            this.lastElement = null;

            var elements = this.getFocusableElements();
            this.focusableElements = elements;

            if (elements.length > 0) {
                this.firstElement = elements[0];
                this.lastElement = elements[elements.length - 1];
            }

            if (this.cfg.getProperty("modal")) {
                this.setTabLoop(this.firstElement, this.lastElement);
            }
        },

        /**
         * Initializes the custom events for Module which are fired 
         * automatically at appropriate times by the Module class.
         */
        initEvents: function () {
            Panel.superclass.initEvents.call(this);

            var SIGNATURE = CustomEvent.LIST;

            /**
            * CustomEvent fired after the modality mask is shown
            * @event showMaskEvent
            */
            this.showMaskEvent = this.createEvent(EVENT_TYPES.SHOW_MASK);
            this.showMaskEvent.signature = SIGNATURE;

            /**
            * CustomEvent fired after the modality mask is hidden
            * @event hideMaskEvent
            */
            this.hideMaskEvent = this.createEvent(EVENT_TYPES.HIDE_MASK);
            this.hideMaskEvent.signature = SIGNATURE;

            /**
            * CustomEvent when the Panel is dragged
            * @event dragEvent
            */
            this.dragEvent = this.createEvent(EVENT_TYPES.DRAG);
            this.dragEvent.signature = SIGNATURE;
        },

        /**
         * Initializes the class's configurable properties which can be changed 
         * using the Panel's Config object (cfg).
         * @method initDefaultConfig
         */
        initDefaultConfig: function () {
            Panel.superclass.initDefaultConfig.call(this);

            // Add panel config properties //

            /**
            * True if the Panel should display a "close" button
            * @config close
            * @type Boolean
            * @default true
            */
            this.cfg.addProperty(DEFAULT_CONFIG.CLOSE.key, { 
                handler: this.configClose, 
                value: DEFAULT_CONFIG.CLOSE.value, 
                validator: DEFAULT_CONFIG.CLOSE.validator, 
                supercedes: DEFAULT_CONFIG.CLOSE.supercedes 
            });

            /**
            * Boolean specifying if the Panel should be draggable.  The default 
            * value is "true" if the Drag and Drop utility is included, 
            * otherwise it is "false." <strong>PLEASE NOTE:</strong> There is a 
            * known issue in IE 6 (Strict Mode and Quirks Mode) and IE 7 
            * (Quirks Mode) where Panels that either don't have a value set for 
            * their "width" configuration property, or their "width" 
            * configuration property is set to "auto" will only be draggable by
            * placing the mouse on the text of the Panel's header element.
            * To fix this bug, draggable Panels missing a value for their 
            * "width" configuration property, or whose "width" configuration 
            * property is set to "auto" will have it set to the value of 
            * their root HTML element's offsetWidth before they are made 
            * visible.  The calculated width is then removed when the Panel is   
            * hidden. <em>This fix is only applied to draggable Panels in IE 6 
            * (Strict Mode and Quirks Mode) and IE 7 (Quirks Mode)</em>. For 
            * more information on this issue see:
            * SourceForge bugs #1726972 and #1589210.
            * @config draggable
            * @type Boolean
            * @default true
            */
            this.cfg.addProperty(DEFAULT_CONFIG.DRAGGABLE.key, {
                handler: this.configDraggable,
                value: (Util.DD) ? true : false,
                validator: DEFAULT_CONFIG.DRAGGABLE.validator,
                supercedes: DEFAULT_CONFIG.DRAGGABLE.supercedes
            });

            /**
            * Boolean specifying if the draggable Panel should be drag only, not interacting with drop 
            * targets on the page.
            * <p>
            * When set to true, draggable Panels will not check to see if they are over drop targets,
            * or fire the DragDrop events required to support drop target interaction (onDragEnter, 
            * onDragOver, onDragOut, onDragDrop etc.).
            * If the Panel is not designed to be dropped on any target elements on the page, then this 
            * flag can be set to true to improve performance.
            * </p>
            * <p>
            * When set to false, all drop target related events will be fired.
            * </p>
            * <p>
            * The property is set to false by default to maintain backwards compatibility but should be 
            * set to true if drop target interaction is not required for the Panel, to improve performance.</p>
            * 
            * @config dragOnly
            * @type Boolean
            * @default false
            */
            this.cfg.addProperty(DEFAULT_CONFIG.DRAG_ONLY.key, { 
                value: DEFAULT_CONFIG.DRAG_ONLY.value, 
                validator: DEFAULT_CONFIG.DRAG_ONLY.validator, 
                supercedes: DEFAULT_CONFIG.DRAG_ONLY.supercedes 
            });

            /**
            * Sets the type of underlay to display for the Panel. Valid values 
            * are "shadow," "matte," and "none".  <strong>PLEASE NOTE:</strong> 
            * The creation of the underlay element is deferred until the Panel 
            * is initially made visible.  For Gecko-based browsers on Mac
            * OS X the underlay elment is always created as it is used as a 
            * shim to prevent Aqua scrollbars below a Panel instance from poking 
            * through it (See SourceForge bug #836476).
            * @config underlay
            * @type String
            * @default shadow
            */
            this.cfg.addProperty(DEFAULT_CONFIG.UNDERLAY.key, { 
                handler: this.configUnderlay, 
                value: DEFAULT_CONFIG.UNDERLAY.value, 
                supercedes: DEFAULT_CONFIG.UNDERLAY.supercedes 
            });
        
            /**
            * True if the Panel should be displayed in a modal fashion, 
            * automatically creating a transparent mask over the document that
            * will not be removed until the Panel is dismissed.
            * @config modal
            * @type Boolean
            * @default false
            */
            this.cfg.addProperty(DEFAULT_CONFIG.MODAL.key, { 
                handler: this.configModal, 
                value: DEFAULT_CONFIG.MODAL.value,
                validator: DEFAULT_CONFIG.MODAL.validator, 
                supercedes: DEFAULT_CONFIG.MODAL.supercedes 
            });

            /**
            * A KeyListener (or array of KeyListeners) that will be enabled 
            * when the Panel is shown, and disabled when the Panel is hidden.
            * @config keylisteners
            * @type YAHOO.util.KeyListener[]
            * @default null
            */
            this.cfg.addProperty(DEFAULT_CONFIG.KEY_LISTENERS.key, { 
                handler: this.configKeyListeners, 
                suppressEvent: DEFAULT_CONFIG.KEY_LISTENERS.suppressEvent, 
                supercedes: DEFAULT_CONFIG.KEY_LISTENERS.supercedes 
            });

            /**
            * UI Strings used by the Panel
            * 
            * @config strings
            * @type Object
            * @default An object literal with the properties shown below:
            *     <dl>
            *         <dt>close</dt><dd><em>String</em> : The string to use for the close icon. Defaults to "Close".</dd>
            *     </dl>
            */
            this.cfg.addProperty(DEFAULT_CONFIG.STRINGS.key, { 
                value:DEFAULT_CONFIG.STRINGS.value,
                handler:this.configStrings,
                validator:DEFAULT_CONFIG.STRINGS.validator,
                supercedes:DEFAULT_CONFIG.STRINGS.supercedes
            });
        },

        // BEGIN BUILT-IN PROPERTY EVENT HANDLERS //
        
        /**
        * The default event handler fired when the "close" property is changed.
        * The method controls the appending or hiding of the close icon at the 
        * top right of the Panel.
        * @method configClose
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configClose: function (type, args, obj) {

            var val = args[0],
                oClose = this.close,
                strings = this.cfg.getProperty("strings");

            if (val) {
                if (!oClose) {

                    if (!m_oCloseIconTemplate) {
                        m_oCloseIconTemplate = document.createElement("a");
                        m_oCloseIconTemplate.className = "container-close";
                        m_oCloseIconTemplate.href = "#";
                    }

                    oClose = m_oCloseIconTemplate.cloneNode(true);
                    this.innerElement.appendChild(oClose);

                    oClose.innerHTML = (strings && strings.close) ? strings.close : "&#160;";

                    Event.on(oClose, "click", this._doClose, this, true);

                    this.close = oClose;

                } else {
                    oClose.style.display = "block";
                }

            } else {
                if (oClose) {
                    oClose.style.display = "none";
                }
            }

        },

        /**
         * Event handler for the close icon
         * 
         * @method _doClose
         * @protected
         * 
         * @param {DOMEvent} e
         */
        _doClose : function (e) {
            Event.preventDefault(e);
            this.hide();
        },

        /**
        * The default event handler fired when the "draggable" property 
        * is changed.
        * @method configDraggable
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configDraggable: function (type, args, obj) {
            var val = args[0];

            if (val) {
                if (!Util.DD) {
                    this.cfg.setProperty("draggable", false);
                    return;
                }

                if (this.header) {
                    Dom.setStyle(this.header, "cursor", "move");
                    this.registerDragDrop();
                }

                this.subscribe("beforeShow", setWidthToOffsetWidth);

            } else {

                if (this.dd) {
                    this.dd.unreg();
                }

                if (this.header) {
                    Dom.setStyle(this.header,"cursor","auto");
                }

                this.unsubscribe("beforeShow", setWidthToOffsetWidth);
            }
        },
      
        /**
        * The default event handler fired when the "underlay" property 
        * is changed.
        * @method configUnderlay
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configUnderlay: function (type, args, obj) {

            var bMacGecko = (this.platform == "mac" && UA.gecko),
                sUnderlay = args[0].toLowerCase(),
                oUnderlay = this.underlay,
                oElement = this.element;
                
            function fixWebkitUnderlay() {
                // Webkit 419.3 (Safari 2.x) does not update
                // it's Render Tree for the Container when content changes. 
                // We need to force it to update using this contentChange 
                // listener

                // Webkit 523.6 doesn't have this problem and doesn't 
                // need the fix
                var u = this.underlay;
                Dom.addClass(u, "yui-force-redraw");
                window.setTimeout(function(){Dom.removeClass(u, "yui-force-redraw");}, 0);
            }

            function createUnderlay() {
                var bNew = false;
                if (!oUnderlay) { // create if not already in DOM

                    if (!m_oUnderlayTemplate) {
                        m_oUnderlayTemplate = document.createElement("div");
                        m_oUnderlayTemplate.className = "underlay";
                    }

                    oUnderlay = m_oUnderlayTemplate.cloneNode(false);
                    this.element.appendChild(oUnderlay);

                    this.underlay = oUnderlay;

                    if (bIEQuirks) {
                        this.sizeUnderlay();
                        this.cfg.subscribeToConfigEvent("width", this.sizeUnderlay);
                        this.cfg.subscribeToConfigEvent("height", this.sizeUnderlay);

                        this.changeContentEvent.subscribe(this.sizeUnderlay);
                        YAHOO.widget.Module.textResizeEvent.subscribe(this.sizeUnderlay, this, true);
                    }

                    if (UA.webkit && UA.webkit < 420) {
                        this.changeContentEvent.subscribe(fixWebkitUnderlay);
                    }
                    bNew = true;
                }
            }

            function onBeforeShow() {
                var bNew = createUnderlay.call(this);
                if (!bNew && bIEQuirks) {
                    this.sizeUnderlay();
                }
                this._underlayDeferred = false;
                this.beforeShowEvent.unsubscribe(onBeforeShow);
            }

            function destroyUnderlay() {
                if (this._underlayDeferred) {
                    this.beforeShowEvent.unsubscribe(onBeforeShow);
                    this._underlayDeferred = false;
                }

                if (oUnderlay) {
                    this.cfg.unsubscribeFromConfigEvent("width", this.sizeUnderlay);
                    this.cfg.unsubscribeFromConfigEvent("height",this.sizeUnderlay);
                    this.changeContentEvent.unsubscribe(this.sizeUnderlay);
                    this.changeContentEvent.unsubscribe(fixWebkitUnderlay);
                    YAHOO.widget.Module.textResizeEvent.unsubscribe(this.sizeUnderlay, this, true);

                    this.element.removeChild(oUnderlay);

                    this.underlay = null;
                }
            }

            switch (sUnderlay) {
                case "shadow":
                    Dom.removeClass(oElement, "matte");
                    Dom.addClass(oElement, "shadow");
                    break;
                case "matte":
                    if (!bMacGecko) {
                        destroyUnderlay.call(this);
                    }
                    Dom.removeClass(oElement, "shadow");
                    Dom.addClass(oElement, "matte");
                    break;
                default:
                    if (!bMacGecko) {
                        destroyUnderlay.call(this);
                    }
                    Dom.removeClass(oElement, "shadow");
                    Dom.removeClass(oElement, "matte");
                    break;
            }

            if ((sUnderlay == "shadow") || (bMacGecko && !oUnderlay)) {
                if (this.cfg.getProperty("visible")) {
                    var bNew = createUnderlay.call(this);
                    if (!bNew && bIEQuirks) {
                        this.sizeUnderlay();
                    }
                } else {
                    if (!this._underlayDeferred) {
                        this.beforeShowEvent.subscribe(onBeforeShow);
                        this._underlayDeferred = true;
                    }
                }
            }
        },
        
        /**
        * The default event handler fired when the "modal" property is 
        * changed. This handler subscribes or unsubscribes to the show and hide
        * events to handle the display or hide of the modality mask.
        * @method configModal
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configModal: function (type, args, obj) {

            var modal = args[0];
            if (modal) {
                if (!this._hasModalityEventListeners) {

                    this.subscribe("beforeShow", this.buildMask);
                    this.subscribe("beforeShow", this.bringToTop);
                    this.subscribe("beforeShow", this.showMask);
                    this.subscribe("hide", this.hideMask);

                    Overlay.windowResizeEvent.subscribe(this.sizeMask, 
                        this, true);

                    this._hasModalityEventListeners = true;
                }
            } else {
                if (this._hasModalityEventListeners) {

                    if (this.cfg.getProperty("visible")) {
                        this.hideMask();
                        this.removeMask();
                    }

                    this.unsubscribe("beforeShow", this.buildMask);
                    this.unsubscribe("beforeShow", this.bringToTop);
                    this.unsubscribe("beforeShow", this.showMask);
                    this.unsubscribe("hide", this.hideMask);

                    Overlay.windowResizeEvent.unsubscribe(this.sizeMask, this);

                    this._hasModalityEventListeners = false;
                }
            }
        },

        /**
        * Removes the modality mask.
        * @method removeMask
        */
        removeMask: function () {

            var oMask = this.mask,
                oParentNode;

            if (oMask) {
                /*
                    Hide the mask before destroying it to ensure that DOM
                    event handlers on focusable elements get removed.
                */
                this.hideMask();

                oParentNode = oMask.parentNode;
                if (oParentNode) {
                    oParentNode.removeChild(oMask);
                }

                this.mask = null;
            }
        },
        
        /**
        * The default event handler fired when the "keylisteners" property 
        * is changed.
        * @method configKeyListeners
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configKeyListeners: function (type, args, obj) {

            var listeners = args[0],
                listener,
                nListeners,
                i;
        
            if (listeners) {

                if (listeners instanceof Array) {

                    nListeners = listeners.length;

                    for (i = 0; i < nListeners; i++) {

                        listener = listeners[i];
        
                        if (!Config.alreadySubscribed(this.showEvent, 
                            listener.enable, listener)) {

                            this.showEvent.subscribe(listener.enable, 
                                listener, true);

                        }

                        if (!Config.alreadySubscribed(this.hideEvent, 
                            listener.disable, listener)) {

                            this.hideEvent.subscribe(listener.disable, 
                                listener, true);

                            this.destroyEvent.subscribe(listener.disable, 
                                listener, true);
                        }
                    }

                } else {

                    if (!Config.alreadySubscribed(this.showEvent, 
                        listeners.enable, listeners)) {

                        this.showEvent.subscribe(listeners.enable, 
                            listeners, true);
                    }

                    if (!Config.alreadySubscribed(this.hideEvent, 
                        listeners.disable, listeners)) {

                        this.hideEvent.subscribe(listeners.disable, 
                            listeners, true);

                        this.destroyEvent.subscribe(listeners.disable, 
                            listeners, true);

                    }

                }

            }

        },

        /**
        * The default handler for the "strings" property
        * @method configStrings
        */
        configStrings : function(type, args, obj) {
            var val = Lang.merge(DEFAULT_CONFIG.STRINGS.value, args[0]);
            this.cfg.setProperty(DEFAULT_CONFIG.STRINGS.key, val, true);
        },

        /**
        * The default event handler fired when the "height" property is changed.
        * @method configHeight
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configHeight: function (type, args, obj) {
            var height = args[0],
                el = this.innerElement;

            Dom.setStyle(el, "height", height);
            this.cfg.refireEvent("iframe");
        },

        /**
         * The default custom event handler executed when the Panel's height is changed, 
         * if the autofillheight property has been set.
         *
         * @method _autoFillOnHeightChange
         * @protected
         * @param {String} type The event type
         * @param {Array} args The array of arguments passed to event subscribers
         * @param {HTMLElement} el The header, body or footer element which is to be resized to fill
         * out the containers height
         */
        _autoFillOnHeightChange : function(type, args, el) {
            Panel.superclass._autoFillOnHeightChange.apply(this, arguments);
            if (bIEQuirks) {
                this.sizeUnderlay();
            }
        },

        /**
        * The default event handler fired when the "width" property is changed.
        * @method configWidth
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configWidth: function (type, args, obj) {
    
            var width = args[0],
                el = this.innerElement;
    
            Dom.setStyle(el, "width", width);
            this.cfg.refireEvent("iframe");
    
        },
        
        /**
        * The default event handler fired when the "zIndex" property is changed.
        * @method configzIndex
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configzIndex: function (type, args, obj) {
            Panel.superclass.configzIndex.call(this, type, args, obj);

            if (this.mask || this.cfg.getProperty("modal") === true) {
                var panelZ = Dom.getStyle(this.element, "zIndex");
                if (!panelZ || isNaN(panelZ)) {
                    panelZ = 0;
                }

                if (panelZ === 0) {
                    // Recursive call to configzindex (which should be stopped
                    // from going further because panelZ should no longer === 0)
                    this.cfg.setProperty("zIndex", 1);
                } else {
                    this.stackMask();
                }
            }
        },

        // END BUILT-IN PROPERTY EVENT HANDLERS //
        /**
        * Builds the wrapping container around the Panel that is used for 
        * positioning the shadow and matte underlays. The container element is 
        * assigned to a  local instance variable called container, and the 
        * element is reinserted inside of it.
        * @method buildWrapper
        */
        buildWrapper: function () {

            var elementParent = this.element.parentNode,
                originalElement = this.element,
                wrapper = document.createElement("div");

            wrapper.className = Panel.CSS_PANEL_CONTAINER;
            wrapper.id = originalElement.id + "_c";

            if (elementParent) {
                elementParent.insertBefore(wrapper, originalElement);
            }

            wrapper.appendChild(originalElement);

            this.element = wrapper;
            this.innerElement = originalElement;

            Dom.setStyle(this.innerElement, "visibility", "inherit");
        },

        /**
        * Adjusts the size of the shadow based on the size of the element.
        * @method sizeUnderlay
        */
        sizeUnderlay: function () {
            var oUnderlay = this.underlay,
                oElement;

            if (oUnderlay) {
                oElement = this.element;
                oUnderlay.style.width = oElement.offsetWidth + "px";
                oUnderlay.style.height = oElement.offsetHeight + "px";
            }
        },

        
        /**
        * Registers the Panel's header for drag & drop capability.
        * @method registerDragDrop
        */
        registerDragDrop: function () {

            var me = this;

            if (this.header) {

                if (!Util.DD) {
                    return;
                }

                var bDragOnly = (this.cfg.getProperty("dragonly") === true);
                this.dd = new Util.DD(this.element.id, this.id, {dragOnly: bDragOnly});

                if (!this.header.id) {
                    this.header.id = this.id + "_h";
                }

                this.dd.startDrag = function () {

                    var offsetHeight,
                        offsetWidth,
                        viewPortWidth,
                        viewPortHeight,
                        scrollX,
                        scrollY;

                    if (YAHOO.env.ua.ie == 6) {
                        Dom.addClass(me.element,"drag");
                    }

                    if (me.cfg.getProperty("constraintoviewport")) {

                        var nViewportOffset = Overlay.VIEWPORT_OFFSET;

                        offsetHeight = me.element.offsetHeight;
                        offsetWidth = me.element.offsetWidth;

                        viewPortWidth = Dom.getViewportWidth();
                        viewPortHeight = Dom.getViewportHeight();

                        scrollX = Dom.getDocumentScrollLeft();
                        scrollY = Dom.getDocumentScrollTop();

                        if (offsetHeight + nViewportOffset < viewPortHeight) {
                            this.minY = scrollY + nViewportOffset;
                            this.maxY = scrollY + viewPortHeight - offsetHeight - nViewportOffset;
                        } else {
                            this.minY = scrollY + nViewportOffset;
                            this.maxY = scrollY + nViewportOffset;
                        }

                        if (offsetWidth + nViewportOffset < viewPortWidth) {
                            this.minX = scrollX + nViewportOffset;
                            this.maxX = scrollX + viewPortWidth - offsetWidth - nViewportOffset;
                        } else {
                            this.minX = scrollX + nViewportOffset;
                            this.maxX = scrollX + nViewportOffset;
                        }

                        this.constrainX = true;
                        this.constrainY = true;
                    } else {
                        this.constrainX = false;
                        this.constrainY = false;
                    }

                    me.dragEvent.fire("startDrag", arguments);
                };

                this.dd.onDrag = function () {
                    me.syncPosition();
                    me.cfg.refireEvent("iframe");
                    if (this.platform == "mac" && YAHOO.env.ua.gecko) {
                        this.showMacGeckoScrollbars();
                    }

                    me.dragEvent.fire("onDrag", arguments);
                };

                this.dd.endDrag = function () {

                    if (YAHOO.env.ua.ie == 6) {
                        Dom.removeClass(me.element,"drag");
                    }

                    me.dragEvent.fire("endDrag", arguments);
                    me.moveEvent.fire(me.cfg.getProperty("xy"));

                };

                this.dd.setHandleElId(this.header.id);
                this.dd.addInvalidHandleType("INPUT");
                this.dd.addInvalidHandleType("SELECT");
                this.dd.addInvalidHandleType("TEXTAREA");
            }
        },
        
        /**
        * Builds the mask that is laid over the document when the Panel is 
        * configured to be modal.
        * @method buildMask
        */
        buildMask: function () {
            var oMask = this.mask;
            if (!oMask) {
                if (!m_oMaskTemplate) {
                    m_oMaskTemplate = document.createElement("div");
                    m_oMaskTemplate.className = "mask";
                    m_oMaskTemplate.innerHTML = "&#160;";
                }
                oMask = m_oMaskTemplate.cloneNode(true);
                oMask.id = this.id + "_mask";

                document.body.insertBefore(oMask, document.body.firstChild);

                this.mask = oMask;

                if (YAHOO.env.ua.gecko && this.platform == "mac") {
                    Dom.addClass(this.mask, "block-scrollbars");
                }

                // Stack mask based on the element zindex
                this.stackMask();
            }
        },

        /**
        * Hides the modality mask.
        * @method hideMask
        */
        hideMask: function () {
            if (this.cfg.getProperty("modal") && this.mask) {
                this.mask.style.display = "none";
                Dom.removeClass(document.body, "masked");
                this.hideMaskEvent.fire();
            }
        },

        /**
        * Shows the modality mask.
        * @method showMask
        */
        showMask: function () {
            if (this.cfg.getProperty("modal") && this.mask) {
                Dom.addClass(document.body, "masked");
                this.sizeMask();
                this.mask.style.display = "block";
                this.showMaskEvent.fire();
            }
        },

        /**
        * Sets the size of the modality mask to cover the entire scrollable 
        * area of the document
        * @method sizeMask
        */
        sizeMask: function () {
            if (this.mask) {

                // Shrink mask first, so it doesn't affect the document size.
                var mask = this.mask,
                    viewWidth = Dom.getViewportWidth(),
                    viewHeight = Dom.getViewportHeight();

                if (this.mask.offsetHeight > viewHeight) {
                    this.mask.style.height = viewHeight + "px";
                }

                if (this.mask.offsetWidth > viewWidth) {
                    this.mask.style.width = viewWidth + "px";
                }

                // Then size it to the document
                this.mask.style.height = Dom.getDocumentHeight() + "px";
                this.mask.style.width = Dom.getDocumentWidth() + "px";
            }
        },

        /**
         * Sets the zindex of the mask, if it exists, based on the zindex of 
         * the Panel element. The zindex of the mask is set to be one less 
         * than the Panel element's zindex.
         * 
         * <p>NOTE: This method will not bump up the zindex of the Panel
         * to ensure that the mask has a non-negative zindex. If you require the
         * mask zindex to be 0 or higher, the zindex of the Panel 
         * should be set to a value higher than 0, before this method is called.
         * </p>
         * @method stackMask
         */
        stackMask: function() {
            if (this.mask) {
                var panelZ = Dom.getStyle(this.element, "zIndex");
                if (!YAHOO.lang.isUndefined(panelZ) && !isNaN(panelZ)) {
                    Dom.setStyle(this.mask, "zIndex", panelZ - 1);
                }
            }
        },

        /**
        * Renders the Panel by inserting the elements that are not already in 
        * the main Panel into their correct places. Optionally appends the 
        * Panel to the specified node prior to the render's execution. NOTE: 
        * For Panels without existing markup, the appendToNode argument is 
        * REQUIRED. If this argument is ommitted and the current element is 
        * not present in the document, the function will return false, 
        * indicating that the render was a failure.
        * @method render
        * @param {String} appendToNode The element id to which the Module 
        * should be appended to prior to rendering <em>OR</em>
        * @param {HTMLElement} appendToNode The element to which the Module 
        * should be appended to prior to rendering
        * @return {boolean} Success or failure of the render
        */
        render: function (appendToNode) {

            return Panel.superclass.render.call(this, 
                appendToNode, this.innerElement);

        },
        
        /**
        * Removes the Panel element from the DOM and sets all child elements
        * to null.
        * @method destroy
        */
        destroy: function () {
            Overlay.windowResizeEvent.unsubscribe(this.sizeMask, this);
            this.removeMask();
            if (this.close) {
                Event.purgeElement(this.close);
            }
            Panel.superclass.destroy.call(this);  
        },
        
        /**
        * Returns a String representation of the object.
        * @method toString
        * @return {String} The string representation of the Panel.
        */
        toString: function () {
            return "Panel " + this.id;
        }
    
    });

}());

(function () {

    /**
    * <p>
    * Dialog is an implementation of Panel that can be used to submit form 
    * data.
    * </p>
    * <p>
    * Built-in functionality for buttons with event handlers is included. 
    * If the optional YUI Button dependancy is included on the page, the buttons
    * created will be instances of YAHOO.widget.Button, otherwise regular HTML buttons
    * will be created.
    * </p>
    * <p>
    * Forms can be processed in 3 ways -- via an asynchronous Connection utility call, 
    * a simple form POST or GET, or manually. The YUI Connection utility should be
    * included if you're using the default "async" postmethod, but is not required if
    * you're using any of the other postmethod values.
    * </p>
    * @namespace YAHOO.widget
    * @class Dialog
    * @extends YAHOO.widget.Panel
    * @constructor
    * @param {String} el The element ID representing the Dialog <em>OR</em>
    * @param {HTMLElement} el The element representing the Dialog
    * @param {Object} userConfig The configuration object literal containing 
    * the configuration that should be set for this Dialog. See configuration 
    * documentation for more details.
    */
    YAHOO.widget.Dialog = function (el, userConfig) {
        YAHOO.widget.Dialog.superclass.constructor.call(this, el, userConfig);
    };

    var Event = YAHOO.util.Event,
        CustomEvent = YAHOO.util.CustomEvent,
        Dom = YAHOO.util.Dom,
        Dialog = YAHOO.widget.Dialog,
        Lang = YAHOO.lang,

        /**
         * Constant representing the name of the Dialog's events
         * @property EVENT_TYPES
         * @private
         * @final
         * @type Object
         */
        EVENT_TYPES = {
            "BEFORE_SUBMIT": "beforeSubmit",
            "SUBMIT": "submit",
            "MANUAL_SUBMIT": "manualSubmit",
            "ASYNC_SUBMIT": "asyncSubmit",
            "FORM_SUBMIT": "formSubmit",
            "CANCEL": "cancel"
        },

        /**
        * Constant representing the Dialog's configuration properties
        * @property DEFAULT_CONFIG
        * @private
        * @final
        * @type Object
        */
        DEFAULT_CONFIG = {

            "POST_METHOD": { 
                key: "postmethod", 
                value: "async"
            },

            "BUTTONS": {
                key: "buttons",
                value: "none",
                supercedes: ["visible"]
            },

            "HIDEAFTERSUBMIT" : {
                key: "hideaftersubmit",
                value: true
            }
        };

    /**
    * Constant representing the default CSS class used for a Dialog
    * @property YAHOO.widget.Dialog.CSS_DIALOG
    * @static
    * @final
    * @type String
    */
    Dialog.CSS_DIALOG = "yui-dialog";

    function removeButtonEventHandlers() {

        var aButtons = this._aButtons,
            nButtons,
            oButton,
            i;

        if (Lang.isArray(aButtons)) {
            nButtons = aButtons.length;

            if (nButtons > 0) {
                i = nButtons - 1;
                do {
                    oButton = aButtons[i];

                    if (YAHOO.widget.Button && oButton instanceof YAHOO.widget.Button) {
                        oButton.destroy();
                    }
                    else if (oButton.tagName.toUpperCase() == "BUTTON") {
                        Event.purgeElement(oButton);
                        Event.purgeElement(oButton, false);
                    }
                }
                while (i--);
            }
        }
    }

    YAHOO.extend(Dialog, YAHOO.widget.Panel, { 

        /**
        * @property form
        * @description Object reference to the Dialog's 
        * <code>&#60;form&#62;</code> element.
        * @default null 
        * @type <a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
        * level-one-html.html#ID-40002357">HTMLFormElement</a>
        */
        form: null,
    
        /**
        * Initializes the class's configurable properties which can be changed 
        * using the Dialog's Config object (cfg).
        * @method initDefaultConfig
        */
        initDefaultConfig: function () {
            Dialog.superclass.initDefaultConfig.call(this);

            /**
            * The internally maintained callback object for use with the 
            * Connection utility. The format of the callback object is 
            * similar to Connection Manager's callback object and is 
            * simply passed through to Connection Manager when the async 
            * request is made.
            * @property callback
            * @type Object
            */
            this.callback = {

                /**
                * The function to execute upon success of the 
                * Connection submission (when the form does not
                * contain a file input element).
                * 
                * @property callback.success
                * @type Function
                */
                success: null,

                /**
                * The function to execute upon failure of the 
                * Connection submission
                * @property callback.failure
                * @type Function
                */
                failure: null,

                /**
                 *<p>
                * The function to execute upon success of the 
                * Connection submission, when the form contains
                * a file input element.
                * </p>
                * <p>
                * <em>NOTE:</em> Connection manager will not
                * invoke the success or failure handlers for the file
                * upload use case. This will be the only callback
                * handler invoked.
                * </p>
                * <p>
                * For more information, see the <a href="http://developer.yahoo.com/yui/connection/#file">
                * Connection Manager documenation on file uploads</a>.
                * </p>
                * @property callback.upload
                * @type Function
                */

                /**
                * The arbitraty argument or arguments to pass to the Connection 
                * callback functions
                * @property callback.argument
                * @type Object
                */
                argument: null

            };

            // Add form dialog config properties //
            /**
            * The method to use for posting the Dialog's form. Possible values 
            * are "async", "form", and "manual".
            * @config postmethod
            * @type String
            * @default async
            */
            this.cfg.addProperty(DEFAULT_CONFIG.POST_METHOD.key, {
                handler: this.configPostMethod, 
                value: DEFAULT_CONFIG.POST_METHOD.value, 
                validator: function (val) {
                    if (val != "form" && val != "async" && val != "none" && 
                        val != "manual") {
                        return false;
                    } else {
                        return true;
                    }
                }
            });

            /**
            * This property is used to configure whether or not the 
            * dialog should be automatically hidden after submit.
            * 
            * @config hideaftersubmit
            * @type Boolean
            * @default true
            */
            this.cfg.addProperty(DEFAULT_CONFIG.HIDEAFTERSUBMIT.key, {
                value: DEFAULT_CONFIG.HIDEAFTERSUBMIT.value
            }); 

