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编辑当前文件:/home2/sdektunc/.trash/cepali/lib/yuilib/2in3/2.9.0/build/yui2-event/yui2-event-debug.js

YUI.add('yui2-event', function(Y) {
    var YAHOO    = Y.YUI2;
    /*
Copyright (c) 2011, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.com/yui/license.html
version: 2.9.0
*/

/**
 * 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}  context 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.
 * @param fireOnce {boolean} If configured to fire once, the custom event
 * will only notify subscribers a single time regardless of how many times
 * the event is fired.  In addition, new subscribers will be notified
 * immediately if the event has already been fired.
 * @namespace YAHOO.util
 * @class CustomEvent
 * @constructor
 */
YAHOO.util.CustomEvent = function(type, context, silent, signature, fireOnce) {

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

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

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

/**
     * If configured to fire once, the custom event will only notify subscribers
     * a single time regardless of how many times the event is fired.  In addition,
     * new subscribers will be notified immediately if the event has already been
     * fired.
     * @property fireOnce
     * @type boolean
     * @default false
     */
    this.fireOnce = fireOnce;

/**
     * Indicates whether or not this event has ever been fired.
     * @property fired
     * @type boolean
     * @default false
     */
    this.fired = false;

/**
     * For fireOnce events the arguments the event was fired with are stored
     * so that new subscribers get the proper payload.
     * @property firedWith
     * @type Array
     */
    this.firedWith = null;

/**
 * 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) {
        YAHOO.log( "Creating " + this, "info", "Event" );
    }

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 fn {Function} The function to execute
 * @param obj <Object> An object to be passed along when the event fires.
 * Defaults to the custom event.
 * @param override <boolean|Object> If true, the obj passed in becomes the
 * execution context of the listener. If an object, that object becomes
 * the execution context. Defaults to the custom event.
 */
 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} overrideContext If true, the obj passed in
     * becomes the execution.
     * context of the listener. If an object, that object becomes the execution
     * context.
     */
    subscribe: function(fn, obj, overrideContext) {

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

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

var s = new YAHOO.util.Subscriber(fn, obj, overrideContext);

if (this.fireOnce && this.fired) {
            this.notify(s, this.firedWith);
        } else {
            this.subscribers.push(s);
        }
    },

/**
     * 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 context 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;

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

if (this.fireOnce) {
            if (this.fired) {
                YAHOO.log('fireOnce event has already fired: ' + this.type);
                return true;
            } else {
                this.firedWith = args;
            }
        }

this.fired = true;

if (!len && this.silent) {
            //YAHOO.log('DEBUG no subscribers');
            return true;
        }

if (!this.silent) {
            YAHOO.log( "Firing "       + this  + ", " +
                       "args: "        + args  + ", " +
                       "subscribers: " + len,
                       "info", "Event"                  );
        }

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

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

ret = this.notify(s, args);

if (false === ret) {
                    if (!this.silent) {
                        YAHOO.log("Event stopped, sub " + i + " of " + len, "info", "Event");
                    }

break;
                }
            }
        }

return (ret !== false);
    },

notify: function(s, args) {

var ret, param=null, scope = s.getScope(this.scope),
                 throwErrors = YAHOO.util.Event.throwErrors;

if (!this.silent) {
            YAHOO.log( this.type + "-> " + s, "info", "Event" );
        }

if (this.signature == YAHOO.util.CustomEvent.FLAT) {

if (args.length > 0) {
                param = args[0];
            }

try {
                ret = s.fn.call(scope, param, s.obj);
            } catch(e) {
                this.lastError = e;
                // errors.push(e);
                YAHOO.log(this + " subscriber exception: " + e, "error", "Event");
                if (throwErrors) {
                    throw e;
                }
            }
        } else {
            try {
                ret = s.fn.call(scope, this.type, args, s.obj);
            } catch(ex) {
                this.lastError = ex;
                YAHOO.log(this + " subscriber exception: " + ex, "error", "Event");
                if (throwErrors) {
                    throw ex;
                }
            }
        }

return ret;
    },

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

this.subscribers=[];

return l;
    },

/**
     * @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  + "', " +
             "context: " + 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}  overrideContext If true, the obj passed in becomes the execution
 *                            context of the listener
 * @class Subscriber
 * @constructor
 */
YAHOO.util.Subscriber = function(fn, obj, overrideContext) {

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

};

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

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

/**
         * 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
         */
        retryCount = 0,

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

/**
         * Counter for auto id generation
         * @property counter
         * @static
         * @private
         */
        counter = 0,