            /**
            * Array of object literals, each containing a set of properties 
            * defining a button to be appended into the Dialog's footer.
            * 
            * Each button object in the buttons array can have three properties:
            * <dt>text:</dt>
            * <dd>The text that will display on the face of the button. The text can 
            * include HTML, as long as it is compliant with HTML Button specifications.
            * </dd>
            * <dt>handler:</dt>
            * <dd>Can be either:
            *     <ol>
            *         <li>A reference to a function that should fire when the 
            * button is clicked.  (In this case scope of this function is 
            * always its Dialog instance.)</li>
            *         <li>An object literal representing the code to be 
            * executed when the button is clicked.  Format:<br> <code> {<br>
            * <strong>fn:</strong> Function,   &#47;&#47; The handler to call 
            * when  the event fires.<br> <strong>obj:</strong> Object,
            * &#47;&#47; An  object to pass back to the handler.<br> <strong>
            * scope:</strong>  Object &#47;&#47; The object to use for the 
            * scope of the handler. <br> } </code> <br></li>
            *     </ol>
            * </dd>
            * <dt>isDefault:</dt>
            * <dd>An optional boolean value that specifies that a button 
            * should be highlighted and focused by default.</dd>
            * 
            * <em>NOTE:</em>If the YUI Button Widget is included on the page, 
            * the buttons created will be instances of YAHOO.widget.Button. 
            * Otherwise, HTML Buttons (<code>&#60;BUTTON&#62;</code>) will be 
            * created.
            * 
            * @config buttons
            * @type {Array|String}
            * @default "none"
            */
            this.cfg.addProperty(DEFAULT_CONFIG.BUTTONS.key, {
                handler: this.configButtons,
                value: DEFAULT_CONFIG.BUTTONS.value,
                supercedes : DEFAULT_CONFIG.BUTTONS.supercedes
            }); 

        },

        /**
        * Initializes the custom events for Dialog which are fired 
        * automatically at appropriate times by the Dialog class.
        * @method initEvents
        */
        initEvents: function () {
            Dialog.superclass.initEvents.call(this);

            var SIGNATURE = CustomEvent.LIST;

            /**
            * CustomEvent fired prior to submission
            * @event beforeSubmitEvent
            */ 
            this.beforeSubmitEvent = 
                this.createEvent(EVENT_TYPES.BEFORE_SUBMIT);
            this.beforeSubmitEvent.signature = SIGNATURE;
            
            /**
            * CustomEvent fired after submission
            * @event submitEvent
            */
            this.submitEvent = this.createEvent(EVENT_TYPES.SUBMIT);
            this.submitEvent.signature = SIGNATURE;
        
            /**
            * CustomEvent fired prior to manual submission
            * @event manualSubmitEvent
            */
            this.manualSubmitEvent = 
                this.createEvent(EVENT_TYPES.MANUAL_SUBMIT);
            this.manualSubmitEvent.signature = SIGNATURE;
        
            /**
            * CustomEvent fired prior to asynchronous submission
            * @event asyncSubmitEvent
            */ 
            this.asyncSubmitEvent = this.createEvent(EVENT_TYPES.ASYNC_SUBMIT);
            this.asyncSubmitEvent.signature = SIGNATURE;
        
            /**
            * CustomEvent fired prior to form-based submission
            * @event formSubmitEvent
            */
            this.formSubmitEvent = this.createEvent(EVENT_TYPES.FORM_SUBMIT);
            this.formSubmitEvent.signature = SIGNATURE;
        
            /**
            * CustomEvent fired after cancel
            * @event cancelEvent
            */
            this.cancelEvent = this.createEvent(EVENT_TYPES.CANCEL);
            this.cancelEvent.signature = SIGNATURE;
        
        },
        
        /**
        * The Dialog initialization method, which is executed for Dialog and 
        * all of its subclasses. This method is automatically called by the 
        * constructor, and  sets up all DOM references for pre-existing markup, 
        * and creates required markup if it is not already present.
        * @method init
        * @param {String} el The element ID representing the Dialog <em>OR</em>
        * @param {HTMLElement} el The element representing the Dialog
        * @param {Object} userConfig The configuration object literal 
        * containing the configuration that should be set for this Dialog. 
        * See configuration documentation for more details.
        */
        init: function (el, userConfig) {

            /*
                 Note that we don't pass the user config in here yet because 
                 we only want it executed once, at the lowest subclass level
            */

            Dialog.superclass.init.call(this, el/*, userConfig*/); 

            this.beforeInitEvent.fire(Dialog);

            Dom.addClass(this.element, Dialog.CSS_DIALOG);

            this.cfg.setProperty("visible", false);

            if (userConfig) {
                this.cfg.applyConfig(userConfig, true);
            }

            this.showEvent.subscribe(this.focusFirst, this, true);
            this.beforeHideEvent.subscribe(this.blurButtons, this, true);

            this.subscribe("changeBody", this.registerForm);

            this.initEvent.fire(Dialog);
        },

        /**
        * Submits the Dialog's form depending on the value of the 
        * "postmethod" configuration property.  <strong>Please note:
        * </strong> As of version 2.3 this method will automatically handle 
        * asyncronous file uploads should the Dialog instance's form contain 
        * <code>&#60;input type="file"&#62;</code> elements.  If a Dialog 
        * instance will be handling asyncronous file uploads, its 
        * <code>callback</code> property will need to be setup with a 
        * <code>upload</code> handler rather than the standard 
        * <code>success</code> and, or <code>failure</code> handlers.  For more 
        * information, see the <a href="http://developer.yahoo.com/yui/
        * connection/#file">Connection Manager documenation on file uploads</a>.
        * @method doSubmit
        */
        doSubmit: function () {

            var Connect = YAHOO.util.Connect,
                oForm = this.form,
                bUseFileUpload = false,
                bUseSecureFileUpload = false,
                aElements,
                nElements,
                i,
                formAttrs;

            switch (this.cfg.getProperty("postmethod")) {

                case "async":
                    aElements = oForm.elements;
                    nElements = aElements.length;

                    if (nElements > 0) {
                        i = nElements - 1;
                        do {
                            if (aElements[i].type == "file") {
                                bUseFileUpload = true;
                                break;
                            }
                        }
                        while(i--);
                    }

                    if (bUseFileUpload && YAHOO.env.ua.ie && this.isSecure) {
                        bUseSecureFileUpload = true;
                    }

                    formAttrs = this._getFormAttributes(oForm);

                    Connect.setForm(oForm, bUseFileUpload, bUseSecureFileUpload);
                    Connect.asyncRequest(formAttrs.method, formAttrs.action, this.callback);

                    this.asyncSubmitEvent.fire();

                    break;

                case "form":
                    oForm.submit();
                    this.formSubmitEvent.fire();
                    break;

                case "none":
                case "manual":
                    this.manualSubmitEvent.fire();
                    break;
            }
        },

        /**
         * Retrieves important attributes (currently method and action) from
         * the form element, accounting for any elements which may have the same name 
         * as the attributes. Defaults to "POST" and "" for method and action respectively
         * if the attribute cannot be retrieved.
         *
         * @method _getFormAttributes
         * @protected
         * @param {HTMLFormElement} oForm The HTML Form element from which to retrieve the attributes
         * @return {Object} Object literal, with method and action String properties.
         */
        _getFormAttributes : function(oForm){
            var attrs = {
                method : null,
                action : null
            };

            if (oForm) {
                if (oForm.getAttributeNode) {
                    var action = oForm.getAttributeNode("action");
                    var method = oForm.getAttributeNode("method");

                    if (action) {
                        attrs.action = action.value;
                    }

                    if (method) {
                        attrs.method = method.value;
                    }

                } else {
                    attrs.action = oForm.getAttribute("action");
                    attrs.method = oForm.getAttribute("method");
                }
            }

            attrs.method = (Lang.isString(attrs.method) ? attrs.method : "POST").toUpperCase();
            attrs.action = Lang.isString(attrs.action) ? attrs.action : "";

            return attrs;
        },

        /**
        * Prepares the Dialog's internal FORM object, creating one if one is
        * not currently present.
        * @method registerForm
        */
        registerForm: function() {

            var form = this.element.getElementsByTagName("form")[0];

            if (this.form) {
                if (this.form == form && Dom.isAncestor(this.element, this.form)) {
                    return;
                } else {
                    Event.purgeElement(this.form);
                    this.form = null;
                }
            }

            if (!form) {
                form = document.createElement("form");
                form.name = "frm_" + this.id;
                this.body.appendChild(form);
            }

            if (form) {
                this.form = form;
                Event.on(form, "submit", this._submitHandler, this, true);
            }
        },

        /**
         * Internal handler for the form submit event
         *
         * @method _submitHandler
         * @protected
         * @param {DOMEvent} e The DOM Event object
         */
        _submitHandler : function(e) {
            Event.stopEvent(e);
            this.submit();
            this.form.blur();
        },

        /**
         * Sets up a tab, shift-tab loop between the first and last elements
         * provided. NOTE: Sets up the preventBackTab and preventTabOut KeyListener
         * instance properties, which are reset everytime this method is invoked.
         *
         * @method setTabLoop
         * @param {HTMLElement} firstElement
         * @param {HTMLElement} lastElement
         *
         */
        setTabLoop : function(firstElement, lastElement) {

            firstElement = firstElement || this.firstButton;
            lastElement = this.lastButton || lastElement;

            Dialog.superclass.setTabLoop.call(this, firstElement, lastElement);
        },

        /**
         * Configures instance properties, pointing to the 
         * first and last focusable elements in the Dialog's form.
         *
         * @method setFirstLastFocusable
         */
        setFirstLastFocusable : function() {

            Dialog.superclass.setFirstLastFocusable.call(this);

            var i, l, el, elements = this.focusableElements;

            this.firstFormElement = null;
            this.lastFormElement = null;

            if (this.form && elements && elements.length > 0) {
                l = elements.length;

                for (i = 0; i < l; ++i) {
                    el = elements[i];
                    if (this.form === el.form) {
                        this.firstFormElement = el;
                        break;
                    }
                }

                for (i = l-1; i >= 0; --i) {
                    el = elements[i];
                    if (this.form === el.form) {
                        this.lastFormElement = el;
                        break;
                    }
                }
            }
        },

        // BEGIN BUILT-IN PROPERTY EVENT HANDLERS //
        /**
        * The default event handler fired when the "close" property is 
        * changed. The method controls the appending or hiding of the close
        * icon at the top right of the Dialog.
        * @method configClose
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For 
        * configuration handlers, args[0] will equal the newly applied value 
        * for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configClose: function (type, args, obj) {
            Dialog.superclass.configClose.apply(this, arguments);
        },

        /**
         * Event handler for the close icon
         * 
         * @method _doClose
         * @protected
         * 
         * @param {DOMEvent} e
         */
         _doClose : function(e) {
            Event.preventDefault(e);
            this.cancel();
        },

        /**
        * The default event handler for the "buttons" configuration property
        * @method configButtons
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configButtons: function (type, args, obj) {

            var Button = YAHOO.widget.Button,
                aButtons = args[0],
                oInnerElement = this.innerElement,
                oButton,
                oButtonEl,
                oYUIButton,
                nButtons,
                oSpan,
                oFooter,
                i;

            removeButtonEventHandlers.call(this);

            this._aButtons = null;

            if (Lang.isArray(aButtons)) {

                oSpan = document.createElement("span");
                oSpan.className = "button-group";
                nButtons = aButtons.length;

                this._aButtons = [];
                this.defaultHtmlButton = null;

                for (i = 0; i < nButtons; i++) {
                    oButton = aButtons[i];

                    if (Button) {
                        oYUIButton = new Button({ label: oButton.text});
                        oYUIButton.appendTo(oSpan);

                        oButtonEl = oYUIButton.get("element");

                        if (oButton.isDefault) {
                            oYUIButton.addClass("default");
                            this.defaultHtmlButton = oButtonEl;
                        }

                        if (Lang.isFunction(oButton.handler)) {

                            oYUIButton.set("onclick", { 
                                fn: oButton.handler, 
                                obj: this, 
                                scope: this 
                            });

                        } else if (Lang.isObject(oButton.handler) && Lang.isFunction(oButton.handler.fn)) {

                            oYUIButton.set("onclick", { 
                                fn: oButton.handler.fn, 
                                obj: ((!Lang.isUndefined(oButton.handler.obj)) ? oButton.handler.obj : this), 
                                scope: (oButton.handler.scope || this) 
                            });

                        }

                        this._aButtons[this._aButtons.length] = oYUIButton;

                    } else {

                        oButtonEl = document.createElement("button");
                        oButtonEl.setAttribute("type", "button");

                        if (oButton.isDefault) {
                            oButtonEl.className = "default";
                            this.defaultHtmlButton = oButtonEl;
                        }

                        oButtonEl.innerHTML = oButton.text;

                        if (Lang.isFunction(oButton.handler)) {
                            Event.on(oButtonEl, "click", oButton.handler, this, true);
                        } else if (Lang.isObject(oButton.handler) && 
                            Lang.isFunction(oButton.handler.fn)) {
    
                            Event.on(oButtonEl, "click", 
                                oButton.handler.fn, 
                                ((!Lang.isUndefined(oButton.handler.obj)) ? oButton.handler.obj : this), 
                                (oButton.handler.scope || this));
                        }

                        oSpan.appendChild(oButtonEl);
                        this._aButtons[this._aButtons.length] = oButtonEl;
                    }

                    oButton.htmlButton = oButtonEl;

                    if (i === 0) {
                        this.firstButton = oButtonEl;
                    }

                    if (i == (nButtons - 1)) {
                        this.lastButton = oButtonEl;
                    }
                }

                this.setFooter(oSpan);

                oFooter = this.footer;

                if (Dom.inDocument(this.element) && !Dom.isAncestor(oInnerElement, oFooter)) {
                    oInnerElement.appendChild(oFooter);
                }

                this.buttonSpan = oSpan;

            } else { // Do cleanup
                oSpan = this.buttonSpan;
                oFooter = this.footer;
                if (oSpan && oFooter) {
                    oFooter.removeChild(oSpan);
                    this.buttonSpan = null;
                    this.firstButton = null;
                    this.lastButton = null;
                    this.defaultHtmlButton = null;
                }
            }

            // Everything which needs to be done if content changed
            // TODO: Should we be firing contentChange here?

            this.setFirstLastFocusable();

            this.cfg.refireEvent("iframe");
            this.cfg.refireEvent("underlay");
        },

        /**
        * @method getButtons
        * @description Returns an array containing each of the Dialog's 
        * buttons, by default an array of HTML <code>&#60;BUTTON&#62;</code> 
        * elements.  If the Dialog's buttons were created using the 
        * YAHOO.widget.Button class (via the inclusion of the optional Button 
        * dependancy on the page), an array of YAHOO.widget.Button instances 
        * is returned.
        * @return {Array}
        */
        getButtons: function () {
            return this._aButtons || null;
        },

        /**
        * Sets focus to the first element in the Dialog's form or the first 
        * button defined via the "buttons" configuration property. Called 
        * when the Dialog is made visible.
        * @method focusFirst
        */
        focusFirst: function (type, args, obj) {

            var el = this.firstFormElement;

            if (args && args[1]) {
                Event.stopEvent(args[1]);
            }

            if (el) {
                try {
                    el.focus();
                } catch(oException) {
                    // Ignore
                }
            } else {
                this.focusFirstButton();
            }
        },

        /**
        * Sets focus to the last element in the Dialog's form or the last 
        * button defined via the "buttons" configuration property.
        * @method focusLast
        */
        focusLast: function (type, args, obj) {

            var aButtons = this.cfg.getProperty("buttons"),
                el = this.lastFormElement;

            if (args && args[1]) {
                Event.stopEvent(args[1]);
            }

            if (aButtons && Lang.isArray(aButtons)) {
                this.focusLastButton();
            } else {
                if (el) {
                    try {
                        el.focus();
                    } catch(oException) {
                        // Ignore
                    }
                }
            }
        },

        /**
         * Helper method to normalize button references. It either returns the 
         * YUI Button instance for the given element if found,
         * or the passes back the HTMLElement reference if a corresponding YUI Button
         * reference is not found or YAHOO.widget.Button does not exist on the page.
         *
         * @method _getButton
         * @private
         * @param {HTMLElement} button
         * @return {YAHOO.widget.Button|HTMLElement}
         */
        _getButton : function(button) {
            var Button = YAHOO.widget.Button;

            // If we have an HTML button and YUI Button is on the page, 
            // get the YUI Button reference if available.
            if (Button && button && button.nodeName && button.id) {
                button = Button.getButton(button.id) || button;
            }

            return button;
        },

        /**
        * Sets the focus to the button that is designated as the default via 
        * the "buttons" configuration property. By default, this method is 
        * called when the Dialog is made visible.
        * @method focusDefaultButton
        */
        focusDefaultButton: function () {
            var button = this._getButton(this.defaultHtmlButton);
            if (button) {
                /*
                    Place the call to the "focus" method inside a try/catch
                    block to prevent IE from throwing JavaScript errors if
                    the element is disabled or hidden.
                */
                try {
                    button.focus();
                } catch(oException) {
                }
            }
        },

        /**
        * Blurs all the buttons defined via the "buttons" 
        * configuration property.
        * @method blurButtons
        */
        blurButtons: function () {
            
            var aButtons = this.cfg.getProperty("buttons"),
                nButtons,
                oButton,
                oElement,
                i;

            if (aButtons && Lang.isArray(aButtons)) {
                nButtons = aButtons.length;
                if (nButtons > 0) {
                    i = (nButtons - 1);
                    do {
                        oButton = aButtons[i];
                        if (oButton) {
                            oElement = this._getButton(oButton.htmlButton);
                            if (oElement) {
                                /*
                                    Place the call to the "blur" method inside  
                                    a try/catch block to prevent IE from  
                                    throwing JavaScript errors if the element 
                                    is disabled or hidden.
                                */
                                try {
                                    oElement.blur();
                                } catch(oException) {
                                    // ignore
                                }
                            }
                        }
                    } while(i--);
                }
            }
        },

        /**
        * Sets the focus to the first button created via the "buttons"
        * configuration property.
        * @method focusFirstButton
        */
        focusFirstButton: function () {

            var aButtons = this.cfg.getProperty("buttons"),
                oButton,
                oElement;

            if (aButtons && Lang.isArray(aButtons)) {
                oButton = aButtons[0];
                if (oButton) {
                    oElement = this._getButton(oButton.htmlButton);
                    if (oElement) {
                        /*
                            Place the call to the "focus" method inside a 
                            try/catch block to prevent IE from throwing 
                            JavaScript errors if the element is disabled 
                            or hidden.
                        */
                        try {
                            oElement.focus();
                        } catch(oException) {
                            // ignore
                        }
                    }
                }
            }
        },

        /**
        * Sets the focus to the last button created via the "buttons" 
        * configuration property.
        * @method focusLastButton
        */
        focusLastButton: function () {

            var aButtons = this.cfg.getProperty("buttons"),
                nButtons,
                oButton,
                oElement;

            if (aButtons && Lang.isArray(aButtons)) {
                nButtons = aButtons.length;
                if (nButtons > 0) {
                    oButton = aButtons[(nButtons - 1)];

                    if (oButton) {
                        oElement = this._getButton(oButton.htmlButton);
                        if (oElement) {
                            /*
                                Place the call to the "focus" method inside a 
                                try/catch block to prevent IE from throwing 
                                JavaScript errors if the element is disabled
                                or hidden.
                            */
        
                            try {
                                oElement.focus();
                            } catch(oException) {
                                // Ignore
                            }
                        }
                    }
                }
            }
        },

        /**
        * The default event handler for the "postmethod" configuration property
        * @method configPostMethod
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For 
        * configuration handlers, args[0] will equal the newly applied value 
        * for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configPostMethod: function (type, args, obj) {
            this.registerForm();
        },

        // END BUILT-IN PROPERTY EVENT HANDLERS //
        
        /**
        * Built-in function hook for writing a validation function that will 
        * be checked for a "true" value prior to a submit. This function, as 
        * implemented by default, always returns true, so it should be 
        * overridden if validation is necessary.
        * @method validate
        */
        validate: function () {
            return true;
        },
        
        /**
        * Executes a submit of the Dialog if validation 
        * is successful. By default the Dialog is hidden
        * after submission, but you can set the "hideaftersubmit"
        * configuration property to false, to prevent the Dialog
        * from being hidden.
        * 
        * @method submit
        */
        submit: function () {
            if (this.validate()) {
                this.beforeSubmitEvent.fire();
                this.doSubmit();
                this.submitEvent.fire();

                if (this.cfg.getProperty("hideaftersubmit")) {
                    this.hide();
                }

                return true;
            } else {
                return false;
            }
        },

        /**
        * Executes the cancel of the Dialog followed by a hide.
        * @method cancel
        */
        cancel: function () {
            this.cancelEvent.fire();
            this.hide();
        },
        
        /**
        * Returns a JSON-compatible data structure representing the data 
        * currently contained in the form.
        * @method getData
        * @return {Object} A JSON object reprsenting the data of the 
        * current form.
        */
        getData: function () {

            var oForm = this.form,
                aElements,
                nTotalElements,
                oData,
                sName,
                oElement,
                nElements,
                sType,
                sTagName,
                aOptions,
                nOptions,
                aValues,
                oOption,
                sValue,
                oRadio,
                oCheckbox,
                i,
                n;    
    
            function isFormElement(p_oElement) {
                var sTag = p_oElement.tagName.toUpperCase();
                return ((sTag == "INPUT" || sTag == "TEXTAREA" || 
                        sTag == "SELECT") && p_oElement.name == sName);
            }

            if (oForm) {

                aElements = oForm.elements;
                nTotalElements = aElements.length;
                oData = {};

                for (i = 0; i < nTotalElements; i++) {
                    sName = aElements[i].name;

                    /*
                        Using "Dom.getElementsBy" to safeguard user from JS 
                        errors that result from giving a form field (or set of 
                        fields) the same name as a native method of a form 
                        (like "submit") or a DOM collection (such as the "item"
                        method). Originally tried accessing fields via the 
                        "namedItem" method of the "element" collection, but 
                        discovered that it won't return a collection of fields 
                        in Gecko.
                    */

                    oElement = Dom.getElementsBy(isFormElement, "*", oForm);
                    nElements = oElement.length;

                    if (nElements > 0) {
                        if (nElements == 1) {
                            oElement = oElement[0];

                            sType = oElement.type;
                            sTagName = oElement.tagName.toUpperCase();

                            switch (sTagName) {
                                case "INPUT":
                                    if (sType == "checkbox") {
                                        oData[sName] = oElement.checked;
                                    } else if (sType != "radio") {
                                        oData[sName] = oElement.value;
                                    }
                                    break;

                                case "TEXTAREA":
                                    oData[sName] = oElement.value;
                                    break;
    
                                case "SELECT":
                                    aOptions = oElement.options;
                                    nOptions = aOptions.length;
                                    aValues = [];
    
                                    for (n = 0; n < nOptions; n++) {
                                        oOption = aOptions[n];
    
                                        if (oOption.selected) {
                                            sValue = oOption.value;
                                            if (!sValue || sValue === "") {
                                                sValue = oOption.text;
                                            }
                                            aValues[aValues.length] = sValue;
                                        }
                                    }
                                    oData[sName] = aValues;
                                    break;
                            }
        
                        } else {
                            sType = oElement[0].type;
                            switch (sType) {
                                case "radio":
                                    for (n = 0; n < nElements; n++) {
                                        oRadio = oElement[n];
                                        if (oRadio.checked) {
                                            oData[sName] = oRadio.value;
                                            break;
                                        }
                                    }
                                    break;
        
                                case "checkbox":
                                    aValues = [];
                                    for (n = 0; n < nElements; n++) {
                                        oCheckbox = oElement[n];
                                        if (oCheckbox.checked) {
                                            aValues[aValues.length] =  oCheckbox.value;
                                        }
                                    }
                                    oData[sName] = aValues;
                                    break;
                            }
                        }
                    }
                }
            }

            return oData;
        },

        /**
        * Removes the Panel element from the DOM and sets all child elements 
        * to null.
        * @method destroy
        */
        destroy: function () {
            removeButtonEventHandlers.call(this);

            this._aButtons = null;

            var aForms = this.element.getElementsByTagName("form"),
                oForm;

            if (aForms.length > 0) {
                oForm = aForms[0];

                if (oForm) {
                    Event.purgeElement(oForm);
                    if (oForm.parentNode) {
                        oForm.parentNode.removeChild(oForm);
                    }
                    this.form = null;
                }
            }
            Dialog.superclass.destroy.call(this);
        },

        /**
        * Returns a string representation of the object.
        * @method toString
        * @return {String} The string representation of the Dialog
        */
        toString: function () {
            return "Dialog " + this.id;
        }
    
    });

}());

(function () {

    /**
    * SimpleDialog is a simple implementation of Dialog that can be used to 
    * submit a single value. Forms can be processed in 3 ways -- via an 
    * asynchronous Connection utility call, a simple form POST or GET, 
    * or manually.
    * @namespace YAHOO.widget
    * @class SimpleDialog
    * @extends YAHOO.widget.Dialog
    * @constructor
    * @param {String} el The element ID representing the SimpleDialog 
    * <em>OR</em>
    * @param {HTMLElement} el The element representing the SimpleDialog
    * @param {Object} userConfig The configuration object literal containing 
    * the configuration that should be set for this SimpleDialog. See 
    * configuration documentation for more details.
    */
    YAHOO.widget.SimpleDialog = function (el, userConfig) {
    
        YAHOO.widget.SimpleDialog.superclass.constructor.call(this, 
            el, userConfig);
    
    };

    var Dom = YAHOO.util.Dom,
        SimpleDialog = YAHOO.widget.SimpleDialog,
    
        /**
        * Constant representing the SimpleDialog's configuration properties
        * @property DEFAULT_CONFIG
        * @private
        * @final
        * @type Object
        */
        DEFAULT_CONFIG = {
        
            "ICON": { 
                key: "icon", 
                value: "none", 
                suppressEvent: true  
            },
        
            "TEXT": { 
                key: "text", 
                value: "", 
                suppressEvent: true, 
                supercedes: ["icon"] 
            }
        
        };

    /**
    * Constant for the standard network icon for a blocking action
    * @property YAHOO.widget.SimpleDialog.ICON_BLOCK
    * @static
    * @final
    * @type String
    */
    SimpleDialog.ICON_BLOCK = "blckicon";
    
    /**
    * Constant for the standard network icon for alarm
    * @property YAHOO.widget.SimpleDialog.ICON_ALARM
    * @static
    * @final
    * @type String
    */
    SimpleDialog.ICON_ALARM = "alrticon";
    
    /**
    * Constant for the standard network icon for help
    * @property YAHOO.widget.SimpleDialog.ICON_HELP
    * @static
    * @final
    * @type String
    */
    SimpleDialog.ICON_HELP  = "hlpicon";
    
    /**
    * Constant for the standard network icon for info
    * @property YAHOO.widget.SimpleDialog.ICON_INFO
    * @static
    * @final
    * @type String
    */
    SimpleDialog.ICON_INFO  = "infoicon";
    
    /**
    * Constant for the standard network icon for warn
    * @property YAHOO.widget.SimpleDialog.ICON_WARN
    * @static
    * @final
    * @type String
    */
    SimpleDialog.ICON_WARN  = "warnicon";
    
    /**
    * Constant for the standard network icon for a tip
    * @property YAHOO.widget.SimpleDialog.ICON_TIP
    * @static
    * @final
    * @type String
    */
    SimpleDialog.ICON_TIP   = "tipicon";

    /**
    * Constant representing the name of the CSS class applied to the element 
    * created by the "icon" configuration property.
    * @property YAHOO.widget.SimpleDialog.ICON_CSS_CLASSNAME
    * @static
    * @final
    * @type String
    */
    SimpleDialog.ICON_CSS_CLASSNAME = "yui-icon";
    
    /**
    * Constant representing the default CSS class used for a SimpleDialog
    * @property YAHOO.widget.SimpleDialog.CSS_SIMPLEDIALOG
    * @static
    * @final
    * @type String
    */
    SimpleDialog.CSS_SIMPLEDIALOG = "yui-simple-dialog";

    
    YAHOO.extend(SimpleDialog, YAHOO.widget.Dialog, {
    
        /**
        * Initializes the class's configurable properties which can be changed 
        * using the SimpleDialog's Config object (cfg).
        * @method initDefaultConfig
        */
        initDefaultConfig: function () {
        
            SimpleDialog.superclass.initDefaultConfig.call(this);
        
            // Add dialog config properties //
        
            /**
            * Sets the informational icon for the SimpleDialog
            * @config icon
            * @type String
            * @default "none"
            */
            this.cfg.addProperty(DEFAULT_CONFIG.ICON.key, {
                handler: this.configIcon,
                value: DEFAULT_CONFIG.ICON.value,
                suppressEvent: DEFAULT_CONFIG.ICON.suppressEvent
            });
        
            /**
            * Sets the text for the SimpleDialog
            * @config text
            * @type String
            * @default ""
            */
            this.cfg.addProperty(DEFAULT_CONFIG.TEXT.key, { 
                handler: this.configText, 
                value: DEFAULT_CONFIG.TEXT.value, 
                suppressEvent: DEFAULT_CONFIG.TEXT.suppressEvent, 
                supercedes: DEFAULT_CONFIG.TEXT.supercedes 
            });
        
        },
        
        
        /**
        * The SimpleDialog initialization method, which is executed for 
        * SimpleDialog and all of its subclasses. This method is automatically 
        * called by the constructor, and  sets up all DOM references for 
        * pre-existing markup, and creates required markup if it is not 
        * already present.
        * @method init
        * @param {String} el The element ID representing the SimpleDialog 
        * <em>OR</em>
        * @param {HTMLElement} el The element representing the SimpleDialog
        * @param {Object} userConfig The configuration object literal 
        * containing the configuration that should be set for this 
        * SimpleDialog. See configuration documentation for more details.
        */
        init: function (el, userConfig) {

            /*
                Note that we don't pass the user config in here yet because we 
                only want it executed once, at the lowest subclass level
            */

            SimpleDialog.superclass.init.call(this, el/*, userConfig*/);
        
            this.beforeInitEvent.fire(SimpleDialog);
        
            Dom.addClass(this.element, SimpleDialog.CSS_SIMPLEDIALOG);
        
            this.cfg.queueProperty("postmethod", "manual");
        
            if (userConfig) {
                this.cfg.applyConfig(userConfig, true);
            }
        
            this.beforeRenderEvent.subscribe(function () {
                if (! this.body) {
                    this.setBody("");
                }
            }, this, true);
        
            this.initEvent.fire(SimpleDialog);
        
        },
        
        /**
        * Prepares the SimpleDialog's internal FORM object, creating one if one 
        * is not currently present, and adding the value hidden field.
        * @method registerForm
        */
        registerForm: function () {

            SimpleDialog.superclass.registerForm.call(this);

            this.form.innerHTML += "<input type=\"hidden\" name=\"" + 
                this.id + "\" value=\"\"/>";

        },
        
        // BEGIN BUILT-IN PROPERTY EVENT HANDLERS //
        
        /**
        * Fired when the "icon" property is set.
        * @method configIcon
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configIcon: function (type,args,obj) {
        
            var sIcon = args[0],
                oBody = this.body,
                sCSSClass = SimpleDialog.ICON_CSS_CLASSNAME,
                oIcon,
                oIconParent;
        
            if (sIcon && sIcon != "none") {

                oIcon = Dom.getElementsByClassName(sCSSClass, "*" , oBody);

                if (oIcon) {

                    oIconParent = oIcon.parentNode;
                    
                    if (oIconParent) {
                    
                        oIconParent.removeChild(oIcon);
                        
                        oIcon = null;
                    
                    }

                }


                if (sIcon.indexOf(".") == -1) {

                    oIcon = document.createElement("span");
                    oIcon.className = (sCSSClass + " " + sIcon);
                    oIcon.innerHTML = "&#160;";

                } else {

                    oIcon = document.createElement("img");
                    oIcon.src = (this.imageRoot + sIcon);
                    oIcon.className = sCSSClass;

                }
                

                if (oIcon) {
                
                    oBody.insertBefore(oIcon, oBody.firstChild);
                
                }

            }

        },

        /**
        * Fired when the "text" property is set.
        * @method configText
        * @param {String} type The CustomEvent type (usually the property name)
        * @param {Object[]} args The CustomEvent arguments. For configuration 
        * handlers, args[0] will equal the newly applied value for the property.
        * @param {Object} obj The scope object. For configuration handlers, 
        * this will usually equal the owner.
        */
        configText: function (type,args,obj) {
            var text = args[0];
            if (text) {
                this.setBody(text);
                this.cfg.refireEvent("icon");
            }
        },
        