/**
         * Normalized keycodes for webkit/safari
         * @property webkitKeymap
         * @type {int: int}
         * @private
         * @static
         * @final
         */
         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)
        },

isIE = YAHOO.env.ua.ie,

// String constants used by the addFocusListener and removeFocusListener methods

FOCUSIN = "focusin",
        FOCUSOUT = "focusout";

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 500@amp;40 ms, so it will poll
             * for 20 seconds or until all outstanding handlers are bound
             * (whichever comes first).
             * @property POLL_RETRYS
             * @type int
             * @static
             * @final
             */
            POLL_RETRYS: 500,

/**
             * The poll interval in milliseconds
             * @property POLL_INTERVAL
             * @type int
             * @static
             * @final
             */
            POLL_INTERVAL: 40,

/**
             * 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 context 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 context, 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 context 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: isIE,

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

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

/**
             * Map of special event types
             * @property _specialTypes
             * @static
             * @private
             */
            _specialTypes: {
                focusin: (isIE ? "focusin" : "focus"),
                focusout: (isIE ? "focusout" : "blur")
            },

/**
             * 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);
                    this._interval = YAHOO.lang.later(this.POLL_INTERVAL, this, this._tryPreloadAttach, null, true);
                }
            },

/**
 * 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.
 *
 * The callback is executed with a single parameter:
 * the custom object parameter, if provided.
 *
 * @method onAvailable
 *
 * @param {string||string[]} id the id of the element, or an array
 * of ids to look for.
 * @param {function} fn what to execute when the element is found.
 * @param {object} obj an optional object to be passed back as
 * a parameter to fn.
 * @param {boolean|object} overrideContext If set to true, fn will execute
 * in the context of obj, if set to an object it
 * will execute in the context of that object
 * @param checkContent {boolean} check child node readiness (onContentReady)
 * @static
 */
 onAvailable: function(id, fn, obj, overrideContext, checkContent) {

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

for (var i=0; i<a.length; i=i+1) {
 onAvailStack.push({id: a[i],
 fn: fn,
 obj: obj,
 overrideContext: overrideContext,
 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.
 *
 * The callback is executed with a single parameter:
 * the custom object parameter, if provided.
 *
 * @method onContentReady
 *
 * @param {string} id the id of the element to look for.
 * @param {function} fn what to execute when the element is ready.
 * @param {object} obj an optional object to be passed back as
 * a parameter to fn.
 * @param {boolean|object} overrideContext If set to true, fn will execute
 * in the context of obj. If an object, fn will
 * exectute in the context of that object
 *
 * @static
 */
 onContentReady: function(id, fn, obj, overrideContext) {
 this.onAvailable(id, fn, obj, overrideContext, 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?
 *
 * The callback is a CustomEvent, so the signature is:
 * type <string>, args <array>, customobject <object>
 * For DOMReady events, there are no fire argments, so the
 * signature is:
 * "DOMReady", [], obj
 *
 *
 * @method onDOMReady
 *
 * @param {function} fn what to execute when the element is found.
 * @param {object} obj an optional object to be passed back as
 * a parameter to fn.
 * @param {boolean|object} overrideContext If set to true, fn will execute
 * in the context of obj, if set to an object it
 * will execute in the context of that object
 *
 * @static
 */
 // onDOMReady: function(fn, obj, overrideContext) {
 onDOMReady: function() {
 this.DOMReadyEvent.subscribe.apply(this.DOMReadyEvent, arguments);
 },

/**
             * 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}  overrideContext  If true, the obj passed in becomes
             *                             the execution context of the listener. If an
             *                             object, this object becomes the execution
             *                             context.
             * @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, overrideContext, bCapture) {

if (!fn || !fn.call) {
                    YAHOO.log(sType + " addListener failed, invalid callback", "error", "Event");
                    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.on(el[i],
 sType,
 fn,
 obj,
 overrideContext) && 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, overrideContext, bCapture);
                        });

return true;
                    }
                }

// Element should be an html element or an array if we get
                // here.
                if (!el) {
                    // this.logger.debug("unable to attach event " + sType);
                    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, overrideContext];
                    return true;
                }

// this.logger.debug("Adding handler: " + el + ", " + sType);

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

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

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

try {
                    this._simpleAdd(el, sType, wrappedFn, bCapture);
                } 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);
                    return false;
                }

return true;

/**
             * Checks to see if the type requested is a special type
             * (as defined by the _specialTypes hash), and (if so) returns
             * the special type name.
             *
             * @method _getType
             *
             * @param {String}   sType     The type to look up
             * @private
             */
            _getType: function (type) {

return this._specialTypes[type] || type;