        // END BUILT-IN PROPERTY EVENT HANDLERS //
        
        /**
        * Returns a string representation of the object.
        * @method toString
        * @return {String} The string representation of the SimpleDialog
        */
        toString: function () {
            return "SimpleDialog " + this.id;
        }

        /**
        * <p>
        * Sets the SimpleDialog's body content to the HTML specified. 
        * If no body is present, one will be automatically created. 
        * An empty string can be passed to the method to clear the contents of the body.
        * </p>
        * <p><strong>NOTE:</strong> SimpleDialog provides the <a href="#config_text">text</a>
        * and <a href="#config_icon">icon</a> configuration properties to set the contents
        * of it's body element in accordance with the UI design for a SimpleDialog (an 
        * icon and message text). Calling setBody on the SimpleDialog will not enforce this 
        * UI design constraint and will replace the entire contents of the SimpleDialog body. 
        * It should only be used if you wish the replace the default icon/text body structure 
        * of a SimpleDialog with your own custom markup.</p>
        * 
        * @method setBody
        * @param {String} bodyContent The HTML used to set the body. 
        * As a convenience, non HTMLElement objects can also be passed into 
        * the method, and will be treated as strings, with the body innerHTML
        * set to their default toString implementations.
        * <em>OR</em>
        * @param {HTMLElement} bodyContent The HTMLElement to add as the first and only child of the body element.
        * <em>OR</em>
        * @param {DocumentFragment} bodyContent The document fragment 
        * containing elements which are to be added to the body
        */
    });

}());

(function () {

    /**
    * ContainerEffect encapsulates animation transitions that are executed when 
    * an Overlay is shown or hidden.
    * @namespace YAHOO.widget
    * @class ContainerEffect
    * @constructor
    * @param {YAHOO.widget.Overlay} overlay The Overlay that the animation 
    * should be associated with
    * @param {Object} attrIn The object literal representing the animation 
    * arguments to be used for the animate-in transition. The arguments for 
    * this literal are: attributes(object, see YAHOO.util.Anim for description), 
    * duration(Number), and method(i.e. Easing.easeIn).
    * @param {Object} attrOut The object literal representing the animation 
    * arguments to be used for the animate-out transition. The arguments for  
    * this literal are: attributes(object, see YAHOO.util.Anim for description), 
    * duration(Number), and method(i.e. Easing.easeIn).
    * @param {HTMLElement} targetElement Optional. The target element that  
    * should be animated during the transition. Defaults to overlay.element.
    * @param {class} Optional. The animation class to instantiate. Defaults to 
    * YAHOO.util.Anim. Other options include YAHOO.util.Motion.
    */
    YAHOO.widget.ContainerEffect = function (overlay, attrIn, attrOut, targetElement, animClass) {

        if (!animClass) {
            animClass = YAHOO.util.Anim;
        }

        /**
        * The overlay to animate
        * @property overlay
        * @type YAHOO.widget.Overlay
        */
        this.overlay = overlay;
    
        /**
        * The animation attributes to use when transitioning into view
        * @property attrIn
        * @type Object
        */
        this.attrIn = attrIn;
    
        /**
        * The animation attributes to use when transitioning out of view
        * @property attrOut
        * @type Object
        */
        this.attrOut = attrOut;
    
        /**
        * The target element to be animated
        * @property targetElement
        * @type HTMLElement
        */
        this.targetElement = targetElement || overlay.element;
    
        /**
        * The animation class to use for animating the overlay
        * @property animClass
        * @type class
        */
        this.animClass = animClass;
    
    };


    var Dom = YAHOO.util.Dom,
        CustomEvent = YAHOO.util.CustomEvent,
        ContainerEffect = YAHOO.widget.ContainerEffect;


    /**
    * A pre-configured ContainerEffect instance that can be used for fading 
    * an overlay in and out.
    * @method FADE
    * @static
    * @param {YAHOO.widget.Overlay} overlay The Overlay object to animate
    * @param {Number} dur The duration of the animation
    * @return {YAHOO.widget.ContainerEffect} The configured ContainerEffect object
    */
    ContainerEffect.FADE = function (overlay, dur) {

        var Easing = YAHOO.util.Easing,
            fin = {
                attributes: {opacity:{from:0, to:1}},
                duration: dur,
                method: Easing.easeIn
            },
            fout = {
                attributes: {opacity:{to:0}},
                duration: dur,
                method: Easing.easeOut
            },
            fade = new ContainerEffect(overlay, fin, fout, overlay.element);

        fade.handleUnderlayStart = function() {
            var underlay = this.overlay.underlay;
            if (underlay && YAHOO.env.ua.ie) {
                var hasFilters = (underlay.filters && underlay.filters.length > 0);
                if(hasFilters) {
                    Dom.addClass(overlay.element, "yui-effect-fade");
                }
            }
        };

        fade.handleUnderlayComplete = function() {
            var underlay = this.overlay.underlay;
            if (underlay && YAHOO.env.ua.ie) {
                Dom.removeClass(overlay.element, "yui-effect-fade");
            }
        };

        fade.handleStartAnimateIn = function (type, args, obj) {
            Dom.addClass(obj.overlay.element, "hide-select");

            if (!obj.overlay.underlay) {
                obj.overlay.cfg.refireEvent("underlay");
            }

            obj.handleUnderlayStart();

            Dom.setStyle(obj.overlay.element, "visibility", "visible");
            Dom.setStyle(obj.overlay.element, "opacity", 0);
        };

        fade.handleCompleteAnimateIn = function (type,args,obj) {
            Dom.removeClass(obj.overlay.element, "hide-select");

            if (obj.overlay.element.style.filter) {
                obj.overlay.element.style.filter = null;
            }

            obj.handleUnderlayComplete();

            obj.overlay.cfg.refireEvent("iframe");
            obj.animateInCompleteEvent.fire();
        };

        fade.handleStartAnimateOut = function (type, args, obj) {
            Dom.addClass(obj.overlay.element, "hide-select");
            obj.handleUnderlayStart();
        };

        fade.handleCompleteAnimateOut =  function (type, args, obj) {
            Dom.removeClass(obj.overlay.element, "hide-select");
            if (obj.overlay.element.style.filter) {
                obj.overlay.element.style.filter = null;
            }
            Dom.setStyle(obj.overlay.element, "visibility", "hidden");
            Dom.setStyle(obj.overlay.element, "opacity", 1);

            obj.handleUnderlayComplete();

            obj.overlay.cfg.refireEvent("iframe");
            obj.animateOutCompleteEvent.fire();
        };

        fade.init();
        return fade;
    };
    
    
    /**
    * A pre-configured ContainerEffect instance that can be used for sliding an 
    * overlay in and out.
    * @method SLIDE
    * @static
    * @param {YAHOO.widget.Overlay} overlay The Overlay object to animate
    * @param {Number} dur The duration of the animation
    * @return {YAHOO.widget.ContainerEffect} The configured ContainerEffect object
    */
    ContainerEffect.SLIDE = function (overlay, dur) {
        var Easing = YAHOO.util.Easing,

            x = overlay.cfg.getProperty("x") || Dom.getX(overlay.element),
            y = overlay.cfg.getProperty("y") || Dom.getY(overlay.element),
            clientWidth = Dom.getClientWidth(),
            offsetWidth = overlay.element.offsetWidth,

            sin =  { 
                attributes: { points: { to: [x, y] } },
                duration: dur,
                method: Easing.easeIn 
            },

            sout = {
                attributes: { points: { to: [(clientWidth + 25), y] } },
                duration: dur,
                method: Easing.easeOut 
            },

            slide = new ContainerEffect(overlay, sin, sout, overlay.element, YAHOO.util.Motion);

        slide.handleStartAnimateIn = function (type,args,obj) {
            obj.overlay.element.style.left = ((-25) - offsetWidth) + "px";
            obj.overlay.element.style.top  = y + "px";
        };

        slide.handleTweenAnimateIn = function (type, args, obj) {
        
            var pos = Dom.getXY(obj.overlay.element),
                currentX = pos[0],
                currentY = pos[1];
        
            if (Dom.getStyle(obj.overlay.element, "visibility") == 
                "hidden" && currentX < x) {

                Dom.setStyle(obj.overlay.element, "visibility", "visible");

            }
        
            obj.overlay.cfg.setProperty("xy", [currentX, currentY], true);
            obj.overlay.cfg.refireEvent("iframe");
        };
        
        slide.handleCompleteAnimateIn = function (type, args, obj) {
            obj.overlay.cfg.setProperty("xy", [x, y], true);
            obj.startX = x;
            obj.startY = y;
            obj.overlay.cfg.refireEvent("iframe");
            obj.animateInCompleteEvent.fire();
        };
        
        slide.handleStartAnimateOut = function (type, args, obj) {
    
            var vw = Dom.getViewportWidth(),
                pos = Dom.getXY(obj.overlay.element),
                yso = pos[1];
    
            obj.animOut.attributes.points.to = [(vw + 25), yso];
        };
        
        slide.handleTweenAnimateOut = function (type, args, obj) {
    
            var pos = Dom.getXY(obj.overlay.element),
                xto = pos[0],
                yto = pos[1];
        
            obj.overlay.cfg.setProperty("xy", [xto, yto], true);
            obj.overlay.cfg.refireEvent("iframe");
        };
        
        slide.handleCompleteAnimateOut = function (type, args, obj) {
            Dom.setStyle(obj.overlay.element, "visibility", "hidden");
        
            obj.overlay.cfg.setProperty("xy", [x, y]);
            obj.animateOutCompleteEvent.fire();
        };

        slide.init();
        return slide;
    };

    ContainerEffect.prototype = {

        /**
        * Initializes the animation classes and events.
        * @method init
        */
        init: function () {

            this.beforeAnimateInEvent = this.createEvent("beforeAnimateIn");
            this.beforeAnimateInEvent.signature = CustomEvent.LIST;
            
            this.beforeAnimateOutEvent = this.createEvent("beforeAnimateOut");
            this.beforeAnimateOutEvent.signature = CustomEvent.LIST;
        
            this.animateInCompleteEvent = this.createEvent("animateInComplete");
            this.animateInCompleteEvent.signature = CustomEvent.LIST;
        
            this.animateOutCompleteEvent = 
                this.createEvent("animateOutComplete");
            this.animateOutCompleteEvent.signature = CustomEvent.LIST;
        
            this.animIn = new this.animClass(this.targetElement, 
                this.attrIn.attributes, this.attrIn.duration, 
                this.attrIn.method);

            this.animIn.onStart.subscribe(this.handleStartAnimateIn, this);
            this.animIn.onTween.subscribe(this.handleTweenAnimateIn, this);

            this.animIn.onComplete.subscribe(this.handleCompleteAnimateIn, 
                this);
        
            this.animOut = new this.animClass(this.targetElement, 
                this.attrOut.attributes, this.attrOut.duration, 
                this.attrOut.method);

            this.animOut.onStart.subscribe(this.handleStartAnimateOut, this);
            this.animOut.onTween.subscribe(this.handleTweenAnimateOut, this);
            this.animOut.onComplete.subscribe(this.handleCompleteAnimateOut, 
                this);

        },
        
        /**
        * Triggers the in-animation.
        * @method animateIn
        */
        animateIn: function () {
            this.beforeAnimateInEvent.fire();
            this.animIn.animate();
        },

        /**
        * Triggers the out-animation.
        * @method animateOut
        */
        animateOut: function () {
            this.beforeAnimateOutEvent.fire();
            this.animOut.animate();
        },

        /**
        * The default onStart handler for the in-animation.
        * @method handleStartAnimateIn
        * @param {String} type The CustomEvent type
        * @param {Object[]} args The CustomEvent arguments
        * @param {Object} obj The scope object
        */
        handleStartAnimateIn: function (type, args, obj) { },

        /**
        * The default onTween handler for the in-animation.
        * @method handleTweenAnimateIn
        * @param {String} type The CustomEvent type
        * @param {Object[]} args The CustomEvent arguments
        * @param {Object} obj The scope object
        */
        handleTweenAnimateIn: function (type, args, obj) { },

        /**
        * The default onComplete handler for the in-animation.
        * @method handleCompleteAnimateIn
        * @param {String} type The CustomEvent type
        * @param {Object[]} args The CustomEvent arguments
        * @param {Object} obj The scope object
        */
        handleCompleteAnimateIn: function (type, args, obj) { },

        /**
        * The default onStart handler for the out-animation.
        * @method handleStartAnimateOut
        * @param {String} type The CustomEvent type
        * @param {Object[]} args The CustomEvent arguments
        * @param {Object} obj The scope object
        */
        handleStartAnimateOut: function (type, args, obj) { },

        /**
        * The default onTween handler for the out-animation.
        * @method handleTweenAnimateOut
        * @param {String} type The CustomEvent type
        * @param {Object[]} args The CustomEvent arguments
        * @param {Object} obj The scope object
        */
        handleTweenAnimateOut: function (type, args, obj) { },

        /**
        * The default onComplete handler for the out-animation.
        * @method handleCompleteAnimateOut
        * @param {String} type The CustomEvent type
        * @param {Object[]} args The CustomEvent arguments
        * @param {Object} obj The scope object
        */
        handleCompleteAnimateOut: function (type, args, obj) { },
        
        /**
        * Returns a string representation of the object.
        * @method toString
        * @return {String} The string representation of the ContainerEffect
        */
        toString: function () {
            var output = "ContainerEffect";
            if (this.overlay) {
                output += " [" + this.overlay.toString() + "]";
            }
            return output;
        }
    };

    YAHOO.lang.augmentProto(ContainerEffect, YAHOO.util.EventProvider);

})();

YAHOO.register("container", YAHOO.widget.Module, {version: "2.6.0", build: "1321"});
/*
Copyright (c) 2008, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.6.0
*/
/**
 * Provides methods to parse JSON strings and convert objects to JSON strings.
 * @module json
 * @class JSON
 * @static
 */
YAHOO.lang.JSON = (function () {

var l = YAHOO.lang,

    /**
     * Replace certain Unicode characters that JavaScript may handle incorrectly
     * during eval--either by deleting them or treating them as line
     * endings--with escape sequences.
     * IMPORTANT NOTE: This regex will be used to modify the input if a match is
     * found.
     * @property _UNICODE_EXCEPTIONS
     * @type {RegExp}
     * @private
     */
    _UNICODE_EXCEPTIONS = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,

    /**
     * First step in the validation.  Regex used to replace all escape
     * sequences (i.e. "\\", etc) with '@' characters (a non-JSON character).
     * @property _ESCAPES
     * @type {RegExp}
     * @static
     * @private
     */
    _ESCAPES = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,

    /**
     * Second step in the validation.  Regex used to replace all simple
     * values with ']' characters.
     * @property _VALUES
     * @type {RegExp}
     * @static
     * @private
     */
    _VALUES  = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,

    /**
     * Third step in the validation.  Regex used to remove all open square
     * brackets following a colon, comma, or at the beginning of the string.
     * @property _BRACKETS
     * @type {RegExp}
     * @static
     * @private
     */
    _BRACKETS = /(?:^|:|,)(?:\s*\[)+/g,

    /**
     * Final step in the validation.  Regex used to test the string left after
     * all previous replacements for invalid characters.
     * @property _INVALID
     * @type {RegExp}
     * @static
     * @private
     */
    _INVALID  = /^[\],:{}\s]*$/,

    /**
     * Regex used to replace special characters in strings for JSON
     * stringification.
     * @property _SPECIAL_CHARS
     * @type {RegExp}
     * @static
     * @private
     */
    _SPECIAL_CHARS = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,

    /**
     * Character substitution map for common escapes and special characters.
     * @property _CHARS
     * @type {Object}
     * @static
     * @private
     */
    _CHARS = {
        '\b': '\\b',
        '\t': '\\t',
        '\n': '\\n',
        '\f': '\\f',
        '\r': '\\r',
        '"' : '\\"',
        '\\': '\\\\'
    };

/**
 * Traverses nested objects, applying a filter or reviver function to
 * each value.  The value returned from the function will replace the
 * original value in the key:value pair.  If the value returned is
 * undefined, the key will be omitted from the returned object.
 * @method _revive
 * @param data {MIXED} Any JavaScript data
 * @param reviver {Function} filter or mutation function
 * @return {MIXED} The results of the filtered/mutated data structure
 * @private
 */
function _revive(data, reviver) {
    var walk = function (o,key) {
        var k,v,value = o[key];
        if (value && typeof value === 'object') {
            for (k in value) {
                if (l.hasOwnProperty(value,k)) {
                    v = walk(value, k);
                    if (v === undefined) {
                        delete value[k];
                    } else {
                        value[k] = v;
                    }
                }
            }
        }
        return reviver.call(o,key,value);
    };

    return typeof reviver === 'function' ? walk({'':data},'') : data;
}

/**
 * Escapes a special character to a safe Unicode representation
 * @method _char
 * @param c {String} single character to escape
 * @return {String} safe Unicode escape
 */
function _char(c) {
    if (!_CHARS[c]) {
        _CHARS[c] =  '\\u'+('0000'+(+(c.charCodeAt(0))).toString(16)).slice(-4);
    }
    return _CHARS[c];
}

/**
 * Replace certain Unicode characters that may be handled incorrectly by
 * some browser implementations.
 * @method _prepare
 * @param s {String} parse input
 * @return {String} sanitized JSON string ready to be validated/parsed
 * @private
 */
function _prepare(s) {
    return s.replace(_UNICODE_EXCEPTIONS, _char);
}

/**
 * Four step determination whether a string is valid JSON.  In three steps,
 * escape sequences, safe values, and properly placed open square brackets
 * are replaced with placeholders or removed.  Then in the final step, the
 * result of all these replacements is checked for invalid characters.
 * @method _isValid
 * @param str {String} JSON string to be tested
 * @return {boolean} is the string safe for eval?
 * @static
 */
function _isValid(str) {
    return l.isString(str) &&
            _INVALID.test(str.
            replace(_ESCAPES,'@').
            replace(_VALUES,']').
            replace(_BRACKETS,''));
}

/**
 * Enclose escaped strings in quotes
 * @method _string
 * @param s {String} string to wrap
 * @return {String} '"'+s+'"' after s has had special characters escaped
 * @private
 */
function _string(s) {
    return '"' + s.replace(_SPECIAL_CHARS, _char) + '"';
}

/**
 * Worker function used by public stringify.
 * @method _stringify
 * @param h {Object} object holding the key
 * @param key {String} String key in object h to serialize
 * @param depth {Number} depth to serialize
 * @param w {Array|Function} array of whitelisted keys OR replacer function
 * @param pstack {Array} used to protect against recursion
 * @return {String} serialized version of o
 */
function _stringify(h,key,d,w,pstack) {
    var o = typeof w === 'function' ? w.call(h,key,h[key]) : h[key],
        i,len,j, // array iteration
        k,v,     // object iteration
        isArray, // forking in typeof 'object'
        a;       // composition array for performance over string concat

    if (o instanceof Date) {
        o = l.JSON.dateToString(o);
    } else if (o instanceof String || o instanceof Boolean || o instanceof Number) {
        o = o.valueOf();
    }

    switch (typeof o) {
        case 'string' : return _string(o);
        case 'number' : return isFinite(o) ? String(o) : 'null';
        case 'boolean': return String(o);
        case 'object' :
            // null
            if (o === null) {
                return 'null';
            }

            // Check for cyclical references
            for (i = pstack.length - 1; i >= 0; --i) {
                if (pstack[i] === o) {
                    return 'null';
                }
            }

            // Add the object to the processing stack
            pstack[pstack.length] = o;

            a = [];
            isArray = l.isArray(o);

            // Only recurse if we're above depth config
            if (d > 0) {
                // Array
                if (isArray) {
                    for (i = o.length - 1; i >= 0; --i) {
                        a[i] = _stringify(o,i,d-1,w,pstack) || 'null';
                    }

                // Object
                } else {
                    j = 0;
                    // Use whitelist keys if provided as an array
                    if (l.isArray(w)) {
                        for (i = 0, len = w.length; i < len; ++i) {
                            k = w[i];
                            v = _stringify(o,k,d-1,w,pstack);
                            if (v) {
                                a[j++] = _string(k) + ':' + v;
                            }
                        }
                    } else {
                        for (k in o) {
                            if (typeof k === 'string' && l.hasOwnProperty(o,k)) {
                                v = _stringify(o,k,d-1,w,pstack);
                                if (v) {
                                    a[j++] = _string(k) + ':' + v;
                                }
                            }
                        }
                    }

                    // sort object keys for easier readability
                    a.sort();
                }
            }

            // remove the object from the stack
            pstack.pop();

            return isArray ? '['+a.join(',')+']' : '{'+a.join(',')+'}';
    }

    return undefined; // invalid input
}

// Return the public API
return {
    /**
     * Four step determination whether a string is valid JSON.  In three steps,
     * escape sequences, safe values, and properly placed open square brackets
     * are replaced with placeholders or removed.  Then in the final step, the
     * result of all these replacements is checked for invalid characters.
     * @method isValid
     * @param str {String} JSON string to be tested
     * @return {boolean} is the string safe for eval?
     * @static
     */
    isValid : function (s) {
        return _isValid(_prepare(s));
    },

    /**
     * Parse a JSON string, returning the native JavaScript representation.
     * Only minor modifications from http://www.json.org/json2.js.
     * @param s {string} JSON string data
     * @param reviver {function} (optional) function(k,v) passed each key:value
     *          pair of object literals, allowing pruning or altering values
     * @return {MIXED} the native JavaScript representation of the JSON string
     * @throws SyntaxError
     * @method parse
     * @static
     */
    parse : function (s,reviver) {
        // sanitize
        s = _prepare(s);

        // Ensure valid JSON
        if (_isValid(s)) {
            // Eval the text into a JavaScript data structure, apply the
            // reviver function if provided, and return
            return _revive( eval('(' + s + ')'), reviver );
        }

        // The text is not valid JSON
        throw new SyntaxError('parseJSON');
    },

    /**
     * Converts an arbitrary value to a JSON string representation.
     * Cyclical object or array references are replaced with null.
     * If a whitelist is provided, only matching object keys will be included.
     * If a depth limit is provided, objects and arrays at that depth will
     * be stringified as empty.
     * @method stringify
     * @param o {MIXED} any arbitrary object to convert to JSON string
     * @param w {Array|Function} (optional) whitelist of acceptable object keys to include OR a function(value,key) to alter values before serialization
     * @param d {number} (optional) depth limit to recurse objects/arrays (practical minimum 1)
     * @return {string} JSON string representation of the input
     * @static
     */
    stringify : function (o,w,d) {
        if (o !== undefined) {
            // Ensure whitelist keys are unique (bug 2110391)
            if (l.isArray(w)) {
                w = (function (a) {
                    var uniq=[],map={},v,i,j,len;
                    for (i=0,j=0,len=a.length; i<len; ++i) {
                        v = a[i];
                        if (typeof v === 'string' && map[v] === undefined) {
                            uniq[(map[v] = j++)] = v;
                        }
                    }
                    return uniq;
                })(w);
            }

            // Default depth to POSITIVE_INFINITY
            d = d >= 0 ? d : 1/0;

            // process the input
            return _stringify({'':o},'',d,w,[]);
        }

        return undefined;
    },

    /**
     * Serializes a Date instance as a UTC date string.  Used internally by
     * stringify.  Override this method if you need Dates serialized in a
     * different format.
     * @method dateToString
     * @param d {Date} The Date to serialize
     * @return {String} stringified Date in UTC format YYYY-MM-DDTHH:mm:SSZ
     * @static
     */
    dateToString : function (d) {
        function _zeroPad(v) {
            return v < 10 ? '0' + v : v;
        }

        return d.getUTCFullYear()         + '-' +
            _zeroPad(d.getUTCMonth() + 1) + '-' +
            _zeroPad(d.getUTCDate())      + 'T' +
            _zeroPad(d.getUTCHours())     + ':' +
            _zeroPad(d.getUTCMinutes())   + ':' +
            _zeroPad(d.getUTCSeconds())   + 'Z';
    },

    /**
     * Reconstitute Date instances from the default JSON UTC serialization.
     * Reference this from a reviver function to rebuild Dates during the
     * parse operation.
     * @method stringToDate
     * @param str {String} String serialization of a Date
     * @return {Date}
     */
    stringToDate : function (str) {
        if (/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})Z$/.test(str)) {
            var d = new Date();
            d.setUTCFullYear(RegExp.$1, (RegExp.$2|0)-1, RegExp.$3);
            d.setUTCHours(RegExp.$4, RegExp.$5, RegExp.$6);
            return d;
        }
        return str;
    }
};

})();
YAHOO.register("json", YAHOO.lang.JSON, {version: "2.6.0", build: "1321"});
/*  Prototype JavaScript framework, version 1.6.0.2
 *  (c) 2005-2008 Sam Stephenson
 *
 *  Prototype is freely distributable under the terms of an MIT-style license.
 *  For details, see the Prototype web site: http://www.prototypejs.org/
 *
 *--------------------------------------------------------------------------*/

var Prototype = {
  Version: '1.6.0.2',

  Browser: {
    IE:     !!(window.attachEvent && !window.opera),
    Opera:  !!window.opera,
    WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
    Gecko:  navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1,
    MobileSafari: !!navigator.userAgent.match(/Apple.*Mobile.*Safari/)
  },

  BrowserFeatures: {
    XPath: !!document.evaluate,
    ElementExtensions: !!window.HTMLElement,
    SpecificElementExtensions:
      document.createElement('div').__proto__ &&
      document.createElement('div').__proto__ !==
        document.createElement('form').__proto__
  },

  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
  JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,

  emptyFunction: function() { },
  K: function(x) { return x }
};

if (Prototype.Browser.MobileSafari)
  Prototype.BrowserFeatures.SpecificElementExtensions = false;


/* Based on Alex Arnell's inheritance implementation. */
var Class = {
  create: function() {
    var parent = null, properties = $A(arguments);
    if (Object.isFunction(properties[0]))
      parent = properties.shift();

    function klass() {
      this.initialize.apply(this, arguments);
    }

    Object.extend(klass, Class.Methods);
    klass.superclass = parent;
    klass.subclasses = [];

    if (parent) {
      var subclass = function() { };
      subclass.prototype = parent.prototype;
      klass.prototype = new subclass;
      parent.subclasses.push(klass);
    }

    for (var i = 0; i < properties.length; i++)
      klass.addMethods(properties[i]);

    if (!klass.prototype.initialize)
      klass.prototype.initialize = Prototype.emptyFunction;

    klass.prototype.constructor = klass;

    return klass;
  }
};

Class.Methods = {
  addMethods: function(source) {
    var ancestor   = this.superclass && this.superclass.prototype;
    var properties = Object.keys(source);

    if (!Object.keys({ toString: true }).length)
      properties.push("toString", "valueOf");

    for (var i = 0, length = properties.length; i < length; i++) {
      var property = properties[i], value = source[property];
      if (ancestor && Object.isFunction(value) &&
          value.argumentNames().first() == "$super") {
        var method = value, value = Object.extend((function(m) {
          return function() { return ancestor[m].apply(this, arguments) };
        })(property).wrap(method), {
          valueOf:  function() { return method },
          toString: function() { return method.toString() }
        });
      }
      this.prototype[property] = value;
    }

    return this;
  }
};

var Abstract = { };

Object.extend = function(destination, source) {
  for (var property in source)
    destination[property] = source[property];
  return destination;
};

Object.extend(Object, {
  inspect: function(object) {
    try {
      if (Object.isUndefined(object)) return 'undefined';
      if (object === null) return 'null';
      return object.inspect ? object.inspect() : String(object);
    } catch (e) {
      if (e instanceof RangeError) return '...';
      throw e;
    }
  },

  toJSON: function(object) {
    var type = typeof object;
    switch (type) {
      case 'undefined':
      case 'function':
      case 'unknown': return;
      case 'boolean': return object.toString();
    }

    if (object === null) return 'null';
    if (object.toJSON) return object.toJSON();
    if (Object.isElement(object)) return;

    var results = [];
    for (var property in object) {
      var value = Object.toJSON(object[property]);
      if (!Object.isUndefined(value))
        results.push(property.toJSON() + ': ' + value);
    }

    return '{' + results.join(', ') + '}';
  },

  toQueryString: function(object) {
    return $H(object).toQueryString();
  },

  toHTML: function(object) {
    return object && object.toHTML ? object.toHTML() : String.interpret(object);
  },

  keys: function(object) {
    var keys = [];
    for (var property in object)
      keys.push(property);
    return keys;
  },

  values: function(object) {
    var values = [];
    for (var property in object)
      values.push(object[property]);
    return values;
  },

  clone: function(object) {
    return Object.extend({ }, object);
  },

  isElement: function(object) {
    return object && object.nodeType == 1;
  },

  isArray: function(object) {
    return object != null && typeof object == "object" &&
      'splice' in object && 'join' in object;
  },

  isHash: function(object) {
    return object instanceof Hash;
  },

  isFunction: function(object) {
    return typeof object == "function";
  },

  isString: function(object) {
    return typeof object == "string";
  },

  isNumber: function(object) {
    return typeof object == "number";
  },

  isUndefined: function(object) {
    return typeof object == "undefined";
  }
});

Object.extend(Function.prototype, {
  argumentNames: function() {
    var names = this.toString().match(/^[\s\(]*function[^(]*\((.*?)\)/)[1].split(",").invoke("strip");
    return names.length == 1 && !names[0] ? [] : names;
  },

  bind: function() {
    if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;
    var __method = this, args = $A(arguments), object = args.shift();
    return function() {
      return __method.apply(object, args.concat($A(arguments)));
    }
  },

  bindAsEventListener: function() {
    var __method = this, args = $A(arguments), object = args.shift();
    return function(event) {
      return __method.apply(object, [event || window.event].concat(args));
    }
  },

  curry: function() {
    if (!arguments.length) return this;
    var __method = this, args = $A(arguments);
    return function() {
      return __method.apply(this, args.concat($A(arguments)));
    }
  },

  delay: function() {
    var __method = this, args = $A(arguments), timeout = args.shift() * 1000;
    return window.setTimeout(function() {
      return __method.apply(__method, args);
    }, timeout);
  },

  wrap: function(wrapper) {
    var __method = this;
    return function() {
      return wrapper.apply(this, [__method.bind(this)].concat($A(arguments)));
    }
  },

  methodize: function() {
    if (this._methodized) return this._methodized;
    var __method = this;
    return this._methodized = function() {
      return __method.apply(null, [this].concat($A(arguments)));
    };
  }
});

Function.prototype.defer = Function.prototype.delay.curry(0.01);

Date.prototype.toJSON = function() {
  return '"' + this.getUTCFullYear() + '-' +
    (this.getUTCMonth() + 1).toPaddedString(2) + '-' +
    this.getUTCDate().toPaddedString(2) + 'T' +
    this.getUTCHours().toPaddedString(2) + ':' +
    this.getUTCMinutes().toPaddedString(2) + ':' +
    this.getUTCSeconds().toPaddedString(2) + 'Z"';
};

var Try = {
  these: function() {
    var returnValue;

    for (var i = 0, length = arguments.length; i < length; i++) {
      var lambda = arguments[i];
      try {
        returnValue = lambda();
        break;
      } catch (e) { }
    }

    return returnValue;
  }
};

RegExp.prototype.match = RegExp.prototype.test;

RegExp.escape = function(str) {
  return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
};

/*--------------------------------------------------------------------------*/

var PeriodicalExecuter = Class.create({
  initialize: function(callback, frequency) {
    this.callback = callback;
    this.frequency = frequency;
    this.currentlyExecuting = false;

    this.registerCallback();
  },

  registerCallback: function() {
    this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
  },

  execute: function() {
    this.callback(this);
  },

  stop: function() {
    if (!this.timer) return;
    clearInterval(this.timer);
    this.timer = null;
  },

  onTimerEvent: function() {
    if (!this.currentlyExecuting) {
      try {
        this.currentlyExecuting = true;
        this.execute();
      } finally {
        this.currentlyExecuting = false;
      }
    }
  }
});
Object.extend(String, {
  interpret: function(value) {
    return value == null ? '' : String(value);
  },
  specialChar: {
    '\b': '\\b',
    '\t': '\\t',
    '\n': '\\n',
    '\f': '\\f',
    '\r': '\\r',
    '\\': '\\\\'
  }
});

Object.extend(String.prototype, {
  gsub: function(pattern, replacement) {
    var result = '', source = this, match;
    replacement = arguments.callee.prepareReplacement(replacement);

    while (source.length > 0) {
      if (match = source.match(pattern)) {
        result += source.slice(0, match.index);
        result += String.interpret(replacement(match));
        source  = source.slice(match.index + match[0].length);
      } else {
        result += source, source = '';
      }
    }
    return result;
  },

  sub: function(pattern, replacement, count) {
    replacement = this.gsub.prepareReplacement(replacement);
    count = Object.isUndefined(count) ? 1 : count;

    return this.gsub(pattern, function(match) {
      if (--count < 0) return match[0];
      return replacement(match);
    });
  },

  scan: function(pattern, iterator) {
    this.gsub(pattern, iterator);
    return String(this);
  },

  truncate: function(length, truncation) {
    length = length || 30;
    truncation = Object.isUndefined(truncation) ? '...' : truncation;
    return this.length > length ?
      this.slice(0, length - truncation.length) + truncation : String(this);
  },

  strip: function() {
    return this.replace(/^\s+/, '').replace(/\s+$/, '');
  },

  stripTags: function() {
    return this.replace(/<\/?[^>]+>/gi, '');
  },

  stripScripts: function() {
    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
  },

  extractScripts: function() {
    var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
    var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
    return (this.match(matchAll) || []).map(function(scriptTag) {
      return (scriptTag.match(matchOne) || ['', ''])[1];
    });
  },

  evalScripts: function() {
    return this.extractScripts().map(function(script) { return eval(script) });
  },

  escapeHTML: function() {
    var self = arguments.callee;
    self.text.data = this;
    return self.div.innerHTML;
  },

  unescapeHTML: function() {
    var div = new Element('div');
    div.innerHTML = this.stripTags();
    return div.childNodes[0] ? (div.childNodes.length > 1 ?
      $A(div.childNodes).inject('', function(memo, node) { return memo+node.nodeValue }) :
      div.childNodes[0].nodeValue) : '';
  },

  toQueryParams: function(separator) {
    var match = this.strip().match(/([^?#]*)(#.*)?$/);
    if (!match) return { };

    return match[1].split(separator || '&').inject({ }, function(hash, pair) {
      if ((pair = pair.split('='))[0]) {
        var key = decodeURIComponent(pair.shift());
        var value = pair.length > 1 ? pair.join('=') : pair[0];
        if (value != undefined) value = decodeURIComponent(value);

        if (key in hash) {
          if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
          hash[key].push(value);
        }
        else hash[key] = value;
      }
      return hash;
    });
  },

  toArray: function() {
    return this.split('');
  },

  succ: function() {
    return this.slice(0, this.length - 1) +
      String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
  },

  times: function(count) {
    return count < 1 ? '' : new Array(count + 1).join(this);
  },

  camelize: function() {
    var parts = this.split('-'), len = parts.length;
    if (len == 1) return parts[0];

    var camelized = this.charAt(0) == '-'
      ? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
      : parts[0];

    for (var i = 1; i < len; i++)
      camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);

    return camelized;
  },

  capitalize: function() {
    return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
  },

  underscore: function() {
    return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
  },

  dasherize: function() {
    return this.gsub(/_/,'-');
  },

  inspect: function(useDoubleQuotes) {
    var escapedString = this.gsub(/[\x00-\x1f\\]/, function(match) {
      var character = String.specialChar[match[0]];
      return character ? character : '\\u00' + match[0].charCodeAt().toPaddedString(2, 16);
    });
    if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
    return "'" + escapedString.replace(/'/g, '\\\'') + "'";
  },

  toJSON: function() {
    return this.inspect(true);
  },

  unfilterJSON: function(filter) {
    return this.sub(filter || Prototype.JSONFilter, '#{1}');
  },

  isJSON: function() {
    var str = this;
    if (str.blank()) return false;
    str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
    return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
  },

  evalJSON: function(sanitize) {
    var json = this.unfilterJSON();
    try {
      if (!sanitize || json.isJSON()) return eval('(' + json + ')');
    } catch (e) { }
    throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
  },

  include: function(pattern) {
    return this.indexOf(pattern) > -1;
  },

  startsWith: function(pattern) {
    return this.indexOf(pattern) === 0;
  },

  endsWith: function(pattern) {
    var d = this.length - pattern.length;
    return d >= 0 && this.lastIndexOf(pattern) === d;
  },

  empty: function() {
    return this == '';
  },

  blank: function() {
    return /^\s*$/.test(this);
  },

  interpolate: function(object, pattern) {
    return new Template(this, pattern).evaluate(object);
  }
});

if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, {
  escapeHTML: function() {
    return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
  },
  unescapeHTML: function() {
    return this.replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>');
  }
});

String.prototype.gsub.prepareReplacement = function(replacement) {
  if (Object.isFunction(replacement)) return replacement;
  var template = new Template(replacement);
  return function(match) { return template.evaluate(match) };
};

String.prototype.parseQuery = String.prototype.toQueryParams;

Object.extend(String.prototype.escapeHTML, {
  div:  document.createElement('div'),
  text: document.createTextNode('')
});

with (String.prototype.escapeHTML) div.appendChild(text);

var Template = Class.create({
  initialize: function(template, pattern) {
    this.template = template.toString();
    this.pattern = pattern || Template.Pattern;
  },

  evaluate: function(object) {
    if (Object.isFunction(object.toTemplateReplacements))
      object = object.toTemplateReplacements();

    return this.template.gsub(this.pattern, function(match) {
      if (object == null) return '';

      var before = match[1] || '';
      if (before == '\\') return match[2];

      var ctx = object, expr = match[3];
      var pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;
      match = pattern.exec(expr);
      if (match == null) return before;

      while (match != null) {
        var comp = match[1].startsWith('[') ? match[2].gsub('\\\\]', ']') : match[1];
        ctx = ctx[comp];
        if (null == ctx || '' == match[3]) break;
        expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
        match = pattern.exec(expr);
      }

      return before + String.interpret(ctx);
    });
  }
});
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;

var $break = { };

var Enumerable = {
  each: function(iterator, context) {
    var index = 0;
    iterator = iterator.bind(context);
    try {
      this._each(function(value) {
        iterator(value, index++);
      });
    } catch (e) {
      if (e != $break) throw e;
    }
    return this;
  },

  eachSlice: function(number, iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var index = -number, slices = [], array = this.toArray();
    while ((index += number) < array.length)
      slices.push(array.slice(index, index+number));
    return slices.collect(iterator, context);
  },

  all: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result = true;
    this.each(function(value, index) {
      result = result && !!iterator(value, index);
      if (!result) throw $break;
    });
    return result;
  },

  any: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result = false;
    this.each(function(value, index) {
      if (result = !!iterator(value, index))
        throw $break;
    });
    return result;
  },

  collect: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var results = [];
    this.each(function(value, index) {
      results.push(iterator(value, index));
    });
    return results;
  },

  detect: function(iterator, context) {
    iterator = iterator.bind(context);
    var result;
    this.each(function(value, index) {
      if (iterator(value, index)) {
        result = value;
        throw $break;
      }
    });
    return result;
  },

  findAll: function(iterator, context) {
    iterator = iterator.bind(context);
    var results = [];
    this.each(function(value, index) {
      if (iterator(value, index))
        results.push(value);
    });
    return results;
  },

  grep: function(filter, iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var results = [];

    if (Object.isString(filter))
      filter = new RegExp(filter);

    this.each(function(value, index) {
      if (filter.match(value))
        results.push(iterator(value, index));
    });
    return results;
  },

  include: function(object) {
    if (Object.isFunction(this.indexOf))
      if (this.indexOf(object) != -1) return true;

    var found = false;
    this.each(function(value) {
      if (value == object) {
        found = true;
        throw $break;
      }
    });
    return found;
  },

  inGroupsOf: function(number, fillWith) {
    fillWith = Object.isUndefined(fillWith) ? null : fillWith;
    return this.eachSlice(number, function(slice) {
      while(slice.length < number) slice.push(fillWith);
      return slice;
    });
  },

  inject: function(memo, iterator, context) {
    iterator = iterator.bind(context);
    this.each(function(value, index) {
      memo = iterator(memo, value, index);
    });
    return memo;
  },

  invoke: function(method) {
    var args = $A(arguments).slice(1);
    return this.map(function(value) {
      return value[method].apply(value, args);
    });
  },

  max: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result;
    this.each(function(value, index) {
      value = iterator(value, index);
      if (result == null || value >= result)
        result = value;
    });
    return result;
  },

  min: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result;
    this.each(function(value, index) {
      value = iterator(value, index);
      if (result == null || value < result)
        result = value;
    });
    return result;
  },

  partition: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var trues = [], falses = [];
    this.each(function(value, index) {
      (iterator(value, index) ?
        trues : falses).push(value);
    });
    return [trues, falses];
  },

  pluck: function(property) {
    var results = [];
    this.each(function(value) {
      results.push(value[property]);
    });
    return results;
  },

  reject: function(iterator, context) {
    iterator = iterator.bind(context);
    var results = [];
    this.each(function(value, index) {
      if (!iterator(value, index))
        results.push(value);
    });
    return results;
  },

  sortBy: function(iterator, context) {
    iterator = iterator.bind(context);
    return this.map(function(value, index) {
      return {value: value, criteria: iterator(value, index)};
    }).sort(function(left, right) {
      var a = left.criteria, b = right.criteria;
      return a < b ? -1 : a > b ? 1 : 0;
    }).pluck('value');
  },

  toArray: function() {
    return this.map();
  },

  zip: function() {
    var iterator = Prototype.K, args = $A(arguments);
    if (Object.isFunction(args.last()))
      iterator = args.pop();

    var collections = [this].concat(args).map($A);
    return this.map(function(value, index) {
      return iterator(collections.pluck(index));
    });
  },

  size: function() {
    return this.toArray().length;
  },

  inspect: function() {
    return '#<Enumerable:' + this.toArray().inspect() + '>';
  }
};

Object.extend(Enumerable, {
  map:     Enumerable.collect,
  find:    Enumerable.detect,
  select:  Enumerable.findAll,
  filter:  Enumerable.findAll,
  member:  Enumerable.include,
  entries: Enumerable.toArray,
  every:   Enumerable.all,
  some:    Enumerable.any
});
function $A(iterable) {
  if (!iterable) return [];
  if (iterable.toArray) return iterable.toArray();
  var length = iterable.length || 0, results = new Array(length);
  while (length--) results[length] = iterable[length];
  return results;
}

if (Prototype.Browser.WebKit) {
  $A = function(iterable) {
    if (!iterable) return [];
    if (!(Object.isFunction(iterable) && iterable == '[object NodeList]') &&
        iterable.toArray) return iterable.toArray();
    var length = iterable.length || 0, results = new Array(length);
    while (length--) results[length] = iterable[length];
    return results;
  };
}

Array.from = $A;

Object.extend(Array.prototype, Enumerable);

if (!Array.prototype._reverse) Array.prototype._reverse = Array.prototype.reverse;

Object.extend(Array.prototype, {
  _each: function(iterator) {
    for (var i = 0, length = this.length; i < length; i++)
      iterator(this[i]);
  },

  clear: function() {
    this.length = 0;
    return this;
  },

  first: function() {
    return this[0];
  },

  last: function() {
    return this[this.length - 1];
  },

  compact: function() {
    return this.select(function(value) {
      return value != null;
    });
  },

  flatten: function() {
    return this.inject([], function(array, value) {
      return array.concat(Object.isArray(value) ?
        value.flatten() : [value]);
    });
  },

  without: function() {
    var values = $A(arguments);
    return this.select(function(value) {
      return !values.include(value);
    });
  },

  reverse: function(inline) {
    return (inline !== false ? this : this.toArray())._reverse();
  },

  reduce: function() {
    return this.length > 1 ? this : this[0];
  },

  uniq: function(sorted) {
    return this.inject([], function(array, value, index) {
      if (0 == index || (sorted ? array.last() != value : !array.include(value)))
        array.push(value);
      return array;
    });
  },

  intersect: function(array) {
    return this.uniq().findAll(function(item) {
      return array.detect(function(value) { return item === value });
    });
  },

  clone: function() {
    return [].concat(this);
  },

  size: function() {
    return this.length;
  },

  inspect: function() {
    return '[' + this.map(Object.inspect).join(', ') + ']';
  },

  toJSON: function() {
    var results = [];
    this.each(function(object) {
      var value = Object.toJSON(object);
      if (!Object.isUndefined(value)) results.push(value);
    });
    return '[' + results.join(', ') + ']';
  }
});

// use native browser JS 1.6 implementation if available
if (Object.isFunction(Array.prototype.forEach))
  Array.prototype._each = Array.prototype.forEach;

if (!Array.prototype.indexOf) Array.prototype.indexOf = function(item, i) {
  i || (i = 0);
  var length = this.length;
  if (i < 0) i = length + i;
  for (; i < length; i++)
    if (this[i] === item) return i;
  return -1;
};

if (!Array.prototype.lastIndexOf) Array.prototype.lastIndexOf = function(item, i) {
  i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
  var n = this.slice(0, i).reverse().indexOf(item);
  return (n < 0) ? n : i - n - 1;
};

Array.prototype.toArray = Array.prototype.clone;

function $w(string) {
  if (!Object.isString(string)) return [];
  string = string.strip();
  return string ? string.split(/\s+/) : [];
}

if (Prototype.Browser.Opera){
  Array.prototype.concat = function() {
    var array = [];
    for (var i = 0, length = this.length; i < length; i++) array.push(this[i]);
    for (var i = 0, length = arguments.length; i < length; i++) {
      if (Object.isArray(arguments[i])) {
        for (var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
          array.push(arguments[i][j]);
      } else {
        array.push(arguments[i]);
      }
    }
    return array;
  };
}
Object.extend(Number.prototype, {
  toColorPart: function() {
    return this.toPaddedString(2, 16);
  },

  succ: function() {
    return this + 1;
  },

  times: function(iterator) {
    $R(0, this, true).each(iterator);
    return this;
  },

  toPaddedString: function(length, radix) {
    var string = this.toString(radix || 10);
    return '0'.times(length - string.length) + string;
  },

  toJSON: function() {
    return isFinite(this) ? this.toString() : 'null';
  }
});

$w('abs round ceil floor').each(function(method){
  Number.prototype[method] = Math[method].methodize();
});
function $H(object) {
  return new Hash(object);
};

var Hash = Class.create(Enumerable, (function() {

  function toQueryPair(key, value) {
    if (Object.isUndefined(value)) return key;
    return key + '=' + encodeURIComponent(String.interpret(value));
  }

  return {
    initialize: function(object) {
      this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
    },

    _each: function(iterator) {
      for (var key in this._object) {
        var value = this._object[key], pair = [key, value];
        pair.key = key;
        pair.value = value;
        iterator(pair);
      }
    },

    set: function(key, value) {
      return this._object[key] = value;
    },

    get: function(key) {
      return this._object[key];
    },

    unset: function(key) {
      var value = this._object[key];
      delete this._object[key];
      return value;
    },

    toObject: function() {
      return Object.clone(this._object);
    },

    keys: function() {
      return this.pluck('key');
    },

    values: function() {
      return this.pluck('value');
    },

    index: function(value) {
      var match = this.detect(function(pair) {
        return pair.value === value;
      });
      return match && match.key;
    },

    merge: function(object) {
      return this.clone().update(object);
    },

    update: function(object) {
      return new Hash(object).inject(this, function(result, pair) {
        result.set(pair.key, pair.value);
        return result;
      });
    },

    toQueryString: function() {
      return this.map(function(pair) {
        var key = encodeURIComponent(pair.key), values = pair.value;

        if (values && typeof values == 'object') {
          if (Object.isArray(values))
            return values.map(toQueryPair.curry(key)).join('&');
        }
        return toQueryPair(key, values);
      }).join('&');
    },

    inspect: function() {
      return '#<Hash:{' + this.map(function(pair) {
        return pair.map(Object.inspect).join(': ');
      }).join(', ') + '}>';
    },

    toJSON: function() {
      return Object.toJSON(this.toObject());
    },

    clone: function() {
      return new Hash(this);
    }
  }
})());

Hash.prototype.toTemplateReplacements = Hash.prototype.toObject;
Hash.from = $H;
var ObjectRange = Class.create(Enumerable, {
  initialize: function(start, end, exclusive) {
    this.start = start;
    this.end = end;
    this.exclusive = exclusive;
  },

  _each: function(iterator) {
    var value = this.start;
    while (this.include(value)) {
      iterator(value);
      value = value.succ();
    }
  },

  include: function(value) {
    if (value < this.start)
      return false;
    if (this.exclusive)
      return value < this.end;
    return value <= this.end;
  }
});

var $R = function(start, end, exclusive) {
  return new ObjectRange(start, end, exclusive);
};

var Ajax = {
  getTransport: function() {
    return Try.these(
      function() {return new XMLHttpRequest()},
      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
      function() {return new ActiveXObject('Microsoft.XMLHTTP')}
    ) || false;
  },

  activeRequestCount: 0
};

Ajax.Responders = {
  responders: [],

  _each: function(iterator) {
    this.responders._each(iterator);
  },

  register: function(responder) {
    if (!this.include(responder))
      this.responders.push(responder);
  },

  unregister: function(responder) {
    this.responders = this.responders.without(responder);
  },

  dispatch: function(callback, request, transport, json) {
    this.each(function(responder) {
      if (Object.isFunction(responder[callback])) {
        try {
          responder[callback].apply(responder, [request, transport, json]);
        } catch (e) { }
      }
    });
  }
};

Object.extend(Ajax.Responders, Enumerable);

Ajax.Responders.register({
  onCreate:   function() { Ajax.activeRequestCount++ },
  onComplete: function() { Ajax.activeRequestCount-- }
});

Ajax.Base = Class.create({
  initialize: function(options) {
    this.options = {
      method:       'post',
      asynchronous: true,
      contentType:  'application/x-www-form-urlencoded',
      encoding:     'UTF-8',
      parameters:   '',
      evalJSON:     true,
      evalJS:       true
    };
    Object.extend(this.options, options || { });

    this.options.method = this.options.method.toLowerCase();

    if (Object.isString(this.options.parameters))
      this.options.parameters = this.options.parameters.toQueryParams();
    else if (Object.isHash(this.options.parameters))
      this.options.parameters = this.options.parameters.toObject();
  }
});

Ajax.Request = Class.create(Ajax.Base, {
  _complete: false,

  initialize: function($super, url, options) {
    $super(options);
    this.transport = Ajax.getTransport();
    this.request(url);
  },

  request: function(url) {
    this.url = url;
    this.method = this.options.method;
    var params = Object.clone(this.options.parameters);

    if (!['get', 'post'].include(this.method)) {
      // simulate other verbs over post
      params['_method'] = this.method;
      this.method = 'post';
    }

    this.parameters = params;

    if (params = Object.toQueryString(params)) {
      // when GET, append parameters to URL
      if (this.method == 'get')
        this.url += (this.url.include('?') ? '&' : '?') + params;
      else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
        params += '&_=';
    }

    try {
      var response = new Ajax.Response(this);
      if (this.options.onCreate) this.options.onCreate(response);
      Ajax.Responders.dispatch('onCreate', this, response);

      this.transport.open(this.method.toUpperCase(), this.url,
        this.options.asynchronous);

      if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);

      this.transport.onreadystatechange = this.onStateChange.bind(this);
      this.setRequestHeaders();

      this.body = this.method == 'post' ? (this.options.postBody || params) : null;
      this.transport.send(this.body);

      /* Force Firefox to handle ready state 4 for synchronous requests */
      if (!this.options.asynchronous && this.transport.overrideMimeType)
        this.onStateChange();

    }
    catch (e) {
      this.dispatchException(e);
    }
  },

  onStateChange: function() {
    var readyState = this.transport.readyState;
    if (readyState > 1 && !((readyState == 4) && this._complete))
      this.respondToReadyState(this.transport.readyState);
  },

  setRequestHeaders: function() {
    var headers = {
      'X-Requested-With': 'XMLHttpRequest',
      'X-Prototype-Version': Prototype.Version,
      'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
    };

    if (this.method == 'post') {
      headers['Content-type'] = this.options.contentType +
        (this.options.encoding ? '; charset=' + this.options.encoding : '');

      /* Force "Connection: close" for older Mozilla browsers to work
       * around a bug where XMLHttpRequest sends an incorrect
       * Content-length header. See Mozilla Bugzilla #246651.
       */
      if (this.transport.overrideMimeType &&
          (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
            headers['Connection'] = 'close';
    }

    // user-defined headers
    if (typeof this.options.requestHeaders == 'object') {
      var extras = this.options.requestHeaders;

      if (Object.isFunction(extras.push))
        for (var i = 0, length = extras.length; i < length; i += 2)
          headers[extras[i]] = extras[i+1];
      else
        $H(extras).each(function(pair) { headers[pair.key] = pair.value });
    }

    for (var name in headers)
      this.transport.setRequestHeader(name, headers[name]);
  },

  success: function() {
    var status = this.getStatus();
    return !status || (status >= 200 && status < 300);
  },

  getStatus: function() {
    try {
      return this.transport.status || 0;
    } catch (e) { return 0 }
  },

  respondToReadyState: function(readyState) {
    var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);

    if (state == 'Complete') {
      try {
        this._complete = true;
        (this.options['on' + response.status]
         || this.options['on' + (this.success() ? 'Success' : 'Failure')]
         || Prototype.emptyFunction)(response, response.headerJSON);
      } catch (e) {
        this.dispatchException(e);
      }

      var contentType = response.getHeader('Content-type');
      if (this.options.evalJS == 'force'
          || (this.options.evalJS && this.isSameOrigin() && contentType
          && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
        this.evalResponse();
    }

    try {
      (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
      Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
    } catch (e) {
      this.dispatchException(e);
    }

    if (state == 'Complete') {
      // avoid memory leak in MSIE: clean up
      this.transport.onreadystatechange = Prototype.emptyFunction;
    }
  },

  isSameOrigin: function() {
    var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
    return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({
      protocol: location.protocol,
      domain: document.domain,
      port: location.port ? ':' + location.port : ''
    }));
  },

  getHeader: function(name) {
    try {
      return this.transport.getResponseHeader(name) || null;
    } catch (e) { return null }
  },

  evalResponse: function() {
    try {
      return eval((this.transport.responseText || '').unfilterJSON());
    } catch (e) {
      this.dispatchException(e);
    }
  },

  dispatchException: function(exception) {
    (this.options.onException || Prototype.emptyFunction)(this, exception);
    Ajax.Responders.dispatch('onException', this, exception);
  }
});

Ajax.Request.Events =
  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];

Ajax.Response = Class.create({
  initialize: function(request){
    this.request = request;
    var transport  = this.transport  = request.transport,
        readyState = this.readyState = transport.readyState;

    if((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
      this.status       = this.getStatus();
      this.statusText   = this.getStatusText();
      this.responseText = String.interpret(transport.responseText);
      this.headerJSON   = this._getHeaderJSON();
    }

    if(readyState == 4) {
      var xml = transport.responseXML;
      this.responseXML  = Object.isUndefined(xml) ? null : xml;
      this.responseJSON = this._getResponseJSON();
    }
  },

  status:      0,
  statusText: '',

  getStatus: Ajax.Request.prototype.getStatus,

  getStatusText: function() {
    try {
      return this.transport.statusText || '';
    } catch (e) { return '' }
  },

  getHeader: Ajax.Request.prototype.getHeader,

  getAllHeaders: function() {
    try {
      return this.getAllResponseHeaders();
    } catch (e) { return null }
  },

  getResponseHeader: function(name) {
    return this.transport.getResponseHeader(name);
  },

  getAllResponseHeaders: function() {
    return this.transport.getAllResponseHeaders();
  },

  _getHeaderJSON: function() {
    var json = this.getHeader('X-JSON');
    if (!json) return null;
    json = decodeURIComponent(escape(json));
    try {
      return json.evalJSON(this.request.options.sanitizeJSON ||
        !this.request.isSameOrigin());
    } catch (e) {
      this.request.dispatchException(e);
    }
  },

  _getResponseJSON: function() {
    var options = this.request.options;
    if (!options.evalJSON || (options.evalJSON != 'force' &&
      !(this.getHeader('Content-type') || '').include('application/json')) ||
        this.responseText.blank())
          return null;
    try {
      return this.responseText.evalJSON(options.sanitizeJSON ||
        !this.request.isSameOrigin());
    } catch (e) {
      this.request.dispatchException(e);
    }
  }
});

Ajax.Updater = Class.create(Ajax.Request, {
  initialize: function($super, container, url, options) {
    this.container = {
      success: (container.success || container),
      failure: (container.failure || (container.success ? null : container))
    };

    options = Object.clone(options);
    var onComplete = options.onComplete;
    options.onComplete = (function(response, json) {
      this.updateContent(response.responseText);
      if (Object.isFunction(onComplete)) onComplete(response, json);
    }).bind(this);

    $super(url, options);
  },

  updateContent: function(responseText) {
    var receiver = this.container[this.success() ? 'success' : 'failure'],
        options = this.options;

    if (!options.evalScripts) responseText = responseText.stripScripts();

    if (receiver = $(receiver)) {
      if (options.insertion) {
        if (Object.isString(options.insertion)) {
          var insertion = { }; insertion[options.insertion] = responseText;
          receiver.insert(insertion);
        }
        else options.insertion(receiver, responseText);
      }
      else receiver.update(responseText);
    }
  }
});

Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
  initialize: function($super, container, url, options) {
    $super(options);
    this.onComplete = this.options.onComplete;

    this.frequency = (this.options.frequency || 2);
    this.decay = (this.options.decay || 1);

    this.updater = { };
    this.container = container;
    this.url = url;

    this.start();
  },

  start: function() {
    this.options.onComplete = this.updateComplete.bind(this);
    this.onTimerEvent();
  },

  stop: function() {
    this.updater.options.onComplete = undefined;
    clearTimeout(this.timer);
    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
  },

  updateComplete: function(response) {
    if (this.options.decay) {
      this.decay = (response.responseText == this.lastText ?
        this.decay * this.options.decay : 1);

      this.lastText = response.responseText;
    }
    this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
  },

  onTimerEvent: function() {
    this.updater = new Ajax.Updater(this.container, this.url, this.options);
  }
});
function $(element) {
  if (arguments.length > 1) {
    for (var i = 0, elements = [], length = arguments.length; i < length; i++)
      elements.push($(arguments[i]));
    return elements;
  }
  if (Object.isString(element))
    element = document.getElementById(element);
  return Element.extend(element);
}

if (Prototype.BrowserFeatures.XPath) {
  document._getElementsByXPath = function(expression, parentElement) {
    var results = [];
    var query = document.evaluate(expression, $(parentElement) || document,
      null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
    for (var i = 0, length = query.snapshotLength; i < length; i++)
      results.push(Element.extend(query.snapshotItem(i)));
    return results;
  };
}

/*--------------------------------------------------------------------------*/

if (!window.Node) var Node = { };

if (!Node.ELEMENT_NODE) {
  // DOM level 2 ECMAScript Language Binding
  Object.extend(Node, {
    ELEMENT_NODE: 1,
    ATTRIBUTE_NODE: 2,
    TEXT_NODE: 3,
    CDATA_SECTION_NODE: 4,
    ENTITY_REFERENCE_NODE: 5,
    ENTITY_NODE: 6,
    PROCESSING_INSTRUCTION_NODE: 7,
    COMMENT_NODE: 8,
    DOCUMENT_NODE: 9,
    DOCUMENT_TYPE_NODE: 10,
    DOCUMENT_FRAGMENT_NODE: 11,
    NOTATION_NODE: 12
  });
}

(function() {
  var element = this.Element;
  this.Element = function(tagName, attributes) {
    attributes = attributes || { };
    tagName = tagName.toLowerCase();
    var cache = Element.cache;
    if (Prototype.Browser.IE && attributes.name) {
      tagName = '<' + tagName + ' name="' + attributes.name + '">';
      delete attributes.name;
      return Element.writeAttribute(document.createElement(tagName), attributes);
    }
    if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
    return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
  };
  Object.extend(this.Element, element || { });
}).call(window);

Element.cache = { };

Element.Methods = {
  visible: function(element) {
    return $(element).style.display != 'none';
  },

  toggle: function(element) {
    element = $(element);
    Element[Element.visible(element) ? 'hide' : 'show'](element);
    return element;
  },

  hide: function(element) {
    $(element).style.display = 'none';
    return element;
  },

  show: function(element) {
    $(element).style.display = '';
    return element;
  },

  remove: function(element) {
    element = $(element);
    element.parentNode.removeChild(element);
    return element;
  },

  update: function(element, content) {
    element = $(element);
    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) return element.update().insert(content);
    content = Object.toHTML(content);
    element.innerHTML = content.stripScripts();
    content.evalScripts.bind(content).defer();
    return element;
  },

  replace: function(element, content) {
    element = $(element);
    if (content && content.toElement) content = content.toElement();
    else if (!Object.isElement(content)) {
      content = Object.toHTML(content);
      var range = element.ownerDocument.createRange();
      range.selectNode(element);
      content.evalScripts.bind(content).defer();
      content = range.createContextualFragment(content.stripScripts());
    }
    element.parentNode.replaceChild(content, element);
    return element;
  },

  insert: function(element, insertions) {
    element = $(element);

    if (Object.isString(insertions) || Object.isNumber(insertions) ||
        Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
          insertions = {bottom:insertions};

    var content, insert, tagName, childNodes;

    for (var position in insertions) {
      content  = insertions[position];
      position = position.toLowerCase();
      insert = Element._insertionTranslations[position];

      if (content && content.toElement) content = content.toElement();
      if (Object.isElement(content)) {
        insert(element, content);
        continue;
      }

      content = Object.toHTML(content);

      tagName = ((position == 'before' || position == 'after')
        ? element.parentNode : element).tagName.toUpperCase();

      childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());

      if (position == 'top' || position == 'after') childNodes.reverse();
      childNodes.each(insert.curry(element));

      content.evalScripts.bind(content).defer();
    }

    return element;
  },

  wrap: function(element, wrapper, attributes) {
    element = $(element);
    if (Object.isElement(wrapper))
      $(wrapper).writeAttribute(attributes || { });
    else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);
    else wrapper = new Element('div', wrapper);
    if (element.parentNode)
      element.parentNode.replaceChild(wrapper, element);
    wrapper.appendChild(element);
    return wrapper;
  },

  inspect: function(element) {
    element = $(element);
    var result = '<' + element.tagName.toLowerCase();
    $H({'id': 'id', 'className': 'class'}).each(function(pair) {
      var property = pair.first(), attribute = pair.last();
      var value = (element[property] || '').toString();
      if (value) result += ' ' + attribute + '=' + value.inspect(true);
    });
    return result + '>';
  },

  recursivelyCollect: function(element, property) {
    element = $(element);
    var elements = [];
    while (element = element[property])
      if (element.nodeType == 1)
        elements.push(Element.extend(element));
    return elements;
  },

  ancestors: function(element) {
    return $(element).recursivelyCollect('parentNode');
  },

  descendants: function(element) {
    return $(element).select("*");
  },

  firstDescendant: function(element) {
    element = $(element).firstChild;
    while (element && element.nodeType != 1) element = element.nextSibling;
    return $(element);
  },

  immediateDescendants: function(element) {
    if (!(element = $(element).firstChild)) return [];
    while (element && element.nodeType != 1) element = element.nextSibling;
    if (element) return [element].concat($(element).nextSiblings());
    return [];
  },

  previousSiblings: function(element) {
    return $(element).recursivelyCollect('previousSibling');
  },

  nextSiblings: function(element) {
    return $(element).recursivelyCollect('nextSibling');
  },

  siblings: function(element) {
    element = $(element);
    return element.previousSiblings().reverse().concat(element.nextSiblings());
  },

  match: function(element, selector) {
    if (Object.isString(selector))
      selector = new Selector(selector);
    return selector.match($(element));
  },

  up: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(element.parentNode);
    var ancestors = element.ancestors();
    return Object.isNumber(expression) ? ancestors[expression] :
      Selector.findElement(ancestors, expression, index);
  },

  down: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return element.firstDescendant();
    return Object.isNumber(expression) ? element.descendants()[expression] :
      element.select(expression)[index || 0];
  },

  previous: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
    var previousSiblings = element.previousSiblings();
    return Object.isNumber(expression) ? previousSiblings[expression] :
      Selector.findElement(previousSiblings, expression, index);
  },

  next: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
    var nextSiblings = element.nextSiblings();
    return Object.isNumber(expression) ? nextSiblings[expression] :
      Selector.findElement(nextSiblings, expression, index);
  },

  select: function() {
    var args = $A(arguments), element = $(args.shift());
    return Selector.findChildElements(element, args);
  },

  adjacent: function() {
    var args = $A(arguments), element = $(args.shift());
    return Selector.findChildElements(element.parentNode, args).without(element);
  },

  identify: function(element) {
    element = $(element);
    var id = element.readAttribute('id'), self = arguments.callee;
    if (id) return id;
    do { id = 'anonymous_element_' + self.counter++ } while ($(id));
    element.writeAttribute('id', id);
    return id;
  },

  readAttribute: function(element, name) {
    element = $(element);
    if (Prototype.Browser.IE) {
      var t = Element._attributeTranslations.read;
      if (t.values[name]) return t.values[name](element, name);
      if (t.names[name]) name = t.names[name];
      if (name.include(':')) {
        return (!element.attributes || !element.attributes[name]) ? null :
         element.attributes[name].value;
      }
    }
    return element.getAttribute(name);
  },

  writeAttribute: function(element, name, value) {
    element = $(element);
    var attributes = { }, t = Element._attributeTranslations.write;

    if (typeof name == 'object') attributes = name;
    else attributes[name] = Object.isUndefined(value) ? true : value;

    for (var attr in attributes) {
      name = t.names[attr] || attr;
      value = attributes[attr];
      if (t.values[attr]) name = t.values[attr](element, value);
      if (value === false || value === null)
        element.removeAttribute(name);
      else if (value === true)
        element.setAttribute(name, name);
      else element.setAttribute(name, value);
    }
    return element;
  },

  getHeight: function(element) {
    return $(element).getDimensions().height;
  },

  getWidth: function(element) {
    return $(element).getDimensions().width;
  },

  classNames: function(element) {
    return new Element.ClassNames(element);
  },

  hasClassName: function(element, className) {
    if (!(element = $(element))) return;
    var elementClassName = element.className;
    return (elementClassName.length > 0 && (elementClassName == className ||
      new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
  },

  addClassName: function(element, className) {
    if (!(element = $(element))) return;
    if (!element.hasClassName(className))
      element.className += (element.className ? ' ' : '') + className;
    return element;
  },

  removeClassName: function(element, className) {
    if (!(element = $(element))) return;
    element.className = element.className.replace(
      new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
    return element;
  },

  toggleClassName: function(element, className) {
    if (!(element = $(element))) return;
    return element[element.hasClassName(className) ?
      'removeClassName' : 'addClassName'](className);
  },