/**
             * 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}  overrideContext  If true, the obj passed in becomes
             *                             the execution context of the listener. If an
             *                             object, this object becomes the execution
             *                             context.
             * @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, overrideContext) {

var capture = ((sType == FOCUSIN || sType == FOCUSOUT) && !YAHOO.env.ua.ie) ? true : false;

return this._addListener(el, this._getType(sType), fn, obj, overrideContext, capture);

/**
             * Attaches a focusin event listener to the specified element for
             * the purpose of listening for the focus event on the element's
             * descendants.
             * @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}  overrideContext  If true, the obj passed in becomes
             *                             the execution context of the listener. If an
             *                             object, this object becomes the execution
             *                             context.
             * @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
            * @deprecated use YAHOO.util.Event.on and specify "focusin" as the event type.
             */
            addFocusListener: function (el, fn, obj, overrideContext) {
                return this.on(el, FOCUSIN, fn, obj, overrideContext);
            },

/**
             * Removes a focusin event listener to the specified element for
             * the purpose of listening for the focus event on the element's
             * descendants.
             *
             * @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
             * @deprecated use YAHOO.util.Event.removeListener and specify "focusin" as the event type.
             */
            removeFocusListener: function (el, fn) {
                return this.removeListener(el, FOCUSIN, fn);
            },

/**
             * Attaches a focusout event listener to the specified element for
             * the purpose of listening for the blur event on the element's
             * descendants.
             *
             * @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}  overrideContext  If true, the obj passed in becomes
             *                             the execution context of the listener. If an
             *                             object, this object becomes the execution
             *                             context.
             * @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
             * @deprecated use YAHOO.util.Event.on and specify "focusout" as the event type.
             */
            addBlurListener: function (el, fn, obj, overrideContext) {
                return this.on(el, FOCUSOUT, fn, obj, overrideContext);
            },

/**
             * Removes a focusout event listener to the specified element for
             * the purpose of listening for the blur event on the element's
             * descendants.
             *
             * @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
             * @deprecated use YAHOO.util.Event.removeListener and specify "focusout" as the event type.
             */
            removeBlurListener: function (el, fn) {
                return this.removeListener(el, FOCUSOUT, fn);
            },

/**
             * 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) {
                var i, len, li;

sType = this._getType(sType);

// 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) && ok );
                    }
                    return ok;
                }

if (!fn || !fn.call) {
                    // this.logger.debug("Error, function is not valid " + fn);
                    //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[3];

if ("undefined" === typeof index) {
                    index = this._getCacheIndex(listeners, el, sType, fn);
                }

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

if (!el || !cacheItem) {
                    // this.logger.debug("cached listener not found");
                    return false;
                }

// this.logger.debug("Removing handler: " + el + ", " + sType);

var bCapture = cacheItem[this.CAPTURE] === true ? true : false;

try {
                    this._simpleRemove(el, sType, cacheItem[this.WFN], bCapture);
                } 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;

/**
             * 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.
             *
             * If accessing a property of the node throws an error, this is
             * probably the anonymous div wrapper Gecko adds inside text
             * nodes.  This likely will only occur when attempting to access
             * the relatedTarget.  In this case, we now return null because
             * the anonymous div is completely useless and we do not know
             * what the related target was because we can't even get to
             * the element's parent node.
             *
             * @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 null;
                }

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(a, el, sType, fn) {
 for (var i=0, l=a.length; i<l; i=i+1) {
 var li = a[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) {
                    YAHOO.log("node access error (xframe?)", "warn");
                    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", YAHOO, 0, 0, 1),

/**
             * 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;
                    if (this._interval) {
                        // clearInterval(this._interval);
                        this._interval.cancel();
                        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;

// this.logger.debug("tryPreloadAttach");

// 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 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 {
                    if (this._interval) {
                        // clearInterval(this._interval);
                        this._interval.cancel();
                        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);
                    }
                }

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:
             *   type:   (string)   the type of event
             *   fn:     (function) the callback supplied to addListener
             *   obj:    (object)   the custom object supplied to addListener
             *   adjust: (boolean|object)  whether or not to adjust the default context
             *   scope: (boolean)  the derived context based on the adjust parameter
             *   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 {
                    sType = this._getType(sType);
                    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],
 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(), context;

// execute and clear stored unload listeners
 for (i=0, len=unloadListeners.length; i<len; ++i) {
 l = ul[i];
 if (l) {
 try {
 context = window;
 if (l[EU.ADJ_SCOPE]) {
 if (l[EU.ADJ_SCOPE] === true) {
 context = l[EU.UNLOAD_OBJ];
 } else {
 context = l[EU.ADJ_SCOPE];
 }
 }
 l[EU.FN].call(context, EU.getEvent(e, l[EU.EL]), l[EU.UNLOAD_OBJ] );
 } catch(e1) {}
 ul[i] = null;
 }
 }

l = null;
                context = null;
                unloadListeners = null;

// Remove listeners to handle IE memory leaks
                // 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) {
                            try {
                                EU.removeListener(l[EU.EL], l[EU.TYPE], l[EU.FN], j);
                            } catch(e2) {}
                        }
                    }
                    l=null;
                }

try {
                    EU._simpleRemove(window, "unload", EU._unload);
                    EU._simpleRemove(window, "load", EU._load);
                } catch(e3) {}

/**
             * 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() {},

/**
             * Adds a DOM event directly without the caching, cleanup, context 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;

/**
 * Appends an event handler. This is an alias for <code>addListener</code>
 *
 * @method on
 *
 * @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} overrideContext If true, the obj passed in becomes
 * the execution context of the listener. If an
 * object, this object becomes the execution
 * context.
 * @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
 */
 EU.on = EU.addListener;

/**
         * YAHOO.util.Event.onFocus is an alias for addFocusListener
         * @method onFocus
         * @see addFocusListener
         * @static
         * @deprecated use YAHOO.util.Event.on and specify "focusin" as the event type.
         */
        EU.onFocus = EU.addFocusListener;

/**
         * YAHOO.util.Event.onBlur is an alias for addBlurListener
         * @method onBlur
         * @see addBlurListener
         * @static
         * @deprecated use YAHOO.util.Event.on and specify "focusout" as the event type.
         */
        EU.onBlur = EU.addBlurListener;

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

// 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) {
            if (self !== self.top) {
                document.onreadystatechange = function() {
                    if (document.readyState == 'complete') {
                        document.onreadystatechange = null;
                        EU._ready();
                    }
                };
            } else {

// 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 overrideContext {boolean}  If true, the obj passed in becomes the
     *                              execution scope of the listener
     */
    subscribe: function(p_type, p_fn, p_obj, overrideContext) {

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

if (ce) {
            ce.subscribe(p_fn, p_obj, overrideContext);
        } 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, overrideContext: overrideContext } );
        }
    },

/**
     * 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>
 * fireOnce: if true, the custom event will only notify subscribers
 * once regardless of the number of times the event is fired. In
 * addition, new subscribers will be executed immediately if the
 * event has already fired.
 * 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 || {},
            events = this.__yui_events, ce;

if (events[p_type]) {
YAHOO.log("EventProvider createEvent skipped: '"+p_type+"' already exists");
        } else {

ce = new YAHOO.util.CustomEvent(p_type, opts.scope || this, opts.silent,
                         YAHOO.util.CustomEvent.FLAT, opts.fireOnce);

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].overrideContext);
 }
 }
 }

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) {

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

if (!ce) {
YAHOO.log(p_type + "event fired before it was created.");
            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;
    }

};

(function() {

var Event = YAHOO.util.Event, Lang = YAHOO.lang;

/**
* 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) {
        YAHOO.log("No attachTo element specified", "error");
    } else if (!keyData) {
        YAHOO.log("No keyData specified", "error");
    } else if (!handler) {
        YAHOO.log("No handler specified", "error");
    }

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 (Lang.isString(attachTo)) {
        attachTo = document.getElementById(attachTo); // No Dom util
    }

if (Lang.isFunction(handler)) {
        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, keys = keyData.keys, key;

if (YAHOO.lang.isArray(keys)) {
 for (var i=0;i<keys.length;i++) {
 dataItem = keys[i];
 key = Event.getCharCode(e);

if (dataItem == key) {
                        keyEvent.fire(key, e);
                        break;
                    }
                }
            } else {
                key = Event.getCharCode(e);
                if (keys == key ) {
                    keyEvent.fire(key, e);
                }
            }
        }
    }

/**
    * Enables the KeyListener by attaching the DOM event listeners to the
    * target DOM element
    * @method enable
    */
    this.enable = function() {
        if (! this.enabled) {
            Event.on(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) {
            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 + "]" : "");
    };

};

var KeyListener = YAHOO.util.KeyListener;

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

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

/**
 * keycode constants for a subset of the special keys
 * @property KEY
 * @static
 * @final
 */
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: "2.9.0", build: "2800"});

YAHOO.util.Event.generateId = function(el) {
        if (!el.id) {
            el.id = Y.guid();
        }
        return el.id;
    };
    YAHOO.util.Event._load();
}, '2.9.0' ,{"requires": ["yui2-yahoo"]});