  // removes whitespace-only text node children
  cleanWhitespace: function(element) {
    element = $(element);
    var node = element.firstChild;
    while (node) {
      var nextNode = node.nextSibling;
      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
        element.removeChild(node);
      node = nextNode;
    }
    return element;
  },

  empty: function(element) {
    return $(element).innerHTML.blank();
  },

  descendantOf: function(element, ancestor) {
    element = $(element), ancestor = $(ancestor);
    var originalAncestor = ancestor;

    if (element.compareDocumentPosition)
      return (element.compareDocumentPosition(ancestor) & 8) === 8;

    if (element.sourceIndex && !Prototype.Browser.Opera) {
      var e = element.sourceIndex, a = ancestor.sourceIndex,
       nextAncestor = ancestor.nextSibling;
      if (!nextAncestor) {
        do { ancestor = ancestor.parentNode; }
        while (!(nextAncestor = ancestor.nextSibling) && ancestor.parentNode);
      }
      if (nextAncestor && nextAncestor.sourceIndex)
       return (e > a && e < nextAncestor.sourceIndex);
    }

    while (element = element.parentNode)
      if (element == originalAncestor) return true;
    return false;
  },

  scrollTo: function(element) {
    element = $(element);
    var pos = element.cumulativeOffset();
    window.scrollTo(pos[0], pos[1]);
    return element;
  },

  getStyle: function(element, style) {
    element = $(element);
    style = style == 'float' ? 'cssFloat' : style.camelize();
    var value = element.style[style];
    if (!value) {
      var css = document.defaultView.getComputedStyle(element, null);
      value = css ? css[style] : null;
    }
    if (style == 'opacity') return value ? parseFloat(value) : 1.0;
    return value == 'auto' ? null : value;
  },

  getOpacity: function(element) {
    return $(element).getStyle('opacity');
  },

  setStyle: function(element, styles) {
    element = $(element);
    var elementStyle = element.style, match;
    if (Object.isString(styles)) {
      element.style.cssText += ';' + styles;
      return styles.include('opacity') ?
        element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
    }
    for (var property in styles)
      if (property == 'opacity') element.setOpacity(styles[property]);
      else
        elementStyle[(property == 'float' || property == 'cssFloat') ?
          (Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :
            property] = styles[property];

    return element;
  },

  setOpacity: function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1 || value === '') ? '' :
      (value < 0.00001) ? 0 : value;
    return element;
  },

  getDimensions: function(element) {
    element = $(element);
    var display = $(element).getStyle('display');
    if (display != 'none' && display != null) // Safari bug
      return {width: element.offsetWidth, height: element.offsetHeight};

    // All *Width and *Height properties give 0 on elements with display none,
    // so enable the element temporarily
    var els = element.style;
    var originalVisibility = els.visibility;
    var originalPosition = els.position;
    var originalDisplay = els.display;
    els.visibility = 'hidden';
    els.position = 'absolute';
    els.display = 'block';
    var originalWidth = element.clientWidth;
    var originalHeight = element.clientHeight;
    els.display = originalDisplay;
    els.position = originalPosition;
    els.visibility = originalVisibility;
    return {width: originalWidth, height: originalHeight};
  },

  makePositioned: function(element) {
    element = $(element);
    var pos = Element.getStyle(element, 'position');
    if (pos == 'static' || !pos) {
      element._madePositioned = true;
      element.style.position = 'relative';
      // Opera returns the offset relative to the positioning context, when an
      // element is position relative but top and left have not been defined
      if (window.opera) {
        element.style.top = 0;
        element.style.left = 0;
      }
    }
    return element;
  },

  undoPositioned: function(element) {
    element = $(element);
    if (element._madePositioned) {
      element._madePositioned = undefined;
      element.style.position =
        element.style.top =
        element.style.left =
        element.style.bottom =
        element.style.right = '';
    }
    return element;
  },

  makeClipping: function(element) {
    element = $(element);
    if (element._overflow) return element;
    element._overflow = Element.getStyle(element, 'overflow') || 'auto';
    if (element._overflow !== 'hidden')
      element.style.overflow = 'hidden';
    return element;
  },

  undoClipping: function(element) {
    element = $(element);
    if (!element._overflow) return element;
    element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
    element._overflow = null;
    return element;
  },

  cumulativeOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  positionedOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
      if (element) {
        if (element.tagName == 'BODY') break;
        var p = Element.getStyle(element, 'position');
        if (p !== 'static') break;
      }
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  absolutize: function(element) {
    element = $(element);
    if (element.getStyle('position') == 'absolute') return;
    // Position.prepare(); // To be done manually by Scripty when it needs it.

    var offsets = element.positionedOffset();
    var top     = offsets[1];
    var left    = offsets[0];
    var width   = element.clientWidth;
    var height  = element.clientHeight;

    element._originalLeft   = left - parseFloat(element.style.left  || 0);
    element._originalTop    = top  - parseFloat(element.style.top || 0);
    element._originalWidth  = element.style.width;
    element._originalHeight = element.style.height;

    element.style.position = 'absolute';
    element.style.top    = top + 'px';
    element.style.left   = left + 'px';
    element.style.width  = width + 'px';
    element.style.height = height + 'px';
    return element;
  },

  relativize: function(element) {
    element = $(element);
    if (element.getStyle('position') == 'relative') return;
    // Position.prepare(); // To be done manually by Scripty when it needs it.

    element.style.position = 'relative';
    var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
    var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);

    element.style.top    = top + 'px';
    element.style.left   = left + 'px';
    element.style.height = element._originalHeight;
    element.style.width  = element._originalWidth;
    return element;
  },

  cumulativeScrollOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.scrollTop  || 0;
      valueL += element.scrollLeft || 0;
      element = element.parentNode;
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  getOffsetParent: function(element) {
    if (element.offsetParent) return $(element.offsetParent);
    if (element == document.body) return $(element);

    while ((element = element.parentNode) && element != document.body)
      if (Element.getStyle(element, 'position') != 'static')
        return $(element);

    return $(document.body);
  },

  viewportOffset: function(forElement) {
    var valueT = 0, valueL = 0;

    var element = forElement;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;

      // Safari fix
      if (element.offsetParent == document.body &&
        Element.getStyle(element, 'position') == 'absolute') break;

    } while (element = element.offsetParent);

    element = forElement;
    do {
      if (!Prototype.Browser.Opera || element.tagName == 'BODY') {
        valueT -= element.scrollTop  || 0;
        valueL -= element.scrollLeft || 0;
      }
    } while (element = element.parentNode);

    return Element._returnOffset(valueL, valueT);
  },

  clonePosition: function(element, source) {
    var options = Object.extend({
      setLeft:    true,
      setTop:     true,
      setWidth:   true,
      setHeight:  true,
      offsetTop:  0,
      offsetLeft: 0
    }, arguments[2] || { });

    // find page position of source
    source = $(source);
    var p = source.viewportOffset();

    // find coordinate system to use
    element = $(element);
    var delta = [0, 0];
    var parent = null;
    // delta [0,0] will do fine with position: fixed elements,
    // position:absolute needs offsetParent deltas
    if (Element.getStyle(element, 'position') == 'absolute') {
      parent = element.getOffsetParent();
      delta = parent.viewportOffset();
    }

    // correct by body offsets (fixes Safari)
    if (parent == document.body) {
      delta[0] -= document.body.offsetLeft;
      delta[1] -= document.body.offsetTop;
    }

    // set position
    if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
    if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
    if (options.setWidth)  element.style.width = source.offsetWidth + 'px';
    if (options.setHeight) element.style.height = source.offsetHeight + 'px';
    return element;
  }
};

Element.Methods.identify.counter = 1;

Object.extend(Element.Methods, {
  getElementsBySelector: Element.Methods.select,
  childElements: Element.Methods.immediateDescendants
});

Element._attributeTranslations = {
  write: {
    names: {
      className: 'class',
      htmlFor:   'for'
    },
    values: { }
  }
};

if (Prototype.Browser.Opera) {
  Element.Methods.getStyle = Element.Methods.getStyle.wrap(
    function(proceed, element, style) {
      switch (style) {
        case 'left': case 'top': case 'right': case 'bottom':
          if (proceed(element, 'position') === 'static') return null;
        case 'height': case 'width':
          // returns '0px' for hidden elements; we want it to return null
          if (!Element.visible(element)) return null;

          // returns the border-box dimensions rather than the content-box
          // dimensions, so we subtract padding and borders from the value
          var dim = parseInt(proceed(element, style), 10);

          if (dim !== element['offset' + style.capitalize()])
            return dim + 'px';

          var properties;
          if (style === 'height') {
            properties = ['border-top-width', 'padding-top',
             'padding-bottom', 'border-bottom-width'];
          }
          else {
            properties = ['border-left-width', 'padding-left',
             'padding-right', 'border-right-width'];
          }
          return properties.inject(dim, function(memo, property) {
            var val = proceed(element, property);
            return val === null ? memo : memo - parseInt(val, 10);
          }) + 'px';
        default: return proceed(element, style);
      }
    }
  );

  Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(
    function(proceed, element, attribute) {
      if (attribute === 'title') return element.title;
      return proceed(element, attribute);
    }
  );
}

else if (Prototype.Browser.IE) {
  // IE doesn't report offsets correctly for static elements, so we change them
  // to "relative" to get the values, then change them back.
  Element.Methods.getOffsetParent = Element.Methods.getOffsetParent.wrap(
    function(proceed, element) {
      element = $(element);
      var position = element.getStyle('position');
      if (position !== 'static') return proceed(element);
      element.setStyle({ position: 'relative' });
      var value = proceed(element);
      element.setStyle({ position: position });
      return value;
    }
  );

  $w('positionedOffset viewportOffset').each(function(method) {
    Element.Methods[method] = Element.Methods[method].wrap(
      function(proceed, element) {
        element = $(element);
        var position = element.getStyle('position');
        if (position !== 'static') return proceed(element);
        // Trigger hasLayout on the offset parent so that IE6 reports
        // accurate offsetTop and offsetLeft values for position: fixed.
        var offsetParent = element.getOffsetParent();
        if (offsetParent && offsetParent.getStyle('position') === 'fixed')
          offsetParent.setStyle({ zoom: 1 });
        element.setStyle({ position: 'relative' });
        var value = proceed(element);
        element.setStyle({ position: position });
        return value;
      }
    );
  });

  Element.Methods.getStyle = function(element, style) {
    element = $(element);
    style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
    var value = element.style[style];
    if (!value && element.currentStyle) value = element.currentStyle[style];

    if (style == 'opacity') {
      if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
        if (value[1]) return parseFloat(value[1]) / 100;
      return 1.0;
    }

    if (value == 'auto') {
      if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
        return element['offset' + style.capitalize()] + 'px';
      return null;
    }
    return value;
  };

  Element.Methods.setOpacity = function(element, value) {
    function stripAlpha(filter){
      return filter.replace(/alpha\([^\)]*\)/gi,'');
    }
    element = $(element);
    var currentStyle = element.currentStyle;
    if ((currentStyle && !currentStyle.hasLayout) ||
      (!currentStyle && element.style.zoom == 'normal'))
        element.style.zoom = 1;

    var filter = element.getStyle('filter'), style = element.style;
    if (value == 1 || value === '') {
      (filter = stripAlpha(filter)) ?
        style.filter = filter : style.removeAttribute('filter');
      return element;
    } else if (value < 0.00001) value = 0;
    style.filter = stripAlpha(filter) +
      'alpha(opacity=' + (value * 100) + ')';
    return element;
  };

  Element._attributeTranslations = {
    read: {
      names: {
        'class': 'className',
        'for':   'htmlFor'
      },
      values: {
        _getAttr: function(element, attribute) {
          return element.getAttribute(attribute, 2);
        },
        _getAttrNode: function(element, attribute) {
          var node = element.getAttributeNode(attribute);
          return node ? node.value : "";
        },
        _getEv: function(element, attribute) {
          attribute = element.getAttribute(attribute);
          return attribute ? attribute.toString().slice(23, -2) : null;
        },
        _flag: function(element, attribute) {
          return $(element).hasAttribute(attribute) ? attribute : null;
        },
        style: function(element) {
          return element.style.cssText.toLowerCase();
        },
        title: function(element) {
          return element.title;
        }
      }
    }
  };

  Element._attributeTranslations.write = {
    names: Object.extend({
      cellpadding: 'cellPadding',
      cellspacing: 'cellSpacing'
    }, Element._attributeTranslations.read.names),
    values: {
      checked: function(element, value) {
        element.checked = !!value;
      },

      style: function(element, value) {
        element.style.cssText = value ? value : '';
      }
    }
  };

  Element._attributeTranslations.has = {};

  $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
      'encType maxLength readOnly longDesc').each(function(attr) {
    Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
    Element._attributeTranslations.has[attr.toLowerCase()] = attr;
  });

  (function(v) {
    Object.extend(v, {
      href:        v._getAttr,
      src:         v._getAttr,
      type:        v._getAttr,
      action:      v._getAttrNode,
      disabled:    v._flag,
      checked:     v._flag,
      readonly:    v._flag,
      multiple:    v._flag,
      onload:      v._getEv,
      onunload:    v._getEv,
      onclick:     v._getEv,
      ondblclick:  v._getEv,
      onmousedown: v._getEv,
      onmouseup:   v._getEv,
      onmouseover: v._getEv,
      onmousemove: v._getEv,
      onmouseout:  v._getEv,
      onfocus:     v._getEv,
      onblur:      v._getEv,
      onkeypress:  v._getEv,
      onkeydown:   v._getEv,
      onkeyup:     v._getEv,
      onsubmit:    v._getEv,
      onreset:     v._getEv,
      onselect:    v._getEv,
      onchange:    v._getEv
    });
  })(Element._attributeTranslations.read.values);
}

else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
  Element.Methods.setOpacity = function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1) ? 0.999999 :
      (value === '') ? '' : (value < 0.00001) ? 0 : value;
    return element;
  };
}

else if (Prototype.Browser.WebKit) {
  Element.Methods.setOpacity = function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1 || value === '') ? '' :
      (value < 0.00001) ? 0 : value;

    if (value == 1)
      if(element.tagName == 'IMG' && element.width) {
        element.width++; element.width--;
      } else try {
        var n = document.createTextNode(' ');
        element.appendChild(n);
        element.removeChild(n);
      } catch (e) { }

    return element;
  };

  // Safari returns margins on body which is incorrect if the child is absolutely
  // positioned.  For performance reasons, redefine Element#cumulativeOffset for
  // KHTML/WebKit only.
  Element.Methods.cumulativeOffset = function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      if (element.offsetParent == document.body)
        if (Element.getStyle(element, 'position') == 'absolute') break;

      element = element.offsetParent;
    } while (element);

    return Element._returnOffset(valueL, valueT);
  };
}

if (Prototype.Browser.IE || Prototype.Browser.Opera) {
  // IE and Opera are missing .innerHTML support for TABLE-related and SELECT elements
  Element.Methods.update = function(element, content) {
    element = $(element);

    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) return element.update().insert(content);

    content = Object.toHTML(content);
    var tagName = element.tagName.toUpperCase();

    if (tagName in Element._insertionTranslations.tags) {
      $A(element.childNodes).each(function(node) { element.removeChild(node) });
      Element._getContentFromAnonymousElement(tagName, content.stripScripts())
        .each(function(node) { element.appendChild(node) });
    }
    else element.innerHTML = content.stripScripts();

    content.evalScripts.bind(content).defer();
    return element;
  };
}

if ('outerHTML' in document.createElement('div')) {
  Element.Methods.replace = function(element, content) {
    element = $(element);

    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) {
      element.parentNode.replaceChild(content, element);
      return element;
    }

    content = Object.toHTML(content);
    var parent = element.parentNode, tagName = parent.tagName.toUpperCase();

    if (Element._insertionTranslations.tags[tagName]) {
      var nextSibling = element.next();
      var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
      parent.removeChild(element);
      if (nextSibling)
        fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
      else
        fragments.each(function(node) { parent.appendChild(node) });
    }
    else element.outerHTML = content.stripScripts();

    content.evalScripts.bind(content).defer();
    return element;
  };
}

Element._returnOffset = function(l, t) {
  var result = [l, t];
  result.left = l;
  result.top = t;
  return result;
};

Element._getContentFromAnonymousElement = function(tagName, html) {
  var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
  if (t) {
    div.innerHTML = t[0] + html + t[1];
    t[2].times(function() { div = div.firstChild });
  } else div.innerHTML = html;
  return $A(div.childNodes);
};

Element._insertionTranslations = {
  before: function(element, node) {
    element.parentNode.insertBefore(node, element);
  },
  top: function(element, node) {
    element.insertBefore(node, element.firstChild);
  },
  bottom: function(element, node) {
    element.appendChild(node);
  },
  after: function(element, node) {
    element.parentNode.insertBefore(node, element.nextSibling);
  },
  tags: {
    TABLE:  ['<table>',                '</table>',                   1],
    TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
    TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
    TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
    SELECT: ['<select>',               '</select>',                  1]
  }
};

(function() {
  Object.extend(this.tags, {
    THEAD: this.tags.TBODY,
    TFOOT: this.tags.TBODY,
    TH:    this.tags.TD
  });
}).call(Element._insertionTranslations);

Element.Methods.Simulated = {
  hasAttribute: function(element, attribute) {
    attribute = Element._attributeTranslations.has[attribute] || attribute;
    var node = $(element).getAttributeNode(attribute);
    return node && node.specified;
  }
};

Element.Methods.ByTag = { };

Object.extend(Element, Element.Methods);

if (!Prototype.BrowserFeatures.ElementExtensions &&
    document.createElement('div').__proto__) {
  window.HTMLElement = { };
  window.HTMLElement.prototype = document.createElement('div').__proto__;
  Prototype.BrowserFeatures.ElementExtensions = true;
}

Element.extend = (function() {
  if (Prototype.BrowserFeatures.SpecificElementExtensions)
    return Prototype.K;

  var Methods = { }, ByTag = Element.Methods.ByTag;

  var extend = Object.extend(function(element) {
    if (!element || element._extendedByPrototype ||
        element.nodeType != 1 || element == window) return element;

    var methods = Object.clone(Methods),
      tagName = element.tagName, property, value;

    // extend methods for specific tags
    if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);

    for (property in methods) {
      value = methods[property];
      if (Object.isFunction(value) && !(property in element))
        element[property] = value.methodize();
    }

    element._extendedByPrototype = Prototype.emptyFunction;
    return element;

  }, {
    refresh: function() {
      // extend methods for all tags (Safari doesn't need this)
      if (!Prototype.BrowserFeatures.ElementExtensions) {
        Object.extend(Methods, Element.Methods);
        Object.extend(Methods, Element.Methods.Simulated);
      }
    }
  });

  extend.refresh();
  return extend;
})();

Element.hasAttribute = function(element, attribute) {
  if (element.hasAttribute) return element.hasAttribute(attribute);
  return Element.Methods.Simulated.hasAttribute(element, attribute);
};

Element.addMethods = function(methods) {
  var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;

  if (!methods) {
    Object.extend(Form, Form.Methods);
    Object.extend(Form.Element, Form.Element.Methods);
    Object.extend(Element.Methods.ByTag, {
      "FORM":     Object.clone(Form.Methods),
      "INPUT":    Object.clone(Form.Element.Methods),
      "SELECT":   Object.clone(Form.Element.Methods),
      "TEXTAREA": Object.clone(Form.Element.Methods)
    });
  }

  if (arguments.length == 2) {
    var tagName = methods;
    methods = arguments[1];
  }

  if (!tagName) Object.extend(Element.Methods, methods || { });
  else {
    if (Object.isArray(tagName)) tagName.each(extend);
    else extend(tagName);
  }

  function extend(tagName) {
    tagName = tagName.toUpperCase();
    if (!Element.Methods.ByTag[tagName])
      Element.Methods.ByTag[tagName] = { };
    Object.extend(Element.Methods.ByTag[tagName], methods);
  }

  function copy(methods, destination, onlyIfAbsent) {
    onlyIfAbsent = onlyIfAbsent || false;
    for (var property in methods) {
      var value = methods[property];
      if (!Object.isFunction(value)) continue;
      if (!onlyIfAbsent || !(property in destination))
        destination[property] = value.methodize();
    }
  }

  function findDOMClass(tagName) {
    var klass;
    var trans = {
      "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
      "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
      "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
      "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
      "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
      "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
      "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
      "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
      "FrameSet", "IFRAME": "IFrame"
    };
    if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
    if (window[klass]) return window[klass];
    klass = 'HTML' + tagName + 'Element';
    if (window[klass]) return window[klass];
    klass = 'HTML' + tagName.capitalize() + 'Element';
    if (window[klass]) return window[klass];

    window[klass] = { };
    window[klass].prototype = document.createElement(tagName).__proto__;
    return window[klass];
  }

  if (F.ElementExtensions) {
    copy(Element.Methods, HTMLElement.prototype);
    copy(Element.Methods.Simulated, HTMLElement.prototype, true);
  }

  if (F.SpecificElementExtensions) {
    for (var tag in Element.Methods.ByTag) {
      var klass = findDOMClass(tag);
      if (Object.isUndefined(klass)) continue;
      copy(T[tag], klass.prototype);
    }
  }

  Object.extend(Element, Element.Methods);
  delete Element.ByTag;

  if (Element.extend.refresh) Element.extend.refresh();
  Element.cache = { };
};

document.viewport = {
  getDimensions: function() {
    var dimensions = { };
    var B = Prototype.Browser;
    $w('width height').each(function(d) {
      var D = d.capitalize();
      dimensions[d] = (B.WebKit && !document.evaluate) ? self['inner' + D] :
        (B.Opera) ? document.body['client' + D] : document.documentElement['client' + D];
    });
    return dimensions;
  },

  getWidth: function() {
    return this.getDimensions().width;
  },

  getHeight: function() {
    return this.getDimensions().height;
  },

  getScrollOffsets: function() {
    return Element._returnOffset(
      window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
      window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop);
  }
};
/* Portions of the Selector class are derived from Jack Slocumâ€™s DomQuery,
 * part of YUI-Ext version 0.40, distributed under the terms of an MIT-style
 * license.  Please see http://www.yui-ext.com/ for more information. */

var Selector = Class.create({
  initialize: function(expression) {
    this.expression = expression.strip();
    this.compileMatcher();
  },

  shouldUseXPath: function() {
    if (!Prototype.BrowserFeatures.XPath) return false;

    var e = this.expression;

    // Safari 3 chokes on :*-of-type and :empty
    if (Prototype.Browser.WebKit &&
     (e.include("-of-type") || e.include(":empty")))
      return false;

    // XPath can't do namespaced attributes, nor can it read
    // the "checked" property from DOM nodes
    if ((/(\[[\w-]*?:|:checked)/).test(this.expression))
      return false;

    return true;
  },

  compileMatcher: function() {
    if (this.shouldUseXPath())
      return this.compileXPathMatcher();

    var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
        c = Selector.criteria, le, p, m;

    if (Selector._cache[e]) {
      this.matcher = Selector._cache[e];
      return;
    }

    this.matcher = ["this.matcher = function(root) {",
                    "var r = root, h = Selector.handlers, c = false, n;"];

    while (e && le != e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        p = ps[i];
        if (m = e.match(p)) {
          this.matcher.push(Object.isFunction(c[i]) ? c[i](m) :
    	      new Template(c[i]).evaluate(m));
          e = e.replace(m[0], '');
          break;
        }
      }
    }

    this.matcher.push("return h.unique(n);\n}");
    eval(this.matcher.join('\n'));
    Selector._cache[this.expression] = this.matcher;
  },

  compileXPathMatcher: function() {
    var e = this.expression, ps = Selector.patterns,
        x = Selector.xpath, le, m;

    if (Selector._cache[e]) {
      this.xpath = Selector._cache[e]; return;
    }

    this.matcher = ['.//*'];
    while (e && le != e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        if (m = e.match(ps[i])) {
          this.matcher.push(Object.isFunction(x[i]) ? x[i](m) :
            new Template(x[i]).evaluate(m));
          e = e.replace(m[0], '');
          break;
        }
      }
    }

    this.xpath = this.matcher.join('');
    Selector._cache[this.expression] = this.xpath;
  },

  findElements: function(root) {
    root = root || document;
    if (this.xpath) return document._getElementsByXPath(this.xpath, root);
    return this.matcher(root);
  },

  match: function(element) {
    this.tokens = [];

    var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
    var le, p, m;

    while (e && le !== e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        p = ps[i];
        if (m = e.match(p)) {
          // use the Selector.assertions methods unless the selector
          // is too complex.
          if (as[i]) {
            this.tokens.push([i, Object.clone(m)]);
            e = e.replace(m[0], '');
          } else {
            // reluctantly do a document-wide search
            // and look for a match in the array
            return this.findElements(document).include(element);
          }
        }
      }
    }

    var match = true, name, matches;
    for (var i = 0, token; token = this.tokens[i]; i++) {
      name = token[0], matches = token[1];
      if (!Selector.assertions[name](element, matches)) {
        match = false; break;
      }
    }

    return match;
  },

  toString: function() {
    return this.expression;
  },

  inspect: function() {
    return "#<Selector:" + this.expression.inspect() + ">";
  }
});

Object.extend(Selector, {
  _cache: { },

  xpath: {
    descendant:   "//*",
    child:        "/*",
    adjacent:     "/following-sibling::*[1]",
    laterSibling: '/following-sibling::*',
    tagName:      function(m) {
      if (m[1] == '*') return '';
      return "[local-name()='" + m[1].toLowerCase() +
             "' or local-name()='" + m[1].toUpperCase() + "']";
    },
    className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",
    id:           "[@id='#{1}']",
    attrPresence: function(m) {
      m[1] = m[1].toLowerCase();
      return new Template("[@#{1}]").evaluate(m);
    },
    attr: function(m) {
      m[1] = m[1].toLowerCase();
      m[3] = m[5] || m[6];
      return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
    },
    pseudo: function(m) {
      var h = Selector.xpath.pseudos[m[1]];
      if (!h) return '';
      if (Object.isFunction(h)) return h(m);
      return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
    },
    operators: {
      '=':  "[@#{1}='#{3}']",
      '!=': "[@#{1}!='#{3}']",
      '^=': "[starts-with(@#{1}, '#{3}')]",
      '$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
      '*=': "[contains(@#{1}, '#{3}')]",
      '~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
      '|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
    },
    pseudos: {
      'first-child': '[not(preceding-sibling::*)]',
      'last-child':  '[not(following-sibling::*)]',
      'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',
      'empty':       "[count(*) = 0 and (count(text()) = 0 or translate(text(), ' \t\r\n', '') = '')]",
      'checked':     "[@checked]",
      'disabled':    "[@disabled]",
      'enabled':     "[not(@disabled)]",
      'not': function(m) {
        var e = m[6], p = Selector.patterns,
            x = Selector.xpath, le, v;

        var exclusion = [];
        while (e && le != e && (/\S/).test(e)) {
          le = e;
          for (var i in p) {
            if (m = e.match(p[i])) {
              v = Object.isFunction(x[i]) ? x[i](m) : new Template(x[i]).evaluate(m);
              exclusion.push("(" + v.substring(1, v.length - 1) + ")");
              e = e.replace(m[0], '');
              break;
            }
          }
        }
        return "[not(" + exclusion.join(" and ") + ")]";
      },
      'nth-child':      function(m) {
        return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
      },
      'nth-last-child': function(m) {
        return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
      },
      'nth-of-type':    function(m) {
        return Selector.xpath.pseudos.nth("position() ", m);
      },
      'nth-last-of-type': function(m) {
        return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
      },
      'first-of-type':  function(m) {
        m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
      },
      'last-of-type':   function(m) {
        m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
      },
      'only-of-type':   function(m) {
        var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
      },
      nth: function(fragment, m) {
        var mm, formula = m[6], predicate;
        if (formula == 'even') formula = '2n+0';
        if (formula == 'odd')  formula = '2n+1';
        if (mm = formula.match(/^(\d+)$/)) // digit only
          return '[' + fragment + "= " + mm[1] + ']';
        if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
          if (mm[1] == "-") mm[1] = -1;
          var a = mm[1] ? Number(mm[1]) : 1;
          var b = mm[2] ? Number(mm[2]) : 0;
          predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +
          "((#{fragment} - #{b}) div #{a} >= 0)]";
          return new Template(predicate).evaluate({
            fragment: fragment, a: a, b: b });
        }
      }
    }
  },

  criteria: {
    tagName:      'n = h.tagName(n, r, "#{1}", c);      c = false;',
    className:    'n = h.className(n, r, "#{1}", c);    c = false;',
    id:           'n = h.id(n, r, "#{1}", c);           c = false;',
    attrPresence: 'n = h.attrPresence(n, r, "#{1}", c); c = false;',
    attr: function(m) {
      m[3] = (m[5] || m[6]);
      return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;').evaluate(m);
    },
    pseudo: function(m) {
      if (m[6]) m[6] = m[6].replace(/"/g, '\\"');
      return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);
    },
    descendant:   'c = "descendant";',
    child:        'c = "child";',
    adjacent:     'c = "adjacent";',
    laterSibling: 'c = "laterSibling";'
  },

  patterns: {
    // combinators must be listed first
    // (and descendant needs to be last combinator)
    laterSibling: /^\s*~\s*/,
    child:        /^\s*>\s*/,
    adjacent:     /^\s*\+\s*/,
    descendant:   /^\s/,

    // selectors follow
    tagName:      /^\s*(\*|[\w\-]+)(\b|$)?/,
    id:           /^#([\w\-\*]+)(\b|$)/,
    className:    /^\.([\w\-\*]+)(\b|$)/,
    pseudo:
/^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/,
    attrPresence: /^\[([\w]+)\]/,
    attr:         /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
  },

  // for Selector.match and Element#match
  assertions: {
    tagName: function(element, matches) {
      return matches[1].toUpperCase() == element.tagName.toUpperCase();
    },

    className: function(element, matches) {
      return Element.hasClassName(element, matches[1]);
    },

    id: function(element, matches) {
      return element.id === matches[1];
    },

    attrPresence: function(element, matches) {
      return Element.hasAttribute(element, matches[1]);
    },

    attr: function(element, matches) {
      var nodeValue = Element.readAttribute(element, matches[1]);
      return nodeValue && Selector.operators[matches[2]](nodeValue, matches[5] || matches[6]);
    }
  },

  handlers: {
    // UTILITY FUNCTIONS
    // joins two collections
    concat: function(a, b) {
      for (var i = 0, node; node = b[i]; i++)
        a.push(node);
      return a;
    },

    // marks an array of nodes for counting
    mark: function(nodes) {
      var _true = Prototype.emptyFunction;
      for (var i = 0, node; node = nodes[i]; i++)
        node._countedByPrototype = _true;
      return nodes;
    },

    unmark: function(nodes) {
      for (var i = 0, node; node = nodes[i]; i++)
        node._countedByPrototype = undefined;
      return nodes;
    },

    // mark each child node with its position (for nth calls)
    // "ofType" flag indicates whether we're indexing for nth-of-type
    // rather than nth-child
    index: function(parentNode, reverse, ofType) {
      parentNode._countedByPrototype = Prototype.emptyFunction;
      if (reverse) {
        for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
          var node = nodes[i];
          if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
        }
      } else {
        for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
          if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
      }
    },

    // filters out duplicates and extends all nodes
    unique: function(nodes) {
      if (nodes.length == 0) return nodes;
      var results = [], n;
      for (var i = 0, l = nodes.length; i < l; i++)
        if (!(n = nodes[i])._countedByPrototype) {
          n._countedByPrototype = Prototype.emptyFunction;
          results.push(Element.extend(n));
        }
      return Selector.handlers.unmark(results);
    },

    // COMBINATOR FUNCTIONS
    descendant: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        h.concat(results, node.getElementsByTagName('*'));
      return results;
    },

    child: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        for (var j = 0, child; child = node.childNodes[j]; j++)
          if (child.nodeType == 1 && child.tagName != '!') results.push(child);
      }
      return results;
    },

    adjacent: function(nodes) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        var next = this.nextElementSibling(node);
        if (next) results.push(next);
      }
      return results;
    },

    laterSibling: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        h.concat(results, Element.nextSiblings(node));
      return results;
    },

    nextElementSibling: function(node) {
      while (node = node.nextSibling)
	      if (node.nodeType == 1) return node;
      return null;
    },

    previousElementSibling: function(node) {
      while (node = node.previousSibling)
        if (node.nodeType == 1) return node;
      return null;
    },

    // TOKEN FUNCTIONS
    tagName: function(nodes, root, tagName, combinator) {
      var uTagName = tagName.toUpperCase();
      var results = [], h = Selector.handlers;
      if (nodes) {
        if (combinator) {
          // fastlane for ordinary descendant combinators
          if (combinator == "descendant") {
            for (var i = 0, node; node = nodes[i]; i++)
              h.concat(results, node.getElementsByTagName(tagName));
            return results;
          } else nodes = this[combinator](nodes);
          if (tagName == "*") return nodes;
        }
        for (var i = 0, node; node = nodes[i]; i++)
          if (node.tagName.toUpperCase() === uTagName) results.push(node);
        return results;
      } else return root.getElementsByTagName(tagName);
    },

    id: function(nodes, root, id, combinator) {
      var targetNode = $(id), h = Selector.handlers;
      if (!targetNode) return [];
      if (!nodes && root == document) return [targetNode];
      if (nodes) {
        if (combinator) {
          if (combinator == 'child') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (targetNode.parentNode == node) return [targetNode];
          } else if (combinator == 'descendant') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (Element.descendantOf(targetNode, node)) return [targetNode];
          } else if (combinator == 'adjacent') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (Selector.handlers.previousElementSibling(targetNode) == node)
                return [targetNode];
          } else nodes = h[combinator](nodes);
        }
        for (var i = 0, node; node = nodes[i]; i++)
          if (node == targetNode) return [targetNode];
        return [];
      }
      return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
    },

    className: function(nodes, root, className, combinator) {
      if (nodes && combinator) nodes = this[combinator](nodes);
      return Selector.handlers.byClassName(nodes, root, className);
    },

    byClassName: function(nodes, root, className) {
      if (!nodes) nodes = Selector.handlers.descendant([root]);
      var needle = ' ' + className + ' ';
      for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
        nodeClassName = node.className;
        if (nodeClassName.length == 0) continue;
        if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
          results.push(node);
      }
      return results;
    },

    attrPresence: function(nodes, root, attr, combinator) {
      if (!nodes) nodes = root.getElementsByTagName("*");
      if (nodes && combinator) nodes = this[combinator](nodes);
      var results = [];
      for (var i = 0, node; node = nodes[i]; i++)
        if (Element.hasAttribute(node, attr)) results.push(node);
      return results;
    },

    attr: function(nodes, root, attr, value, operator, combinator) {
      if (!nodes) nodes = root.getElementsByTagName("*");
      if (nodes && combinator) nodes = this[combinator](nodes);
      var handler = Selector.operators[operator], results = [];
      for (var i = 0, node; node = nodes[i]; i++) {
        var nodeValue = Element.readAttribute(node, attr);
        if (nodeValue === null) continue;
        if (handler(nodeValue, value)) results.push(node);
      }
      return results;
    },

    pseudo: function(nodes, name, value, root, combinator) {
      if (nodes && combinator) nodes = this[combinator](nodes);
      if (!nodes) nodes = root.getElementsByTagName("*");
      return Selector.pseudos[name](nodes, value, root);
    }
  },

  pseudos: {
    'first-child': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        if (Selector.handlers.previousElementSibling(node)) continue;
          results.push(node);
      }
      return results;
    },
    'last-child': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        if (Selector.handlers.nextElementSibling(node)) continue;
          results.push(node);
      }
      return results;
    },
    'only-child': function(nodes, value, root) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
          results.push(node);
      return results;
    },
    'nth-child':        function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root);
    },
    'nth-last-child':   function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, true);
    },
    'nth-of-type':      function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, false, true);
    },
    'nth-last-of-type': function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, true, true);
    },
    'first-of-type':    function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, "1", root, false, true);
    },
    'last-of-type':     function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, "1", root, true, true);
    },
    'only-of-type':     function(nodes, formula, root) {
      var p = Selector.pseudos;
      return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
    },

    // handles the an+b logic
    getIndices: function(a, b, total) {
      if (a == 0) return b > 0 ? [b] : [];
      return $R(1, total).inject([], function(memo, i) {
        if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);
        return memo;
      });
    },

    // handles nth(-last)-child, nth(-last)-of-type, and (first|last)-of-type
    nth: function(nodes, formula, root, reverse, ofType) {
      if (nodes.length == 0) return [];
      if (formula == 'even') formula = '2n+0';
      if (formula == 'odd')  formula = '2n+1';
      var h = Selector.handlers, results = [], indexed = [], m;
      h.mark(nodes);
      for (var i = 0, node; node = nodes[i]; i++) {
        if (!node.parentNode._countedByPrototype) {
          h.index(node.parentNode, reverse, ofType);
          indexed.push(node.parentNode);
        }
      }
      if (formula.match(/^\d+$/)) { // just a number
        formula = Number(formula);
        for (var i = 0, node; node = nodes[i]; i++)
          if (node.nodeIndex == formula) results.push(node);
      } else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
        if (m[1] == "-") m[1] = -1;
        var a = m[1] ? Number(m[1]) : 1;
        var b = m[2] ? Number(m[2]) : 0;
        var indices = Selector.pseudos.getIndices(a, b, nodes.length);
        for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {
          for (var j = 0; j < l; j++)
            if (node.nodeIndex == indices[j]) results.push(node);
        }
      }
      h.unmark(nodes);
      h.unmark(indexed);
      return results;
    },

    'empty': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        // IE treats comments as element nodes
        if (node.tagName == '!' || (node.firstChild && !node.innerHTML.match(/^\s*$/))) continue;
        results.push(node);
      }
      return results;
    },

    'not': function(nodes, selector, root) {
      var h = Selector.handlers, selectorType, m;
      var exclusions = new Selector(selector).findElements(root);
      h.mark(exclusions);
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!node._countedByPrototype) results.push(node);
      h.unmark(exclusions);
      return results;
    },

    'enabled': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!node.disabled) results.push(node);
      return results;
    },

    'disabled': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (node.disabled) results.push(node);
      return results;
    },

    'checked': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (node.checked) results.push(node);
      return results;
    }
  },

  operators: {
    '=':  function(nv, v) { return nv == v; },
    '!=': function(nv, v) { return nv != v; },
    '^=': function(nv, v) { return nv.startsWith(v); },
    '$=': function(nv, v) { return nv.endsWith(v); },
    '*=': function(nv, v) { return nv.include(v); },
    '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
    '|=': function(nv, v) { return ('-' + nv.toUpperCase() + '-').include('-' + v.toUpperCase() + '-'); }
  },

  split: function(expression) {
    var expressions = [];
    expression.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
      expressions.push(m[1].strip());
    });
    return expressions;
  },

  matchElements: function(elements, expression) {
    var matches = $$(expression), h = Selector.handlers;
    h.mark(matches);
    for (var i = 0, results = [], element; element = elements[i]; i++)
      if (element._countedByPrototype) results.push(element);
    h.unmark(matches);
    return results;
  },

  findElement: function(elements, expression, index) {
    if (Object.isNumber(expression)) {
      index = expression; expression = false;
    }
    return Selector.matchElements(elements, expression || '*')[index || 0];
  },

  findChildElements: function(element, expressions) {
    expressions = Selector.split(expressions.join(','));
    var results = [], h = Selector.handlers;
    for (var i = 0, l = expressions.length, selector; i < l; i++) {
      selector = new Selector(expressions[i].strip());
      h.concat(results, selector.findElements(element));
    }
    return (l > 1) ? h.unique(results) : results;
  }
});

if (Prototype.Browser.IE) {
  Object.extend(Selector.handlers, {
    // IE returns comment nodes on getElementsByTagName("*").
    // Filter them out.
    concat: function(a, b) {
      for (var i = 0, node; node = b[i]; i++)
        if (node.tagName !== "!") a.push(node);
      return a;
    },

    // IE improperly serializes _countedByPrototype in (inner|outer)HTML.
    unmark: function(nodes) {
      for (var i = 0, node; node = nodes[i]; i++)
        node.removeAttribute('_countedByPrototype');
      return nodes;
    }
  });
}

function $$() {
  return Selector.findChildElements(document, $A(arguments));
}
var Form = {
  reset: function(form) {
    $(form).reset();
    return form;
  },

  serializeElements: function(elements, options) {
    if (typeof options != 'object') options = { hash: !!options };
    else if (Object.isUndefined(options.hash)) options.hash = true;
    var key, value, submitted = false, submit = options.submit;

    var data = elements.inject({ }, function(result, element) {
      if (!element.disabled && element.name) {
        key = element.name; value = $(element).getValue();
        if (value != null && (element.type != 'submit' || (!submitted &&
            submit !== false && (!submit || key == submit) && (submitted = true)))) {
          if (key in result) {
            // a key is already present; construct an array of values
            if (!Object.isArray(result[key])) result[key] = [result[key]];
            result[key].push(value);
          }
          else result[key] = value;
        }
      }
      return result;
    });

    return options.hash ? data : Object.toQueryString(data);
  }
};

Form.Methods = {
  serialize: function(form, options) {
    return Form.serializeElements(Form.getElements(form), options);
  },

  getElements: function(form) {
    return $A($(form).getElementsByTagName('*')).inject([],
      function(elements, child) {
        if (Form.Element.Serializers[child.tagName.toLowerCase()])
          elements.push(Element.extend(child));
        return elements;
      }
    );
  },

  getInputs: function(form, typeName, name) {
    form = $(form);
    var inputs = form.getElementsByTagName('input');

    if (!typeName && !name) return $A(inputs).map(Element.extend);

    for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
      var input = inputs[i];
      if ((typeName && input.type != typeName) || (name && input.name != name))
        continue;
      matchingInputs.push(Element.extend(input));
    }

    return matchingInputs;
  },

  disable: function(form) {
    form = $(form);
    Form.getElements(form).invoke('disable');
    return form;
  },

  enable: function(form) {
    form = $(form);
    Form.getElements(form).invoke('enable');
    return form;
  },

  findFirstElement: function(form) {
    var elements = $(form).getElements().findAll(function(element) {
      return 'hidden' != element.type && !element.disabled;
    });
    var firstByIndex = elements.findAll(function(element) {
      return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
    }).sortBy(function(element) { return element.tabIndex }).first();

    return firstByIndex ? firstByIndex : elements.find(function(element) {
      return ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
    });
  },

  focusFirstElement: function(form) {
    form = $(form);
    form.findFirstElement().activate();
    return form;
  },

  request: function(form, options) {
    form = $(form), options = Object.clone(options || { });

    var params = options.parameters, action = form.readAttribute('action') || '';
    if (action.blank()) action = window.location.href;
    options.parameters = form.serialize(true);

    if (params) {
      if (Object.isString(params)) params = params.toQueryParams();
      Object.extend(options.parameters, params);
    }

    if (form.hasAttribute('method') && !options.method)
      options.method = form.method;

    return new Ajax.Request(action, options);
  }
};

/*--------------------------------------------------------------------------*/

Form.Element = {
  focus: function(element) {
    $(element).focus();
    return element;
  },

  select: function(element) {
    $(element).select();
    return element;
  }
};

Form.Element.Methods = {
  serialize: function(element) {
    element = $(element);
    if (!element.disabled && element.name) {
      var value = element.getValue();
      if (value != undefined) {
        var pair = { };
        pair[element.name] = value;
        return Object.toQueryString(pair);
      }
    }
    return '';
  },

  getValue: function(element) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    return Form.Element.Serializers[method](element);
  },

  setValue: function(element, value) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    Form.Element.Serializers[method](element, value);
    return element;
  },

  clear: function(element) {
    $(element).value = '';
    return element;
  },

  present: function(element) {
    return $(element).value != '';
  },

  activate: function(element) {
    element = $(element);
    try {
      element.focus();
      if (element.select && (element.tagName.toLowerCase() != 'input' ||
          !['button', 'reset', 'submit'].include(element.type)))
        element.select();
    } catch (e) { }
    return element;
  },

  disable: function(element) {
    element = $(element);
    element.blur();
    element.disabled = true;
    return element;
  },

  enable: function(element) {
    element = $(element);
    element.disabled = false;
    return element;
  }
};

/*--------------------------------------------------------------------------*/

var Field = Form.Element;
var $F = Form.Element.Methods.getValue;

/*--------------------------------------------------------------------------*/

Form.Element.Serializers = {
  input: function(element, value) {
    switch (element.type.toLowerCase()) {
      case 'checkbox':
      case 'radio':
        return Form.Element.Serializers.inputSelector(element, value);
      default:
        return Form.Element.Serializers.textarea(element, value);
    }
  },

  inputSelector: function(element, value) {
    if (Object.isUndefined(value)) return element.checked ? element.value : null;
    else element.checked = !!value;
  },

  textarea: function(element, value) {
    if (Object.isUndefined(value)) return element.value;
    else element.value = value;
  },

  select: function(element, index) {
    if (Object.isUndefined(index))
      return this[element.type == 'select-one' ?
        'selectOne' : 'selectMany'](element);
    else {
      var opt, value, single = !Object.isArray(index);
      for (var i = 0, length = element.length; i < length; i++) {
        opt = element.options[i];
        value = this.optionValue(opt);
        if (single) {
          if (value == index) {
            opt.selected = true;
            return;
          }
        }
        else opt.selected = index.include(value);
      }
    }
  },

  selectOne: function(element) {
    var index = element.selectedIndex;
    return index >= 0 ? this.optionValue(element.options[index]) : null;
  },

  selectMany: function(element) {
    var values, length = element.length;
    if (!length) return null;

    for (var i = 0, values = []; i < length; i++) {
      var opt = element.options[i];
      if (opt.selected) values.push(this.optionValue(opt));
    }
    return values;
  },

  optionValue: function(opt) {
    // extend element because hasAttribute may not be native
    return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
  }
};

/*--------------------------------------------------------------------------*/

Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
  initialize: function($super, element, frequency, callback) {
    $super(callback, frequency);
    this.element   = $(element);
    this.lastValue = this.getValue();
  },

  execute: function() {
    var value = this.getValue();
    if (Object.isString(this.lastValue) && Object.isString(value) ?
        this.lastValue != value : String(this.lastValue) != String(value)) {
      this.callback(this.element, value);
      this.lastValue = value;
    }
  }
});

Form.Element.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
    return Form.Element.getValue(this.element);
  }
});

Form.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
    return Form.serialize(this.element);
  }
});

/*--------------------------------------------------------------------------*/

Abstract.EventObserver = Class.create({
  initialize: function(element, callback) {
    this.element  = $(element);
    this.callback = callback;

    this.lastValue = this.getValue();
    if (this.element.tagName.toLowerCase() == 'form')
      this.registerFormCallbacks();
    else
      this.registerCallback(this.element);
  },

  onElementEvent: function() {
    var value = this.getValue();
    if (this.lastValue != value) {
      this.callback(this.element, value);
      this.lastValue = value;
    }
  },

  registerFormCallbacks: function() {
    Form.getElements(this.element).each(this.registerCallback, this);
  },

  registerCallback: function(element) {
    if (element.type) {
      switch (element.type.toLowerCase()) {
        case 'checkbox':
        case 'radio':
          Event.observe(element, 'click', this.onElementEvent.bind(this));
          break;
        default:
          Event.observe(element, 'change', this.onElementEvent.bind(this));
          break;
      }
    }
  }
});

Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
    return Form.Element.getValue(this.element);
  }
});

Form.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
    return Form.serialize(this.element);
  }
});
if (!window.Event) var Event = { };

Object.extend(Event, {
  KEY_BACKSPACE: 8,
  KEY_TAB:       9,
  KEY_RETURN:   13,
  KEY_ESC:      27,
  KEY_LEFT:     37,
  KEY_UP:       38,
  KEY_RIGHT:    39,
  KEY_DOWN:     40,
  KEY_DELETE:   46,
  KEY_HOME:     36,
  KEY_END:      35,
  KEY_PAGEUP:   33,
  KEY_PAGEDOWN: 34,
  KEY_INSERT:   45,

  cache: { },

  relatedTarget: function(event) {
    var element;
    switch(event.type) {
      case 'mouseover': element = event.fromElement; break;
      case 'mouseout':  element = event.toElement;   break;
      default: return null;
    }
    return Element.extend(element);
  }
});

Event.Methods = (function() {
  var isButton;

  if (Prototype.Browser.IE) {
    var buttonMap = { 0: 1, 1: 4, 2: 2 };
    isButton = function(event, code) {
      return event.button == buttonMap[code];
    };

  } else if (Prototype.Browser.WebKit) {
    isButton = function(event, code) {
      switch (code) {
        case 0: return event.which == 1 && !event.metaKey;
        case 1: return event.which == 1 && event.metaKey;
        default: return false;
      }
    };

  } else {
    isButton = function(event, code) {
      return event.which ? (event.which === code + 1) : (event.button === code);
    };
  }

  return {
    isLeftClick:   function(event) { return isButton(event, 0) },
    isMiddleClick: function(event) { return isButton(event, 1) },
    isRightClick:  function(event) { return isButton(event, 2) },

    element: function(event) {
      var node = Event.extend(event).target;
      return Element.extend(node.nodeType == Node.TEXT_NODE ? node.parentNode : node);
    },

    findElement: function(event, expression) {
      var element = Event.element(event);
      if (!expression) return element;
      var elements = [element].concat(element.ancestors());
      return Selector.findElement(elements, expression, 0);
    },

    pointer: function(event) {
      return {
        x: event.pageX || (event.clientX +
          (document.documentElement.scrollLeft || document.body.scrollLeft)),
        y: event.pageY || (event.clientY +
          (document.documentElement.scrollTop || document.body.scrollTop))
      };
    },

    pointerX: function(event) { return Event.pointer(event).x },
    pointerY: function(event) { return Event.pointer(event).y },

    stop: function(event) {
      Event.extend(event);
      event.preventDefault();
      event.stopPropagation();
      event.stopped = true;
    }
  };
})();

Event.extend = (function() {
  var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
    m[name] = Event.Methods[name].methodize();
    return m;
  });

  if (Prototype.Browser.IE) {
    Object.extend(methods, {
      stopPropagation: function() { this.cancelBubble = true },
      preventDefault:  function() { this.returnValue = false },
      inspect: function() { return "[object Event]" }
    });

    return function(event) {
      if (!event) return false;
      if (event._extendedByPrototype) return event;

      event._extendedByPrototype = Prototype.emptyFunction;
      var pointer = Event.pointer(event);
      Object.extend(event, {
        target: event.srcElement,
        relatedTarget: Event.relatedTarget(event),
        pageX:  pointer.x,
        pageY:  pointer.y
      });
      return Object.extend(event, methods);
    };

  } else {
    Event.prototype = Event.prototype || document.createEvent("HTMLEvents").__proto__;
    Object.extend(Event.prototype, methods);
    return Prototype.K;
  }
})();

Object.extend(Event, (function() {
  var cache = Event.cache;

  function getEventID(element) {
    if (element._prototypeEventID) return element._prototypeEventID[0];
    arguments.callee.id = arguments.callee.id || 1;
    return element._prototypeEventID = [++arguments.callee.id];
  }

  function getDOMEventName(eventName) {
    if (eventName && eventName.include(':')) return "dataavailable";
    return eventName;
  }

  function getCacheForID(id) {
    return cache[id] = cache[id] || { };
  }

  function getWrappersForEventName(id, eventName) {
    var c = getCacheForID(id);
    return c[eventName] = c[eventName] || [];
  }

  function createWrapper(element, eventName, handler) {
    var id = getEventID(element);
    var c = getWrappersForEventName(id, eventName);
    if (c.pluck("handler").include(handler)) return false;

    var wrapper = function(event) {
      if (!Event || !Event.extend ||
        (event.eventName && event.eventName != eventName))
          return false;

      Event.extend(event);
      handler.call(element, event);
    };

    wrapper.handler = handler;
    c.push(wrapper);
    return wrapper;
  }

  function findWrapper(id, eventName, handler) {
    var c = getWrappersForEventName(id, eventName);
    return c.find(function(wrapper) { return wrapper.handler == handler });
  }

  function destroyWrapper(id, eventName, handler) {
    var c = getCacheForID(id);
    if (!c[eventName]) return false;
    c[eventName] = c[eventName].without(findWrapper(id, eventName, handler));
  }

  function destroyCache() {
    for (var id in cache)
      for (var eventName in cache[id])
        cache[id][eventName] = null;
  }

  if (window.attachEvent) {
    window.attachEvent("onunload", destroyCache);
  }

  return {
    observe: function(element, eventName, handler) {
      element = $(element);
      var name = getDOMEventName(eventName);

      var wrapper = createWrapper(element, eventName, handler);
      if (!wrapper) return element;

      if (element.addEventListener) {
        element.addEventListener(name, wrapper, false);
      } else {
        element.attachEvent("on" + name, wrapper);
      }

      return element;
    },

    stopObserving: function(element, eventName, handler) {
      element = $(element);
      var id = getEventID(element), name = getDOMEventName(eventName);

      if (!handler && eventName) {
        getWrappersForEventName(id, eventName).each(function(wrapper) {
          element.stopObserving(eventName, wrapper.handler);
        });
        return element;

      } else if (!eventName) {
        Object.keys(getCacheForID(id)).each(function(eventName) {
          element.stopObserving(eventName);
        });
        return element;
      }

      var wrapper = findWrapper(id, eventName, handler);
      if (!wrapper) return element;

      if (element.removeEventListener) {
        element.removeEventListener(name, wrapper, false);
      } else {
        element.detachEvent("on" + name, wrapper);
      }

      destroyWrapper(id, eventName, handler);

      return element;
    },

    fire: function(element, eventName, memo) {
      element = $(element);
      if (element == document && document.createEvent && !element.dispatchEvent)
        element = document.documentElement;

      var event;
      if (document.createEvent) {
        event = document.createEvent("HTMLEvents");
        event.initEvent("dataavailable", true, true);
      } else {
        event = document.createEventObject();
        event.eventType = "ondataavailable";
      }

      event.eventName = eventName;
      event.memo = memo || { };

      if (document.createEvent) {
        element.dispatchEvent(event);
      } else {
        element.fireEvent(event.eventType, event);
      }

      return Event.extend(event);
    }
  };
})());

Object.extend(Event, Event.Methods);

Element.addMethods({
  fire:          Event.fire,
  observe:       Event.observe,
  stopObserving: Event.stopObserving
});

Object.extend(document, {
  fire:          Element.Methods.fire.methodize(),
  observe:       Element.Methods.observe.methodize(),
  stopObserving: Element.Methods.stopObserving.methodize(),
  loaded:        false
});

(function() {
  /* Support for the DOMContentLoaded event is based on work by Dan Webb,
     Matthias Miller, Dean Edwards and John Resig. */

  var timer;

  function fireContentLoadedEvent() {
    if (document.loaded) return;
    if (timer) window.clearInterval(timer);
    document.fire("dom:loaded");
    document.loaded = true;
  }

  if (document.addEventListener) {
    if (Prototype.Browser.WebKit) {
      timer = window.setInterval(function() {
        if (/loaded|complete/.test(document.readyState))
          fireContentLoadedEvent();
      }, 0);

      Event.observe(window, "load", fireContentLoadedEvent);

    } else {
      document.addEventListener("DOMContentLoaded",
        fireContentLoadedEvent, false);
    }

  } else {
    document.write("<script id=__onDOMContentLoaded defer src=//:><\/script>");
    $("__onDOMContentLoaded").onreadystatechange = function() {
      if (this.readyState == "complete") {
        this.onreadystatechange = null;
        fireContentLoadedEvent();
      }
    };
  }
})();
/*------------------------------- DEPRECATED -------------------------------*/

Hash.toQueryString = Object.toQueryString;

var Toggle = { display: Element.toggle };

Element.Methods.childOf = Element.Methods.descendantOf;

var Insertion = {
  Before: function(element, content) {
    return Element.insert(element, {before:content});
  },

  Top: function(element, content) {
    return Element.insert(element, {top:content});
  },

  Bottom: function(element, content) {
    return Element.insert(element, {bottom:content});
  },

  After: function(element, content) {
    return Element.insert(element, {after:content});
  }
};

var $continue = new Error('"throw $continue" is deprecated, use "return" instead');

// This should be moved to script.aculo.us; notice the deprecated methods
// further below, that map to the newer Element methods.
var Position = {
  // set to true if needed, warning: firefox performance problems
  // NOT neeeded for page scrolling, only if draggable contained in
  // scrollable elements
  includeScrollOffsets: false,

  // must be called before calling withinIncludingScrolloffset, every time the
  // page is scrolled
  prepare: function() {
    this.deltaX =  window.pageXOffset
                || document.documentElement.scrollLeft
                || document.body.scrollLeft
                || 0;
    this.deltaY =  window.pageYOffset
                || document.documentElement.scrollTop
                || document.body.scrollTop
                || 0;
  },

  // caches x/y coordinate pair to use with overlap
  within: function(element, x, y) {
    if (this.includeScrollOffsets)
      return this.withinIncludingScrolloffsets(element, x, y);
    this.xcomp = x;
    this.ycomp = y;
    this.offset = Element.cumulativeOffset(element);

    return (y >= this.offset[1] &&
            y <  this.offset[1] + element.offsetHeight &&
            x >= this.offset[0] &&
            x <  this.offset[0] + element.offsetWidth);
  },

  withinIncludingScrolloffsets: function(element, x, y) {
    var offsetcache = Element.cumulativeScrollOffset(element);

    this.xcomp = x + offsetcache[0] - this.deltaX;
    this.ycomp = y + offsetcache[1] - this.deltaY;
    this.offset = Element.cumulativeOffset(element);

    return (this.ycomp >= this.offset[1] &&
            this.ycomp <  this.offset[1] + element.offsetHeight &&
            this.xcomp >= this.offset[0] &&
            this.xcomp <  this.offset[0] + element.offsetWidth);
  },

  // within must be called directly before
  overlap: function(mode, element) {
    if (!mode) return 0;
    if (mode == 'vertical')
      return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
        element.offsetHeight;
    if (mode == 'horizontal')
      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
        element.offsetWidth;
  },

  // Deprecation layer -- use newer Element methods now (1.5.2).

  cumulativeOffset: Element.Methods.cumulativeOffset,

  positionedOffset: Element.Methods.positionedOffset,

  absolutize: function(element) {
    Position.prepare();
    return Element.absolutize(element);
  },

  relativize: function(element) {
    Position.prepare();
    return Element.relativize(element);
  },

  realOffset: Element.Methods.cumulativeScrollOffset,

  offsetParent: Element.Methods.getOffsetParent,

  page: Element.Methods.viewportOffset,

  clone: function(source, target, options) {
    options = options || { };
    return Element.clonePosition(target, source, options);
  }
};

/*--------------------------------------------------------------------------*/

if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
  function iter(name) {
    return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
  }

  instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
  function(element, className) {
    className = className.toString().strip();
    var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
    return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
  } : function(element, className) {
    className = className.toString().strip();
    var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
    if (!classNames && !className) return elements;

    var nodes = $(element).getElementsByTagName('*');
    className = ' ' + className + ' ';

    for (var i = 0, child, cn; child = nodes[i]; i++) {
      if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
          (classNames && classNames.all(function(name) {
            return !name.toString().blank() && cn.include(' ' + name + ' ');
          }))))
        elements.push(Element.extend(child));
    }
    return elements;
  };

  return function(className, parentElement) {
    return $(parentElement || document.body).getElementsByClassName(className);
  };
}(Element.Methods);

/*--------------------------------------------------------------------------*/

Element.ClassNames = Class.create();
Element.ClassNames.prototype = {
  initialize: function(element) {
    this.element = $(element);
  },

  _each: function(iterator) {
    this.element.className.split(/\s+/).select(function(name) {
      return name.length > 0;
    })._each(iterator);
  },

  set: function(className) {
    this.element.className = className;
  },

  add: function(classNameToAdd) {
    if (this.include(classNameToAdd)) return;
    this.set($A(this).concat(classNameToAdd).join(' '));
  },

  remove: function(classNameToRemove) {
    if (!this.include(classNameToRemove)) return;
    this.set($A(this).without(classNameToRemove).join(' '));
  },

  toString: function() {
    return $A(this).join(' ');
  }
};

Object.extend(Element.ClassNames.prototype, Enumerable);

/*--------------------------------------------------------------------------*/

Element.addMethods();// script.aculo.us scriptaculous.js v1.8.1, Thu Jan 03 22:07:12 -0500 2008

// Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
// 
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// For details, see the script.aculo.us web site: http://script.aculo.us/

var Scriptaculous = {
  Version: '1.8.1',
  require: function(libraryName) {
    // inserting via DOM fails in Safari 2.0, so brute force approach
    document.write('<script type="text/javascript" src="'+libraryName+'"><\/script>');
  },
  REQUIRED_PROTOTYPE: '1.6.0',
  load: function() {
    function convertVersionString(versionString){
      var r = versionString.split('.');
      return parseInt(r[0])*100000 + parseInt(r[1])*1000 + parseInt(r[2]);
    }
 
    if((typeof Prototype=='undefined') || 
       (typeof Element == 'undefined') || 
       (typeof Element.Methods=='undefined') ||
       (convertVersionString(Prototype.Version) < 
        convertVersionString(Scriptaculous.REQUIRED_PROTOTYPE)))
       throw("script.aculo.us requires the Prototype JavaScript framework >= " +
        Scriptaculous.REQUIRED_PROTOTYPE);
    
    $A(document.getElementsByTagName("script")).findAll( function(s) {
      return (s.src && s.src.match(/scriptaculous\.js(\?.*)?$/))
    }).each( function(s) {
      var path = s.src.replace(/scriptaculous\.js(\?.*)?$/,'');
      var includes = s.src.match(/\?.*load=([a-z,]*)/);
      (includes ? includes[1] : 'builder,effects,dragdrop,controls,slider,sound').split(',').each(
       function(include) { Scriptaculous.require(path+include+'.js') });
    });
  }
}

Scriptaculous.load();// script.aculo.us effects.js v1.8.1, Thu Jan 03 22:07:12 -0500 2008

// Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
// Contributors:
//  Justin Palmer (http://encytemedia.com/)
//  Mark Pilgrim (http://diveintomark.org/)
//  Martin Bialasinki
// 
// script.aculo.us is freely distributable under the terms of an MIT-style license.
// For details, see the script.aculo.us web site: http://script.aculo.us/ 

// converts rgb() and #xxx to #xxxxxx format,  
// returns self (or first argument) if not convertable  
String.prototype.parseColor = function() {  
  var color = '#';
  if (this.slice(0,4) == 'rgb(') {  
    var cols = this.slice(4,this.length-1).split(',');  
    var i=0; do { color += parseInt(cols[i]).toColorPart() } while (++i<3);  
  } else {  
    if (this.slice(0,1) == '#') {  
      if (this.length==4) for(var i=1;i<4;i++) color += (this.charAt(i) + this.charAt(i)).toLowerCase();  
      if (this.length==7) color = this.toLowerCase();  
    }  
  }  
  return (color.length==7 ? color : (arguments[0] || this));  
};

/*--------------------------------------------------------------------------*/

Element.collectTextNodes = function(element) {  
  return $A($(element).childNodes).collect( function(node) {
    return (node.nodeType==3 ? node.nodeValue : 
      (node.hasChildNodes() ? Element.collectTextNodes(node) : ''));
  }).flatten().join('');
};

Element.collectTextNodesIgnoreClass = function(element, className) {  
  return $A($(element).childNodes).collect( function(node) {
    return (node.nodeType==3 ? node.nodeValue : 
      ((node.hasChildNodes() && !Element.hasClassName(node,className)) ? 
        Element.collectTextNodesIgnoreClass(node, className) : ''));
  }).flatten().join('');
};

Element.setContentZoom = function(element, percent) {
  element = $(element);  
  element.setStyle({fontSize: (percent/100) + 'em'});   
  if (Prototype.Browser.WebKit) window.scrollBy(0,0);
  return element;
};

Element.getInlineOpacity = function(element){
  return $(element).style.opacity || '';
};

Element.forceRerendering = function(element) {
  try {
    element = $(element);
    var n = document.createTextNode(' ');
    element.appendChild(n);
    element.removeChild(n);
  } catch(e) { }
};

/*--------------------------------------------------------------------------*/

var Effect = {
  _elementDoesNotExistError: {
    name: 'ElementDoesNotExistError',
    message: 'The specified DOM element does not exist, but is required for this effect to operate'
  },
  Transitions: {
    linear: Prototype.K,
    sinoidal: function(pos) {
      return (-Math.cos(pos*Math.PI)/2) + 0.5;
    },
    reverse: function(pos) {
      return 1-pos;
    },
    flicker: function(pos) {
      var pos = ((-Math.cos(pos*Math.PI)/4) + 0.75) + Math.random()/4;
      return pos > 1 ? 1 : pos;
    },
    wobble: function(pos) {
      return (-Math.cos(pos*Math.PI*(9*pos))/2) + 0.5;
    },
    pulse: function(pos, pulses) { 
      pulses = pulses || 5; 
      return (
        ((pos % (1/pulses)) * pulses).round() == 0 ? 
              ((pos * pulses * 2) - (pos * pulses * 2).floor()) : 
          1 - ((pos * pulses * 2) - (pos * pulses * 2).floor())
        );
    },
    spring: function(pos) { 
      return 1 - (Math.cos(pos * 4.5 * Math.PI) * Math.exp(-pos * 6)); 
    },
    none: function(pos) {
      return 0;
    },
    full: function(pos) {
      return 1;
    }
  },
  DefaultOptions: {
    duration:   1.0,   // seconds
    fps:        100,   // 100= assume 66fps max.
    sync:       false, // true for combining
    from:       0.0,
    to:         1.0,
    delay:      0.0,
    queue:      'parallel'
  },
  tagifyText: function(element) {
    var tagifyStyle = 'position:relative';
    if (Prototype.Browser.IE) tagifyStyle += ';zoom:1';
    
    element = $(element);
    $A(element.childNodes).each( function(child) {
      if (child.nodeType==3) {
        child.nodeValue.toArray().each( function(character) {
          element.insertBefore(
            new Element('span', {style: tagifyStyle}).update(
              character == ' ' ? String.fromCharCode(160) : character), 
              child);
        });
        Element.remove(child);
      }
    });
  },
  multiple: function(element, effect) {
    var elements;
    if (((typeof element == 'object') || 
        Object.isFunction(element)) && 
       (element.length))
      elements = element;
    else
      elements = $(element).childNodes;
      
    var options = Object.extend({
      speed: 0.1,
      delay: 0.0
    }, arguments[2] || { });
    var masterDelay = options.delay;

    $A(elements).each( function(element, index) {
      new effect(element, Object.extend(options, { delay: index * options.speed + masterDelay }));
    });
  },
  PAIRS: {
    'slide':  ['SlideDown','SlideUp'],
    'blind':  ['BlindDown','BlindUp'],
    'appear': ['Appear','Fade']
  },
  toggle: function(element, effect) {
    element = $(element);
    effect = (effect || 'appear').toLowerCase();
    var options = Object.extend({
      queue: { position:'end', scope:(element.id || 'global'), limit: 1 }
    }, arguments[2] || { });
    Effect[element.visible() ? 
      Effect.PAIRS[effect][1] : Effect.PAIRS[effect][0]](element, options);
  }
};

Effect.DefaultOptions.transition = Effect.Transitions.sinoidal;

/* ------------- core effects ------------- */

Effect.ScopedQueue = Class.create(Enumerable, {
  initialize: function() {
    this.effects  = [];
    this.interval = null;    
  },
  _each: function(iterator) {
    this.effects._each(iterator);
  },
  add: function(effect) {
    var timestamp = new Date().getTime();
    
    var position = Object.isString(effect.options.queue) ? 
      effect.options.queue : effect.options.queue.position;
    
    switch(position) {
      case 'front':
        // move unstarted effects after this effect  
        this.effects.findAll(function(e){ return e.state=='idle' }).each( function(e) {
            e.startOn  += effect.finishOn;
            e.finishOn += effect.finishOn;
          });
        break;
      case 'with-last':
        timestamp = this.effects.pluck('startOn').max() || timestamp;
        break;
      case 'end':
        // start effect after last queued effect has finished
        timestamp = this.effects.pluck('finishOn').max() || timestamp;
        break;
    }
    
    effect.startOn  += timestamp;
    effect.finishOn += timestamp;

    if (!effect.options.queue.limit || (this.effects.length < effect.options.queue.limit))
      this.effects.push(effect);
    
    if (!this.interval)
      this.interval = setInterval(this.loop.bind(this), 15);
  },
  remove: function(effect) {
    this.effects = this.effects.reject(function(e) { return e==effect });
    if (this.effects.length == 0) {
      clearInterval(this.interval);
      this.interval = null;
    }
  },
  loop: function() {
    var timePos = new Date().getTime();
    for(var i=0, len=this.effects.length;i<len;i++) 
      this.effects[i] && this.effects[i].loop(timePos);
  }
});

Effect.Queues = {
  instances: $H(),
  get: function(queueName) {
    if (!Object.isString(queueName)) return queueName;
    
    return this.instances.get(queueName) ||
      this.instances.set(queueName, new Effect.ScopedQueue());
  }
};
Effect.Queue = Effect.Queues.get('global');

Effect.Base = Class.create({
  position: null,
  start: function(options) {
    function codeForEvent(options,eventName){
      return (
        (options[eventName+'Internal'] ? 'this.options.'+eventName+'Internal(this);' : '') +
        (options[eventName] ? 'this.options.'+eventName+'(this);' : '')
      );
    }
    if (options && options.transition === false) options.transition = Effect.Transitions.linear;
    this.options      = Object.extend(Object.extend({ },Effect.DefaultOptions), options || { });
    this.currentFrame = 0;
    this.state        = 'idle';
    this.startOn      = this.options.delay*1000;
    this.finishOn     = this.startOn+(this.options.duration*1000);
    this.fromToDelta  = this.options.to-this.options.from;
    this.totalTime    = this.finishOn-this.startOn;
    this.totalFrames  = this.options.fps*this.options.duration;
    
    eval('this.render = function(pos){ '+
      'if (this.state=="idle"){this.state="running";'+
      codeForEvent(this.options,'beforeSetup')+
      (this.setup ? 'this.setup();':'')+ 
      codeForEvent(this.options,'afterSetup')+
      '};if (this.state=="running"){'+
      'pos=this.options.transition(pos)*'+this.fromToDelta+'+'+this.options.from+';'+
      'this.position=pos;'+
      codeForEvent(this.options,'beforeUpdate')+
      (this.update ? 'this.update(pos);':'')+
      codeForEvent(this.options,'afterUpdate')+
      '}}');
    
    this.event('beforeStart');
    if (!this.options.sync)
      Effect.Queues.get(Object.isString(this.options.queue) ? 
        'global' : this.options.queue.scope).add(this);
  },
  loop: function(timePos) {
    if (timePos >= this.startOn) {
      if (timePos >= this.finishOn) {
        this.render(1.0);
        this.cancel();
        this.event('beforeFinish');
        if (this.finish) this.finish(); 
        this.event('afterFinish');
        return;  
      }
      var pos   = (timePos - this.startOn) / this.totalTime,
          frame = (pos * this.totalFrames).round();
      if (frame > this.currentFrame) {
        this.render(pos);
        this.currentFrame = frame;
      }
    }
  },
  cancel: function() {
    if (!this.options.sync)
      Effect.Queues.get(Object.isString(this.options.queue) ? 
        'global' : this.options.queue.scope).remove(this);
    this.state = 'finished';
  },
  event: function(eventName) {
    if (this.options[eventName + 'Internal']) this.options[eventName + 'Internal'](this);
    if (this.options[eventName]) this.options[eventName](this);
  },
  inspect: function() {
    var data = $H();
    for(property in this)
      if (!Object.isFunction(this[property])) data.set(property, this[property]);
    return '#<Effect:' + data.inspect() + ',options:' + $H(this.options).inspect() + '>';
  }
});

Effect.Parallel = Class.create(Effect.Base, {
  initialize: function(effects) {
    this.effects = effects || [];
    this.start(arguments[1]);
  },
  update: function(position) {
    this.effects.invoke('render', position);
  },
  finish: function(position) {
    this.effects.each( function(effect) {
      effect.render(1.0);
      effect.cancel();
      effect.event('beforeFinish');
      if (effect.finish) effect.finish(position);
      effect.event('afterFinish');
    });
  }
});

Effect.Tween = Class.create(Effect.Base, {
  initialize: function(object, from, to) {
    object = Object.isString(object) ? $(object) : object;
    var args = $A(arguments), method = args.last(), 
      options = args.length == 5 ? args[3] : null;
    this.method = Object.isFunction(method) ? method.bind(object) :
      Object.isFunction(object[method]) ? object[method].bind(object) : 
      function(value) { object[method] = value };
    this.start(Object.extend({ from: from, to: to }, options || { }));
  },
  update: function(position) {
    this.method(position);
  }
});

Effect.Event = Class.create(Effect.Base, {
  initialize: function() {
    this.start(Object.extend({ duration: 0 }, arguments[0] || { }));
  },
  update: Prototype.emptyFunction
});

Effect.Opacity = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    // make this work on IE on elements without 'layout'
    if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
      this.element.setStyle({zoom: 1});
    var options = Object.extend({
      from: this.element.getOpacity() || 0.0,
      to:   1.0
    }, arguments[1] || { });
    this.start(options);
  },
  update: function(position) {
    this.element.setOpacity(position);
  }
});

Effect.Move = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({
      x:    0,
      y:    0,
      mode: 'relative'
    }, arguments[1] || { });
    this.start(options);
  },
  setup: function() {
    this.element.makePositioned();
    this.originalLeft = parseFloat(this.element.getStyle('left') || '0');
    this.originalTop  = parseFloat(this.element.getStyle('top')  || '0');
    if (this.options.mode == 'absolute') {
      this.options.x = this.options.x - this.originalLeft;
      this.options.y = this.options.y - this.originalTop;
    }
  },
  update: function(position) {
    this.element.setStyle({
      left: (this.options.x  * position + this.originalLeft).round() + 'px',
      top:  (this.options.y  * position + this.originalTop).round()  + 'px'
    });
  }
});

// for backwards compatibility
Effect.MoveBy = function(element, toTop, toLeft) {
  return new Effect.Move(element, 
    Object.extend({ x: toLeft, y: toTop }, arguments[3] || { }));
};

Effect.Scale = Class.create(Effect.Base, {
  initialize: function(element, percent) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({
      scaleX: true,
      scaleY: true,
      scaleContent: true,
      scaleFromCenter: false,
      scaleMode: 'box',        // 'box' or 'contents' or { } with provided values
      scaleFrom: 100.0,
      scaleTo:   percent
    }, arguments[2] || { });
    this.start(options);
  },
  setup: function() {
    this.restoreAfterFinish = this.options.restoreAfterFinish || false;
    this.elementPositioning = this.element.getStyle('position');
    
    this.originalStyle = { };
    ['top','left','width','height','fontSize'].each( function(k) {
      this.originalStyle[k] = this.element.style[k];
    }.bind(this));
      
    this.originalTop  = this.element.offsetTop;
    this.originalLeft = this.element.offsetLeft;
    
    var fontSize = this.element.getStyle('font-size') || '100%';
    ['em','px','%','pt'].each( function(fontSizeType) {
      if (fontSize.indexOf(fontSizeType)>0) {
        this.fontSize     = parseFloat(fontSize);
        this.fontSizeType = fontSizeType;
      }
    }.bind(this));
    
    this.factor = (this.options.scaleTo - this.options.scaleFrom)/100;
    
    this.dims = null;
    if (this.options.scaleMode=='box')
      this.dims = [this.element.offsetHeight, this.element.offsetWidth];
    if (/^content/.test(this.options.scaleMode))
      this.dims = [this.element.scrollHeight, this.element.scrollWidth];
    if (!this.dims)
      this.dims = [this.options.scaleMode.originalHeight,
                   this.options.scaleMode.originalWidth];
  },
  update: function(position) {
    var currentScale = (this.options.scaleFrom/100.0) + (this.factor * position);
    if (this.options.scaleContent && this.fontSize)
      this.element.setStyle({fontSize: this.fontSize * currentScale + this.fontSizeType });
    this.setDimensions(this.dims[0] * currentScale, this.dims[1] * currentScale);
  },
  finish: function(position) {
    if (this.restoreAfterFinish) this.element.setStyle(this.originalStyle);
  },
  setDimensions: function(height, width) {
    var d = { };
    if (this.options.scaleX) d.width = width.round() + 'px';
    if (this.options.scaleY) d.height = height.round() + 'px';
    if (this.options.scaleFromCenter) {
      var topd  = (height - this.dims[0])/2;
      var leftd = (width  - this.dims[1])/2;
      if (this.elementPositioning == 'absolute') {
        if (this.options.scaleY) d.top = this.originalTop-topd + 'px';
        if (this.options.scaleX) d.left = this.originalLeft-leftd + 'px';
      } else {
        if (this.options.scaleY) d.top = -topd + 'px';
        if (this.options.scaleX) d.left = -leftd + 'px';
      }
    }
    this.element.setStyle(d);
  }
});

Effect.Highlight = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({ startcolor: '#ffff99' }, arguments[1] || { });
    this.start(options);
  },
  setup: function() {
    // Prevent executing on elements not in the layout flow
    if (this.element.getStyle('display')=='none') { this.cancel(); return; }
    // Disable background image during the effect
    this.oldStyle = { };
    if (!this.options.keepBackgroundImage) {
      this.oldStyle.backgroundImage = this.element.getStyle('background-image');
      this.element.setStyle({backgroundImage: 'none'});
    }
    if (!this.options.endcolor)
      this.options.endcolor = this.element.getStyle('background-color').parseColor('#ffffff');
    if (!this.options.restorecolor)
      this.options.restorecolor = this.element.getStyle('background-color');
    // init color calculations
    this._base  = $R(0,2).map(function(i){ return parseInt(this.options.startcolor.slice(i*2+1,i*2+3),16) }.bind(this));
    this._delta = $R(0,2).map(function(i){ return parseInt(this.options.endcolor.slice(i*2+1,i*2+3),16)-this._base[i] }.bind(this));
  },
  update: function(position) {
    this.element.setStyle({backgroundColor: $R(0,2).inject('#',function(m,v,i){
      return m+((this._base[i]+(this._delta[i]*position)).round().toColorPart()); }.bind(this)) });
  },
  finish: function() {
    this.element.setStyle(Object.extend(this.oldStyle, {
      backgroundColor: this.options.restorecolor
    }));
  }
});

Effect.ScrollTo = function(element) {
  var options = arguments[1] || { },
    scrollOffsets = document.viewport.getScrollOffsets(),
    elementOffsets = $(element).cumulativeOffset(),
    max = (window.height || document.body.scrollHeight) - document.viewport.getHeight();  

  if (options.offset) elementOffsets[1] += options.offset;

  return new Effect.Tween(null,
    scrollOffsets.top,
    elementOffsets[1] > max ? max : elementOffsets[1],
    options,
    function(p){ scrollTo(scrollOffsets.left, p.round()) }
  );
};

/* ------------- combination effects ------------- */

Effect.Fade = function(element) {
  element = $(element);
  var oldOpacity = element.getInlineOpacity();
  var options = Object.extend({
    from: element.getOpacity() || 1.0,
    to:   0.0,
    afterFinishInternal: function(effect) { 
      if (effect.options.to!=0) return;
      effect.element.hide().setStyle({opacity: oldOpacity}); 
    }
  }, arguments[1] || { });
  return new Effect.Opacity(element,options);
};

Effect.Appear = function(element) {
  element = $(element);
  var options = Object.extend({
  from: (element.getStyle('display') == 'none' ? 0.0 : element.getOpacity() || 0.0),
  to:   1.0,
  // force Safari to render floated elements properly
  afterFinishInternal: function(effect) {
    effect.element.forceRerendering();
  },
  beforeSetup: function(effect) {
    effect.element.setOpacity(effect.options.from).show(); 
  }}, arguments[1] || { });
  return new Effect.Opacity(element,options);
};

Effect.Puff = function(element) {
  element = $(element);
  var oldStyle = { 
    opacity: element.getInlineOpacity(), 
    position: element.getStyle('position'),
    top:  element.style.top,
    left: element.style.left,
    width: element.style.width,
    height: element.style.height
  };
  return new Effect.Parallel(
   [ new Effect.Scale(element, 200, 
      { sync: true, scaleFromCenter: true, scaleContent: true, restoreAfterFinish: true }), 
     new Effect.Opacity(element, { sync: true, to: 0.0 } ) ], 
     Object.extend({ duration: 1.0, 
      beforeSetupInternal: function(effect) {
        Position.absolutize(effect.effects[0].element)
      },
      afterFinishInternal: function(effect) {
         effect.effects[0].element.hide().setStyle(oldStyle); }
     }, arguments[1] || { })
   );
};

Effect.BlindUp = function(element) {
  element = $(element);
  element.makeClipping();
  return new Effect.Scale(element, 0,
    Object.extend({ scaleContent: false, 
      scaleX: false, 
      restoreAfterFinish: true,
      afterFinishInternal: function(effect) {
        effect.element.hide().undoClipping();
      } 
    }, arguments[1] || { })
  );
};

Effect.BlindDown = function(element) {
  element = $(element);
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, 100, Object.extend({ 
    scaleContent: false, 
    scaleX: false,
    scaleFrom: 0,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) {
      effect.element.makeClipping().setStyle({height: '0px'}).show(); 
    },  
    afterFinishInternal: function(effect) {
      effect.element.undoClipping();
    }
  }, arguments[1] || { }));
};

Effect.SwitchOff = function(element) {
  element = $(element);
  var oldOpacity = element.getInlineOpacity();
  return new Effect.Appear(element, Object.extend({
    duration: 0.4,
    from: 0,
    transition: Effect.Transitions.flicker,
    afterFinishInternal: function(effect) {
      new Effect.Scale(effect.element, 1, { 
        duration: 0.3, scaleFromCenter: true,
        scaleX: false, scaleContent: false, restoreAfterFinish: true,
        beforeSetup: function(effect) { 
          effect.element.makePositioned().makeClipping();
        },
        afterFinishInternal: function(effect) {
          effect.element.hide().undoClipping().undoPositioned().setStyle({opacity: oldOpacity});
        }
      })
    }
  }, arguments[1] || { }));
};

Effect.DropOut = function(element) {
  element = $(element);
  var oldStyle = {
    top: element.getStyle('top'),
    left: element.getStyle('left'),
    opacity: element.getInlineOpacity() };
  return new Effect.Parallel(
    [ new Effect.Move(element, {x: 0, y: 100, sync: true }), 
      new Effect.Opacity(element, { sync: true, to: 0.0 }) ],
    Object.extend(
      { duration: 0.5,
        beforeSetup: function(effect) {
          effect.effects[0].element.makePositioned(); 
        },
        afterFinishInternal: function(effect) {
          effect.effects[0].element.hide().undoPositioned().setStyle(oldStyle);
        } 
      }, arguments[1] || { }));
};

Effect.Shake = function(element) {
  element = $(element);
  var options = Object.extend({
    distance: 20,
    duration: 0.5
  }, arguments[1] || {});
  var distance = parseFloat(options.distance);
  var split = parseFloat(options.duration) / 10.0;
  var oldStyle = {
    top: element.getStyle('top'),
    left: element.getStyle('left') };
    return new Effect.Move(element,
      { x:  distance, y: 0, duration: split, afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x: -distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x:  distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x: -distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x:  distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x: -distance, y: 0, duration: split, afterFinishInternal: function(effect) {
        effect.element.undoPositioned().setStyle(oldStyle);
  }}) }}) }}) }}) }}) }});
};

Effect.SlideDown = function(element) {
  element = $(element).cleanWhitespace();
  // SlideDown need to have the content of the element wrapped in a container element with fixed height!
  var oldInnerBottom = element.down().getStyle('bottom');
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, 100, Object.extend({ 
    scaleContent: false, 
    scaleX: false, 
    scaleFrom: window.opera ? 0 : 1,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) {
      effect.element.makePositioned();
      effect.element.down().makePositioned();
      if (window.opera) effect.element.setStyle({top: ''});
      effect.element.makeClipping().setStyle({height: '0px'}).show(); 
    },
    afterUpdateInternal: function(effect) {
      effect.element.down().setStyle({bottom:
        (effect.dims[0] - effect.element.clientHeight) + 'px' }); 
    },
    afterFinishInternal: function(effect) {
      effect.element.undoClipping().undoPositioned();
      effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom}); }
    }, arguments[1] || { })
  );
};

Effect.SlideUp = function(element) {
  element = $(element).cleanWhitespace();
  var oldInnerBottom = element.down().getStyle('bottom');
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, window.opera ? 0 : 1,
   Object.extend({ scaleContent: false, 
    scaleX: false, 
    scaleMode: 'box',
    scaleFrom: 100,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) {
      effect.element.makePositioned();
      effect.element.down().makePositioned();
      if (window.opera) effect.element.setStyle({top: ''});
      effect.element.makeClipping().show();
    },  
    afterUpdateInternal: function(effect) {
      effect.element.down().setStyle({bottom:
        (effect.dims[0] - effect.element.clientHeight) + 'px' });
    },
    afterFinishInternal: function(effect) {
      effect.element.hide().undoClipping().undoPositioned();
      effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom});
    }
   }, arguments[1] || { })
  );
};

// Bug in opera makes the TD containing this element expand for a instance after finish 
Effect.Squish = function(element) {
  return new Effect.Scale(element, window.opera ? 1 : 0, { 
    restoreAfterFinish: true,
    beforeSetup: function(effect) {
      effect.element.makeClipping(); 
    },  
    afterFinishInternal: function(effect) {
      effect.element.hide().undoClipping(); 
    }
  });
};

Effect.Grow = function(element) {
  element = $(element);
  var options = Object.extend({
    direction: 'center',
    moveTransition: Effect.Transitions.sinoidal,
    scaleTransition: Effect.Transitions.sinoidal,
    opacityTransition: Effect.Transitions.full
  }, arguments[1] || { });
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    height: element.style.height,
    width: element.style.width,
    opacity: element.getInlineOpacity() };

  var dims = element.getDimensions();    
  var initialMoveX, initialMoveY;
  var moveX, moveY;
  
  switch (options.direction) {
    case 'top-left':
      initialMoveX = initialMoveY = moveX = moveY = 0; 
      break;
    case 'top-right':
      initialMoveX = dims.width;
      initialMoveY = moveY = 0;
      moveX = -dims.width;
      break;
    case 'bottom-left':
      initialMoveX = moveX = 0;
      initialMoveY = dims.height;
      moveY = -dims.height;
      break;
    case 'bottom-right':
      initialMoveX = dims.width;
      initialMoveY = dims.height;
      moveX = -dims.width;
      moveY = -dims.height;
      break;
    case 'center':
      initialMoveX = dims.width / 2;
      initialMoveY = dims.height / 2;
      moveX = -dims.width / 2;
      moveY = -dims.height / 2;
      break;
  }
  
  return new Effect.Move(element, {
    x: initialMoveX,
    y: initialMoveY,
    duration: 0.01, 
    beforeSetup: function(effect) {
      effect.element.hide().makeClipping().makePositioned();
    },
    afterFinishInternal: function(effect) {
      new Effect.Parallel(
        [ new Effect.Opacity(effect.element, { sync: true, to: 1.0, from: 0.0, transition: options.opacityTransition }),
          new Effect.Move(effect.element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition }),
          new Effect.Scale(effect.element, 100, {
            scaleMode: { originalHeight: dims.height, originalWidth: dims.width }, 
            sync: true, scaleFrom: window.opera ? 1 : 0, transition: options.scaleTransition, restoreAfterFinish: true})
        ], Object.extend({
             beforeSetup: function(effect) {
               effect.effects[0].element.setStyle({height: '0px'}).show(); 
             },
             afterFinishInternal: function(effect) {
               effect.effects[0].element.undoClipping().undoPositioned().setStyle(oldStyle); 
             }
           }, options)
      )
    }
  });
};

Effect.Shrink = function(element) {
  element = $(element);
  var options = Object.extend({
    direction: 'center',
    moveTransition: Effect.Transitions.sinoidal,
    scaleTransition: Effect.Transitions.sinoidal,
    opacityTransition: Effect.Transitions.none
  }, arguments[1] || { });
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    height: element.style.height,
    width: element.style.width,
    opacity: element.getInlineOpacity() };

  var dims = element.getDimensions();
  var moveX, moveY;
  
  switch (options.direction) {
    case 'top-left':
      moveX = moveY = 0;
      break;
    case 'top-right':
      moveX = dims.width;
      moveY = 0;
      break;
    case 'bottom-left':
      moveX = 0;
      moveY = dims.height;
      break;
    case 'bottom-right':
      moveX = dims.width;
      moveY = dims.height;
      break;
    case 'center':  
      moveX = dims.width / 2;
      moveY = dims.height / 2;
      break;
  }
  
  return new Effect.Parallel(
    [ new Effect.Opacity(element, { sync: true, to: 0.0, from: 1.0, transition: options.opacityTransition }),
      new Effect.Scale(element, window.opera ? 1 : 0, { sync: true, transition: options.scaleTransition, restoreAfterFinish: true}),
      new Effect.Move(element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition })
    ], Object.extend({            
         beforeStartInternal: function(effect) {
           effect.effects[0].element.makePositioned().makeClipping(); 
         },
         afterFinishInternal: function(effect) {
           effect.effects[0].element.hide().undoClipping().undoPositioned().setStyle(oldStyle); }
       }, options)
  );
};

Effect.Pulsate = function(element) {
  element = $(element);
  var options    = arguments[1] || { };
  var oldOpacity = element.getInlineOpacity();
  var transition = options.transition || Effect.Transitions.sinoidal;
  var reverser   = function(pos){ return transition(1-Effect.Transitions.pulse(pos, options.pulses)) };
  reverser.bind(transition);
  return new Effect.Opacity(element, 
    Object.extend(Object.extend({  duration: 2.0, from: 0,
      afterFinishInternal: function(effect) { effect.element.setStyle({opacity: oldOpacity}); }
    }, options), {transition: reverser}));
};

Effect.Fold = function(element) {
  element = $(element);
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    width: element.style.width,
    height: element.style.height };
  element.makeClipping();
  return new Effect.Scale(element, 5, Object.extend({   
    scaleContent: false,
    scaleX: false,
    afterFinishInternal: function(effect) {
    new Effect.Scale(element, 1, { 
      scaleContent: false, 
      scaleY: false,
      afterFinishInternal: function(effect) {
        effect.element.hide().undoClipping().setStyle(oldStyle);
      } });
  }}, arguments[1] || { }));
};

Effect.Morph = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({
      style: { }
    }, arguments[1] || { });
    
    if (!Object.isString(options.style)) this.style = $H(options.style);
    else {
      if (options.style.include(':'))
        this.style = options.style.parseStyle();
      else {
        this.element.addClassName(options.style);
        this.style = $H(this.element.getStyles());
        this.element.removeClassName(options.style);
        var css = this.element.getStyles();
        this.style = this.style.reject(function(style) {
          return style.value == css[style.key];
        });
        options.afterFinishInternal = function(effect) {
          effect.element.addClassName(effect.options.style);
          effect.transforms.each(function(transform) {
            effect.element.style[transform.style] = '';
          });
        }
      }
    }
    this.start(options);
  },
  
  setup: function(){
    function parseColor(color){
      if (!color || ['rgba(0, 0, 0, 0)','transparent'].include(color)) color = '#ffffff';
      color = color.parseColor();
      return $R(0,2).map(function(i){
        return parseInt( color.slice(i*2+1,i*2+3), 16 ) 
      });
    }
    this.transforms = this.style.map(function(pair){
      var property = pair[0], value = pair[1], unit = null;

      if (value.parseColor('#zzzzzz') != '#zzzzzz') {
        value = value.parseColor();
        unit  = 'color';
      } else if (property == 'opacity') {
        value = parseFloat(value);
        if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
          this.element.setStyle({zoom: 1});
      } else if (Element.CSS_LENGTH.test(value)) {
          var components = value.match(/^([\+\-]?[0-9\.]+)(.*)$/);
          value = parseFloat(components[1]);
          unit = (components.length == 3) ? components[2] : null;
      }

      var originalValue = this.element.getStyle(property);
      return { 
        style: property.camelize(), 
        originalValue: unit=='color' ? parseColor(originalValue) : parseFloat(originalValue || 0), 
        targetValue: unit=='color' ? parseColor(value) : value,
        unit: unit
      };
    }.bind(this)).reject(function(transform){
      return (
        (transform.originalValue == transform.targetValue) ||
        (
          transform.unit != 'color' &&
          (isNaN(transform.originalValue) || isNaN(transform.targetValue))
        )
      )
    });
  },
  update: function(position) {
    var style = { }, transform, i = this.transforms.length;
    while(i--)
      style[(transform = this.transforms[i]).style] = 
        transform.unit=='color' ? '#'+
          (Math.round(transform.originalValue[0]+
            (transform.targetValue[0]-transform.originalValue[0])*position)).toColorPart() +
          (Math.round(transform.originalValue[1]+
            (transform.targetValue[1]-transform.originalValue[1])*position)).toColorPart() +
          (Math.round(transform.originalValue[2]+
            (transform.targetValue[2]-transform.originalValue[2])*position)).toColorPart() :
        (transform.originalValue +
          (transform.targetValue - transform.originalValue) * position).toFixed(3) + 
            (transform.unit === null ? '' : transform.unit);
    this.element.setStyle(style, true);
  }
});

Effect.Transform = Class.create({
  initialize: function(tracks){
    this.tracks  = [];
    this.options = arguments[1] || { };
    this.addTracks(tracks);
  },
  addTracks: function(tracks){
    tracks.each(function(track){
      track = $H(track);
      var data = track.values().first();
      this.tracks.push($H({
        ids:     track.keys().first(),
        effect:  Effect.Morph,
        options: { style: data }
      }));
    }.bind(this));
    return this;
  },
  play: function(){
    return new Effect.Parallel(
      this.tracks.map(function(track){
        var ids = track.get('ids'), effect = track.get('effect'), options = track.get('options');
        var elements = [$(ids) || $$(ids)].flatten();
        return elements.map(function(e){ return new effect(e, Object.extend({ sync:true }, options)) });
      }).flatten(),
      this.options
    );
  }
});

Element.CSS_PROPERTIES = $w(
  'backgroundColor backgroundPosition borderBottomColor borderBottomStyle ' + 
  'borderBottomWidth borderLeftColor borderLeftStyle borderLeftWidth ' +
  'borderRightColor borderRightStyle borderRightWidth borderSpacing ' +
  'borderTopColor borderTopStyle borderTopWidth bottom clip color ' +
  'fontSize fontWeight height left letterSpacing lineHeight ' +
  'marginBottom marginLeft marginRight marginTop markerOffset maxHeight '+
  'maxWidth minHeight minWidth opacity outlineColor outlineOffset ' +
  'outlineWidth paddingBottom paddingLeft paddingRight paddingTop ' +
  'right textIndent top width wordSpacing zIndex');
  
Element.CSS_LENGTH = /^(([\+\-]?[0-9\.]+)(em|ex|px|in|cm|mm|pt|pc|\%))|0$/;

String.__parseStyleElement = document.createElement('div');
String.prototype.parseStyle = function(){
  var style, styleRules = $H();
  if (Prototype.Browser.WebKit)
    style = new Element('div',{style:this}).style;
  else {
    String.__parseStyleElement.innerHTML = '<div style="' + this + '"></div>';
    style = String.__parseStyleElement.childNodes[0].style;
  }
  
  Element.CSS_PROPERTIES.each(function(property){
    if (style[property]) styleRules.set(property, style[property]); 
  });
  
  if (Prototype.Browser.IE && this.include('opacity'))
    styleRules.set('opacity', this.match(/opacity:\s*((?:0|1)?(?:\.\d*)?)/)[1]);

  return styleRules;
};

if (document.defaultView && document.defaultView.getComputedStyle) {
  Element.getStyles = function(element) {
    var css = document.defaultView.getComputedStyle($(element), null);
    return Element.CSS_PROPERTIES.inject({ }, function(styles, property) {
      styles[property] = css[property];
      return styles;
    });
  };
} else {
  Element.getStyles = function(element) {
    element = $(element);
    var css = element.currentStyle, styles;
    styles = Element.CSS_PROPERTIES.inject({ }, function(results, property) {
      results[property] = css[property];
      return results;
    });
    if (!styles.opacity) styles.opacity = element.getOpacity();
    return styles;
  };
};

Effect.Methods = {
  morph: function(element, style) {
    element = $(element);
    new Effect.Morph(element, Object.extend({ style: style }, arguments[2] || { }));
    return element;
  },
  visualEffect: function(element, effect, options) {
    element = $(element)
    var s = effect.dasherize().camelize(), klass = s.charAt(0).toUpperCase() + s.substring(1);
    new Effect[klass](element, options);
    return element;
  },
  highlight: function(element, options) {
    element = $(element);
    new Effect.Highlight(element, options);
    return element;
  }
};

$w('fade appear grow shrink fold blindUp blindDown slideUp slideDown '+
  'pulsate shake puff squish switchOff dropOut').each(
  function(effect) { 
    Effect.Methods[effect] = function(element, options){
      element = $(element);
      Effect[effect.charAt(0).toUpperCase() + effect.substring(1)](element, options);
      return element;
    }
  }
);

$w('getInlineOpacity forceRerendering setContentZoom collectTextNodes collectTextNodesIgnoreClass getStyles').each( 
  function(f) { Effect.Methods[f] = Element[f]; }
);

Element.addMethods(Effect.Methods);
// script.aculo.us builder.js v1.8.1, Thu Jan 03 22:07:12 -0500 2008

// Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
//
// script.aculo.us is freely distributable under the terms of an MIT-style license.
// For details, see the script.aculo.us web site: http://script.aculo.us/

var Builder = {
  NODEMAP: {
    AREA: 'map',
    CAPTION: 'table',
    COL: 'table',
    COLGROUP: 'table',
    LEGEND: 'fieldset',
    OPTGROUP: 'select',
    OPTION: 'select',
    PARAM: 'object',
    TBODY: 'table',
    TD: 'table',
    TFOOT: 'table',
    TH: 'table',
    THEAD: 'table',
    TR: 'table'
  },
  // note: For Firefox < 1.5, OPTION and OPTGROUP tags are currently broken,
  //       due to a Firefox bug
  node: function(elementName) {
    elementName = elementName.toUpperCase();
    
    // try innerHTML approach
    var parentTag = this.NODEMAP[elementName] || 'div';
    var parentElement = document.createElement(parentTag);
    try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
      parentElement.innerHTML = "<" + elementName + "></" + elementName + ">";
    } catch(e) {}
    var element = parentElement.firstChild || null;
      
    // see if browser added wrapping tags
    if(element && (element.tagName.toUpperCase() != elementName))
      element = element.getElementsByTagName(elementName)[0];
    
    // fallback to createElement approach
    if(!element) element = document.createElement(elementName);
    
    // abort if nothing could be created
    if(!element) return;

    // attributes (or text)
    if(arguments[1])
      if(this._isStringOrNumber(arguments[1]) ||
        (arguments[1] instanceof Array) ||
        arguments[1].tagName) {
          this._children(element, arguments[1]);
        } else {
          var attrs = this._attributes(arguments[1]);
          if(attrs.length) {
            try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
              parentElement.innerHTML = "<" +elementName + " " +
                attrs + "></" + elementName + ">";
            } catch(e) {}
            element = parentElement.firstChild || null;
            // workaround firefox 1.0.X bug
            if(!element) {
              element = document.createElement(elementName);
              for(attr in arguments[1]) 
                element[attr == 'class' ? 'className' : attr] = arguments[1][attr];
            }
            if(element.tagName.toUpperCase() != elementName)
              element = parentElement.getElementsByTagName(elementName)[0];
          }
        } 

    // text, or array of children
    if(arguments[2])
      this._children(element, arguments[2]);

     return element;
  },
  _text: function(text) {
     return document.createTextNode(text);
  },

  ATTR_MAP: {
    'className': 'class',
    'htmlFor': 'for'
  },

  _attributes: function(attributes) {
    var attrs = [];
    for(attribute in attributes)
      attrs.push((attribute in this.ATTR_MAP ? this.ATTR_MAP[attribute] : attribute) +
          '="' + attributes[attribute].toString().escapeHTML().gsub(/"/,'&quot;') + '"');
    return attrs.join(" ");
  },
  _children: function(element, children) {
    if(children.tagName) {
      element.appendChild(children);
      return;
    }
    if(typeof children=='object') { // array can hold nodes and text
      children.flatten().each( function(e) {
        if(typeof e=='object')
          element.appendChild(e)
        else
          if(Builder._isStringOrNumber(e))
            element.appendChild(Builder._text(e));
      });
    } else
      if(Builder._isStringOrNumber(children))
        element.appendChild(Builder._text(children));
  },
  _isStringOrNumber: function(param) {
    return(typeof param=='string' || typeof param=='number');
  },
  build: function(html) {
    var element = this.node('div');
    $(element).update(html.strip());
    return element.down();
  },
  dump: function(scope) { 
    if(typeof scope != 'object' && typeof scope != 'function') scope = window; //global scope 
  
    var tags = ("A ABBR ACRONYM ADDRESS APPLET AREA B BASE BASEFONT BDO BIG BLOCKQUOTE BODY " +
      "BR BUTTON CAPTION CENTER CITE CODE COL COLGROUP DD DEL DFN DIR DIV DL DT EM FIELDSET " +
      "FONT FORM FRAME FRAMESET H1 H2 H3 H4 H5 H6 HEAD HR HTML I IFRAME IMG INPUT INS ISINDEX "+
      "KBD LABEL LEGEND LI LINK MAP MENU META NOFRAMES NOSCRIPT OBJECT OL OPTGROUP OPTION P "+
      "PARAM PRE Q S SAMP SCRIPT SELECT SMALL SPAN STRIKE STRONG STYLE SUB SUP TABLE TBODY TD "+
      "TEXTAREA TFOOT TH THEAD TITLE TR TT U UL VAR").split(/\s+/);
  
    tags.each( function(tag){ 
      scope[tag] = function() { 
        return Builder.node.apply(Builder, [tag].concat($A(arguments)));  
      } 
    });
  }
}
// -----------------------------------------------------------------------------------
//
//	Lightbox v2.04
//	by Lokesh Dhakar - http://www.lokeshdhakar.com
//	Last Modification: 2/9/08
//
//	For more information, visit:
//	http://lokeshdhakar.com/projects/lightbox2/
//
//	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//  	- Free for use in both personal and commercial projects
//		- Attribution requires leaving author name, author link, and the license info intact.
//	
//  Thanks: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.com), and Thomas Fuchs(mir.aculo.us) for ideas, libs, and snippets.
//  		Artemy Tregubenko (arty.name) for cleanup and help in updating to latest ver of proto-aculous.
//
// -----------------------------------------------------------------------------------
/*

    Table of Contents
    -----------------
    Configuration

    Lightbox Class Declaration
    - initialize()
    - updateImageList()
    - start()
    - changeImage()
    - resizeImageContainer()
    - showImage()
    - updateDetails()
    - updateNav()
    - enableKeyboardNav()
    - disableKeyboardNav()
    - keyboardAction()
    - preloadNeighborImages()
    - end()
    
    Function Calls
    - document.observe()
   
*/
// -----------------------------------------------------------------------------------

//
//  Configurationl
//
LightboxOptions = Object.extend({
    fileLoadingImage:        '/images/lightbox/loading.gif',
    fileBottomNavCloseImage: '/images/lightbox/closelabel.gif',

    overlayOpacity: 0.8,   // controls transparency of shadow overlay

    animate: true,         // toggles resizing animations
    resizeSpeed: 7,        // controls the speed of the image resizing animations (1=slowest and 10=fastest)

    borderSize: 10,         //if you adjust the padding in the CSS, you will need to update this variable

	// When grouping images this is used to write: Image # of #.
	// Change it for non-english localization
	labelImage: "Nuotrauka",
	labelOf: "iš"
}, window.LightboxOptions || {});

// -----------------------------------------------------------------------------------

var Lightbox = Class.create();

Lightbox.prototype = {
    imageArray: [],
    activeImage: undefined,
    
    // initialize()
    // Constructor runs on completion of the DOM loading. Calls updateImageList and then
    // the function inserts html at the bottom of the page which is used to display the shadow 
    // overlay and the image container.
    //
    initialize: function() {    
        
        this.updateImageList();
        
        this.keyboardAction = this.keyboardAction.bindAsEventListener(this);

        if (LightboxOptions.resizeSpeed > 10) LightboxOptions.resizeSpeed = 10;
        if (LightboxOptions.resizeSpeed < 1)  LightboxOptions.resizeSpeed = 1;

	    this.resizeDuration = LightboxOptions.animate ? ((11 - LightboxOptions.resizeSpeed) * 0.15) : 0;
	    this.overlayDuration = LightboxOptions.animate ? 0.2 : 0;  // shadow fade in/out duration

        // When Lightbox starts it will resize itself from 250 by 250 to the current image dimension.
        // If animations are turned off, it will be hidden as to prevent a flicker of a
        // white 250 by 250 box.
        var size = (LightboxOptions.animate ? 250 : 1) + 'px';
        

        // Code inserts html at the bottom of the page that looks similar to this:
        //
        //  <div id="overlay"></div>
        //  <div id="lightbox">
        //      <div id="outerImageContainer">
        //          <div id="imageContainer">
        //              <img id="lightboxImage">
        //              <div style="" id="hoverNav">
        //                  <a href="#" id="prevLink"></a>
        //                  <a href="#" id="nextLink"></a>
        //              </div>
        //              <div id="loading">
        //                  <a href="#" id="loadingLink">
        //                      <img src="images/loading.gif">
        //                  </a>
        //              </div>
        //          </div>
        //      </div>
        //      <div id="imageDataContainer">
        //          <div id="imageData">
        //              <div id="imageDetails">
        //                  <span id="caption"></span>
        //                  <span id="numberDisplay"></span>
        //              </div>
        //              <div id="bottomNav">
        //                  <a href="#" id="bottomNavClose">
        //                      <img src="images/close.gif">
        //                  </a>
        //              </div>
        //          </div>
        //      </div>
        //  </div>


        var objBody = $$('body')[0];

		objBody.appendChild(Builder.node('div',{id:'overlay'}));
	
        objBody.appendChild(Builder.node('div',{id:'lightbox'}, [
            Builder.node('div',{id:'outerImageContainer'}, 
                Builder.node('div',{id:'imageContainer'}, [
                    Builder.node('img',{id:'lightboxImage'}), 
                    Builder.node('div',{id:'hoverNav'}, [
                        Builder.node('a',{id:'prevLink', href: '#' }),
                        Builder.node('a',{id:'nextLink', href: '#' })
                    ]),
                    Builder.node('div',{id:'loading'}, 
                        Builder.node('a',{id:'loadingLink', href: '#' }, 
                            Builder.node('img', {src: LightboxOptions.fileLoadingImage})
                        )
                    )
                ])
            ),
            Builder.node('div', {id:'imageDataContainer'},
                Builder.node('div',{id:'imageData'}, [
                    Builder.node('div',{id:'imageDetails'}, [
                        Builder.node('span',{id:'caption'}),
                        Builder.node('span',{id:'numberDisplay'})
                    ]),
                    Builder.node('div',{id:'bottomNav'},
                        Builder.node('a',{id:'bottomNavClose', href: '#' },
                            Builder.node('img', { src: LightboxOptions.fileBottomNavCloseImage })
                        )
                    )
                ])
            )
        ]));


		$('overlay').hide().observe('click', (function() { this.end(); }).bind(this));
		$('lightbox').hide().observe('click', (function(event) { if (event.element().id == 'lightbox') this.end(); }).bind(this));
		$('outerImageContainer').setStyle({ width: size, height: size });
		$('prevLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activeImage - 1); }).bindAsEventListener(this));
		$('nextLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activeImage + 1); }).bindAsEventListener(this));
		$('loadingLink').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));
		$('bottomNavClose').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));

        var th = this;
        (function(){
            var ids = 
                'overlay lightbox outerImageContainer imageContainer lightboxImage hoverNav prevLink nextLink loading loadingLink ' + 
                'imageDataContainer imageData imageDetails caption numberDisplay bottomNav bottomNavClose';   
            $w(ids).each(function(id){ th[id] = $(id); });
        }).defer();
    },

    //
    // updateImageList()
    // Loops through anchor tags looking for 'lightbox' references and applies onclick
    // events to appropriate links. You can rerun after dynamically adding images w/ajax.
    //
    updateImageList: function() {   
        this.updateImageList = Prototype.emptyFunction;

        document.observe('click', (function(event){
            var target = event.findElement('a[rel^=lightbox]') || event.findElement('area[rel^=lightbox]');
            if (target) {
                event.stop();
                this.start(target);
            }
        }).bind(this));
    },
    
    //
    //  start()
    //  Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
    //
    start: function(imageLink) {    

        $$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'hidden' });

        // stretch overlay to fill page and fade in
        var arrayPageSize = this.getPageSize();
        $('overlay').setStyle({ width: arrayPageSize[0] + 'px', height: arrayPageSize[1] + 'px' });

        new Effect.Appear(this.overlay, { duration: this.overlayDuration, from: 0.0, to: LightboxOptions.overlayOpacity });

        this.imageArray = [];
        var imageNum = 0;       

        if ((imageLink.rel == 'lightbox')){
            // if image is NOT part of a set, add single image to imageArray
            this.imageArray.push([imageLink.href, imageLink.title]);         
        } else {
            // if image is part of a set..
            this.imageArray = 
                $$(imageLink.tagName + '[href][rel="' + imageLink.rel + '"]').
                collect(function(anchor){ return [anchor.href, anchor.title]; }).
                uniq();
            
            while (this.imageArray[imageNum][0] != imageLink.href) { imageNum++; }
        }

        // calculate top and left offset for the lightbox 
        var arrayPageScroll = document.viewport.getScrollOffsets();
        var lightboxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 10);
        var lightboxLeft = arrayPageScroll[0];
        this.lightbox.setStyle({ top: 3 + 'px', left: lightboxLeft + 'px' }).show();
        
        this.changeImage(imageNum);
    },

    //
    //  changeImage()
    //  Hide most elements and preload image in preparation for resizing image container.
    //
    changeImage: function(imageNum) {   
        
        this.activeImage = imageNum; // update global var

        // hide elements during transition
        if (LightboxOptions.animate) this.loading.show();
        this.lightboxImage.hide();
        this.hoverNav.hide();
        this.prevLink.hide();
        this.nextLink.hide();
		// HACK: Opera9 does not currently support scriptaculous opacity and appear fx
        this.imageDataContainer.setStyle({opacity: .0001});
        this.numberDisplay.hide();      
        
        var imgPreloader = new Image();
        
        // once image is preloaded, resize image container


        imgPreloader.onload = (function(){
            this.lightboxImage.src = this.imageArray[this.activeImage][0];
            this.resizeImageContainer(imgPreloader.width, imgPreloader.height);
        }).bind(this);
        imgPreloader.src = this.imageArray[this.activeImage][0];
    },

    //
    //  resizeImageContainer()
    //
    resizeImageContainer: function(imgWidth, imgHeight) {

        // get current width and height
        var widthCurrent  = this.outerImageContainer.getWidth();
        var heightCurrent = this.outerImageContainer.getHeight();

        // get new width and height
        var widthNew  = (imgWidth  + LightboxOptions.borderSize * 2);
        var heightNew = (imgHeight + LightboxOptions.borderSize * 2);

        // scalars based on change from old to new
        var xScale = (widthNew  / widthCurrent)  * 100;
        var yScale = (heightNew / heightCurrent) * 100;

        // calculate size difference between new and old image, and resize if necessary
        var wDiff = widthCurrent - widthNew;
        var hDiff = heightCurrent - heightNew;

        if (hDiff != 0) new Effect.Scale(this.outerImageContainer, yScale, {scaleX: false, duration: this.resizeDuration, queue: 'front'}); 
        if (wDiff != 0) new Effect.Scale(this.outerImageContainer, xScale, {scaleY: false, duration: this.resizeDuration, delay: this.resizeDuration}); 

        // if new and old image are same size and no scaling transition is necessary, 
        // do a quick pause to prevent image flicker.
        var timeout = 0;
        if ((hDiff == 0) && (wDiff == 0)){
            timeout = 100;
            if (Prototype.Browser.IE) timeout = 250;   
        }

        (function(){
            this.prevLink.setStyle({ height: imgHeight + 'px' });
            this.nextLink.setStyle({ height: imgHeight + 'px' });
            this.imageDataContainer.setStyle({ width: widthNew + 'px' });

            this.showImage();
        }).bind(this).delay(timeout / 1000);
    },
    
    //
    //  showImage()
    //  Display image and begin preloading neighbors.
    //
    showImage: function(){
        this.loading.hide();
        new Effect.Appear(this.lightboxImage, { 
            duration: this.resizeDuration, 
            queue: 'end', 
            afterFinish: (function(){ this.updateDetails(); }).bind(this) 
        });
        this.preloadNeighborImages();
    },

    //
    //  updateDetails()
    //  Display caption, image number, and bottom nav.
    //
    updateDetails: function() {
    
        // if caption is not null
        if (this.imageArray[this.activeImage][1] != ""){
            this.caption.update(this.imageArray[this.activeImage][1]).show();
        }
        
        // if image is part of set display 'Image x of x' 
        if (this.imageArray.length > 1){
            this.numberDisplay.update( LightboxOptions.labelImage + ' ' + (this.activeImage + 1) + ' ' + LightboxOptions.labelOf + '  ' + this.imageArray.length).show();
        }

        new Effect.Parallel(
            [ 
                new Effect.SlideDown(this.imageDataContainer, { sync: true, duration: this.resizeDuration, from: 0.0, to: 1.0 }), 
                new Effect.Appear(this.imageDataContainer, { sync: true, duration: this.resizeDuration }) 
            ], 
            { 
                duration: this.resizeDuration, 
                afterFinish: (function() {
	                // update overlay size and update nav
	                var arrayPageSize = this.getPageSize();
	                this.overlay.setStyle({ height: arrayPageSize[1] + 'px' });
	                this.updateNav();
                }).bind(this)
            } 
        );
    },

    //
    //  updateNav()
    //  Display appropriate previous and next hover navigation.
    //
    updateNav: function() {

        this.hoverNav.show();               

        // if not first image in set, display prev image button
        if (this.activeImage > 0) this.prevLink.show();

        // if not last image in set, display next image button
        if (this.activeImage < (this.imageArray.length - 1)) this.nextLink.show();
        
        this.enableKeyboardNav();
    },

    //
    //  enableKeyboardNav()
    //
    enableKeyboardNav: function() {
        document.observe('keydown', this.keyboardAction); 
    },

    //
    //  disableKeyboardNav()
    //
    disableKeyboardNav: function() {
        document.stopObserving('keydown', this.keyboardAction); 
    },

    //
    //  keyboardAction()
    //
    keyboardAction: function(event) {
        var keycode = event.keyCode;

        var escapeKey;
        if (event.DOM_VK_ESCAPE) {  // mozilla
            escapeKey = event.DOM_VK_ESCAPE;
        } else { // ie
            escapeKey = 27;
        }

        var key = String.fromCharCode(keycode).toLowerCase();
        
        if (key.match(/x|o|c/) || (keycode == escapeKey)){ // close lightbox
            this.end();
        } else if ((key == 'p') || (keycode == 37)){ // display previous image
            if (this.activeImage != 0){
                this.disableKeyboardNav();
                this.changeImage(this.activeImage - 1);
            }
        } else if ((key == 'n') || (keycode == 39)){ // display next image
            if (this.activeImage != (this.imageArray.length - 1)){
                this.disableKeyboardNav();
                this.changeImage(this.activeImage + 1);
            }
        }
    },

    //
    //  preloadNeighborImages()
    //  Preload previous and next images.
    //
    preloadNeighborImages: function(){
        var preloadNextImage, preloadPrevImage;
        if (this.imageArray.length > this.activeImage + 1){
            preloadNextImage = new Image();
            preloadNextImage.src = this.imageArray[this.activeImage + 1][0];
        }
        if (this.activeImage > 0){
            preloadPrevImage = new Image();
            preloadPrevImage.src = this.imageArray[this.activeImage - 1][0];
        }
    
    },

    //
    //  end()
    //
    end: function() {
        this.disableKeyboardNav();
        this.lightbox.hide();
        new Effect.Fade(this.overlay, { duration: this.overlayDuration });
        $$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'visible' });
    },

    //
    //  getPageSize()
    //
    getPageSize: function() {
	        
	     var xScroll, yScroll;
		
		if (window.innerHeight && window.scrollMaxY) {	
			xScroll = window.innerWidth + window.scrollMaxX;
			yScroll = window.innerHeight + window.scrollMaxY;
		} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
			xScroll = document.body.scrollWidth;
			yScroll = document.body.scrollHeight;
		} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
			xScroll = document.body.offsetWidth;
			yScroll = document.body.offsetHeight;
		}
		
		var windowWidth, windowHeight;
		
		if (self.innerHeight) {	// all except Explorer
			if(document.documentElement.clientWidth){
				windowWidth = document.documentElement.clientWidth; 
			} else {
				windowWidth = self.innerWidth;
			}
			windowHeight = self.innerHeight;
		} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
			windowWidth = document.documentElement.clientWidth;
			windowHeight = document.documentElement.clientHeight;
		} else if (document.body) { // other Explorers
			windowWidth = document.body.clientWidth;
			windowHeight = document.body.clientHeight;
		}	
		
		// for small pages with total height less then height of the viewport
		if(yScroll < windowHeight){
			pageHeight = windowHeight;
		} else { 
			pageHeight = yScroll;
		}
	
		// for small pages with total width less then width of the viewport
		if(xScroll < windowWidth){	
			pageWidth = xScroll;		
		} else {
			pageWidth = windowWidth;
		}

		return [pageWidth,pageHeight];
	}
}

document.observe('dom:loaded', function () { new Lightbox(); });YAHOO.namespace('europa');

YAHOO.europa.AjaxResponse = function() {
    return {
        isValid: function(response) {
            return response.status != 0 && response.status != -1;
        },

        isUnauthorized: function(response) {
            return response.status == 401;
        }
    };
}();YAHOO.namespace('europa');

(function(){
    var Dom = YAHOO.util.Dom;

    var DialogState = function(dialog) {
        this._dialog = dialog;
    };

    DialogState.prototype = {
        setProcessing: function(buttonIndex) {
            this._disableButton(buttonIndex);
            this._showProcessingIndicator();
        },

        setNormal: function(buttonIndex) {
            this._hideProcessingIndicator();
            this._enableButton(buttonIndex);
        },

        _enableButton: function(index) {
            this._setButtonDisabledStatus(index, false);
        },

        _disableButton: function(index) {
            this._setButtonDisabledStatus(index, true);
        },

        _setButtonDisabledStatus: function(index, status) {
            var button = this._getButton(index);
            if (button) {
                if (button.nodeName) {
                    button.disabled = status;
                } else {
                    button.set('disabled', status);
                }
            }
        },

        _getButton: function(index) {
            return this._dialog.getButtons()[index];
        },

        _showProcessingIndicator: function() {
            Dom.addClass(Dom.getFirstChild(this._dialog.footer), 'working');
        },

        _hideProcessingIndicator: function() {
            Dom.removeClass(Dom.getFirstChild(this._dialog.footer), 'working');
        }
    };

    YAHOO.europa.DialogState = DialogState;
})();YAHOO.namespace('europa');

YAHOO.europa.DialogFactory = function() {
    return {
        createDefaultDialog: function(element) {
            return new YAHOO.widget.Dialog(element, {
                visible:         false,
                monitorresize:   false,
                close:           false,
                fixedcenter:     true,
                modal:           true,
                hideaftersubmit: false,
                zIndex:          1000
            });
        },

        createDefaultMessageDialog: function(element) {
            var dialog = new YAHOO.widget.SimpleDialog(element, {
                width:           '300px',
                visible:         false,
                monitorresize:   false,
                close:           false,
                fixedcenter:     true,
                modal:           true,
                hideaftersubmit: false,
                zIndex:          1000
            });
            dialog.cfg.queueProperty('buttons', [
                { text: 'Gerai', handler: dialog.hide }
            ]);
            return dialog;
        }
    };
}();YAHOO.namespace('europa');

YAHOO.europa.PasswordResetDialogManager = function() {
    var DIALOG_ELEMENT_ID = 'password-reset-dialog';
    var DIALOG_ERROR_ELEMENT_ID = 'password-reset-dialog-errors';
    var OK_DIALOG_ELEMENT_ID = 'password-reset-ok-dialog';

    var Dom = YAHOO.util.Dom;
    var dialog = null;
    var dialogState = null;
    var okDialog = null;

    var initButtons = function() {
        dialog.cfg.queueProperty('buttons', [
            { text: 'Siųsti', handler: handleSubmit },
            { text: 'Atšaukti', handler: handleCancel }
        ]);
    };

    var initHandlers = function() {
        dialog.callback.success = handleSuccess;
        dialog.callback.failure = handleFailure;
    };

    var handleCancel = function() {
        dialog.cancel();
        Dom.setStyle(DIALOG_ERROR_ELEMENT_ID, 'display', 'none');
    };

    var handleSubmit = function() {
        dialogState.setProcessing(0);
        dialog.submit();
    };

    var handleSuccess = function() {
        if (okDialog === null) {
            okDialog = YAHOO.europa.DialogFactory.createDefaultMessageDialog(OK_DIALOG_ELEMENT_ID);
            okDialog.setHeader('Pamirštas slaptažodis');
            okDialog.setBody('Jūsų nurodytu el. pašto adresu nusiųstas laiškas su naujo slaptažodžio aktyvavimo instrukcijomis.');
            okDialog.render(document.body);
        }
        dialogState.setNormal(0);
        dialog.hide();
        Dom.setStyle(DIALOG_ERROR_ELEMENT_ID, 'display', 'none');
        okDialog.show();
    };

    var handleFailure = function(response) {
        var errorContainer = Dom.get(DIALOG_ERROR_ELEMENT_ID);
        errorContainer.innerHTML = response.responseText;
        Dom.setStyle(errorContainer, 'display', 'block');
        dialogState.setNormal(0);
        dialog.center();
    };

    return {
        openDialog: function() {
            if (dialog === null) {
                dialog = YAHOO.europa.DialogFactory.createDefaultDialog(DIALOG_ELEMENT_ID);
                initButtons();
                initHandlers();
                dialogState = new YAHOO.europa.DialogState(dialog);
                Dom.setStyle(DIALOG_ELEMENT_ID, 'display', 'block');
                dialog.render();
            }
            dialog.show();
        }
    };
}();YAHOO.namespace('europa');

YAHOO.europa.LoginDialogManager = function() {
    var DIALOG_ELEMENT_ID = 'login-dialog';
    var DIALOG_ERROR_ELEMENT_ID = 'login-dialog-errors';

    var Dom = YAHOO.util.Dom;
    var Event = YAHOO.util.Event;
    var dialog = null;
    var dialogState = null;

    var initButtons = function() {
        dialog.cfg.queueProperty('buttons', [
            { text: 'Prisijungti', handler: handleSubmit },
            { text: 'Atšaukti', handler: handleCancel }
        ]);
    };

    var initHandlers = function() {
        dialog.callback.success = handleSuccess;
        dialog.callback.failure = handleFailure;
    };

    var handleCancel = function() {
        dialog.cancel();
        Dom.setStyle(DIALOG_ERROR_ELEMENT_ID, 'display', 'none');
    };

    var handleSubmit = function() {
        dialogState.setProcessing(0);
        dialog.submit();
    };

    var handleSuccess = function(response) {
        dialogState.setNormal(0);
        dialog.hide();
        Dom.setStyle(DIALOG_ERROR_ELEMENT_ID, 'display', 'none');
        window.location = response.responseText;
    };

    var handleFailure = function(response) {
        var errorContainer = Dom.get(DIALOG_ERROR_ELEMENT_ID);
        errorContainer.innerHTML = response.responseText;
        Dom.setStyle(errorContainer, 'display', 'block');
        dialogState.setNormal(0);
        dialog.center();
    };

    var initPasswordResetButton = function() {
        Event.on('password-reset-button', 'click', function(e) {
            dialog.hide();
            YAHOO.europa.PasswordResetDialogManager.openDialog();
            Event.stopEvent(e);
        });
    };

    return {
        openDialog: function() {
            if (dialog === null) {
                dialog = YAHOO.europa.DialogFactory.createDefaultDialog(DIALOG_ELEMENT_ID);
                initButtons();
                initPasswordResetButton();
                initHandlers();
                dialogState = new YAHOO.europa.DialogState(dialog);
                Dom.setStyle(DIALOG_ELEMENT_ID, 'display', 'block');
                dialog.render();
            }
            dialog.show();
        }
    };
}();YAHOO.namespace('europa');

YAHOO.europa.Map = function() {
    var Dom = YAHOO.util.Dom;
    var DEFAULT_ZOOM = 7;

    return {
        createMap: function(element) {
            var map = new GMap2(Dom.get(element));
            map.setCenter(new GLatLng(55.1694, 23.8813), DEFAULT_ZOOM); // Lietuva
            map.addControl(new GSmallZoomControl());
            map.enableScrollWheelZoom();
            return map;
        },

        markUser: function(map, user, focus) {
            var point = new GLatLng(user.latitude, user.longitude);
            var marker = new GMarker(point);
            GEvent.addListener(marker, 'mouseover', function() {
                if (!map.getInfoWindow().getPoint().equals(this.getLatLng())) {
                    this.openInfoWindowHtml('<a href="' + user.url + '">' + user.name + '</a><br />' + user.media + '<br /><br />' + user.address);
                }
            });
            map.addOverlay(marker);
            if (focus) {
                map.setCenter(point, DEFAULT_ZOOM);
            }
        }
    };
}();(function() {
    var Dom = YAHOO.util.Dom;
    var Event = YAHOO.util.Event;
    var Connect = YAHOO.util.Connect;

    var initLoginButton = function() {
        Event.on('login-button', 'click', function(e) {
            YAHOO.europa.LoginDialogManager.openDialog();
            Event.stopEvent(e);
        });
    };

    var initNewsletterSubscriptionForm = function() {
        var fieldClicked = false;
        Event.on('newsletter-form', 'click', function(e) {
            var target = Event.getTarget(e);
            if (target.nodeName.toLowerCase() === 'input') {
                if (!fieldClicked) {
                    target.value = '';
                    fieldClicked = true;
                }
            } else if (target.nodeName.toLowerCase() === 'button') {
                var previousButtonText = target.innerHTML;
                target.disabled = true;
                target.innerHTML = 'Palaukite...';
                var form = Dom.get('newsletter-form');
                var responseContainer = Dom.get('newsletter-response');
                Connect.setForm(form);
                Connect.asyncRequest('POST', form.action, {
                    success: function(response) {
                        responseContainer.innerHTML = response.responseText;
                        Dom.setStyle(responseContainer, 'display', 'block');
                        target.innerHTML = previousButtonText;
                        target.disabled = false;
                    },
                    failure: function(response) {
                        responseContainer.innerHTML = response.responseText;
                        Dom.setStyle(responseContainer, 'display', 'block');
                        target.innerHTML = previousButtonText;
                        target.disabled = false;
                    }
                });
            }
            Event.stopEvent(e);
        });
    };


    Event.onDOMReady(function() {
        initLoginButton();
        initNewsletterSubscriptionForm();
    });
})();