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YUI.add('yui2-tabview', 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

*/

(function() {

    /**

     * The tabview module provides a widget for managing content bound to tabs.

     * @module tabview

     * @requires yahoo, dom, event, element

     *

     */

    var Y = YAHOO.util,

        Dom = Y.Dom,

        Event = Y.Event,

        document = window.document,

        // STRING CONSTANTS

        ACTIVE = 'active',

        ACTIVE_INDEX = 'activeIndex',

        ACTIVE_TAB = 'activeTab',

        DISABLED = 'disabled',

        CONTENT_EL = 'contentEl',

        ELEMENT = 'element',

    /**

     * A widget to control tabbed views.

     * @namespace YAHOO.widget

     * @class TabView

     * @extends YAHOO.util.Element

     * @constructor

     * @param {HTMLElement | String | Object} el(optional) The html

     * element that represents the TabView, or the attribute object to use.

     * An element will be created if none provided.

     * @param {Object} attr (optional) A key map of the tabView's

     * initial attributes.  Ignored if first arg is attributes object.

     */

    TabView = function(el, attr) {

        attr = attr || {};

        if (arguments.length == 1 && !YAHOO.lang.isString(el) && !el.nodeName) {

            attr = el; // treat first arg as attr object

            el = attr.element || null;

        }

        if (!el && !attr.element) { // create if we dont have one

            el = this._createTabViewElement(attr);

        }

        TabView.superclass.constructor.call(this, el, attr);

    };

    YAHOO.extend(TabView, Y.Element, {

        /**

         * The className to add when building from scratch.

         * @property CLASSNAME

         * @default "navset"

         */

        CLASSNAME: 'yui-navset',

        /**

         * The className of the HTMLElement containing the TabView's tab elements

         * to look for when building from existing markup, or to add when building

         * from scratch.

         * All childNodes of the tab container are treated as Tabs when building

         * from existing markup.

         * @property TAB_PARENT_CLASSNAME

         * @default "nav"

         */

        TAB_PARENT_CLASSNAME: 'yui-nav',

        /**

         * The className of the HTMLElement containing the TabView's label elements

         * to look for when building from existing markup, or to add when building

         * from scratch.

         * All childNodes of the content container are treated as content elements when

         * building from existing markup.

         * @property CONTENT_PARENT_CLASSNAME

         * @default "nav-content"

         */

        CONTENT_PARENT_CLASSNAME: 'yui-content',

        _tabParent: null,

        _contentParent: null,

        /**

         * Adds a Tab to the TabView instance.

         * If no index is specified, the tab is added to the end of the tab list.

         * @method addTab

         * @param {YAHOO.widget.Tab} tab A Tab instance to add.

         * @param {Integer} index The position to add the tab.

         * @return void

         */

        addTab: function(tab, index) {

            var tabs = this.get('tabs'),

                tabParent = this._tabParent,

                contentParent = this._contentParent,

                tabElement = tab.get(ELEMENT),

                contentEl = tab.get(CONTENT_EL),

                activeIndex = this.get(ACTIVE_INDEX),

                before;

            if (!tabs) { // not ready yet

                this._queue[this._queue.length] = ['addTab', arguments];

                return false;

            }

            before = this.getTab(index);

            index = (index === undefined) ? tabs.length : index;

            tabs.splice(index, 0, tab);

            if (before) {

                tabParent.insertBefore(tabElement, before.get(ELEMENT));

                if (contentEl) {

                    contentParent.appendChild(contentEl);

                }

            } else {

                tabParent.appendChild(tabElement);

                if (contentEl) {

                    contentParent.appendChild(contentEl);

                }

            }

            if ( !tab.get(ACTIVE) ) {

                tab.set('contentVisible', false, true); /* hide if not active */

                if (index <= activeIndex) {

                    this.set(ACTIVE_INDEX, activeIndex + 1, true);

                }

            } else {

                this.set(ACTIVE_TAB, tab, true);

                this.set('activeIndex', index, true);

            }

            this._initTabEvents(tab);

        },

        _initTabEvents: function(tab) {

            tab.addListener( tab.get('activationEvent'), tab._onActivate, this, tab);

            tab.addListener('activationEventChange', tab._onActivationEventChange, this, tab);

        },

        _removeTabEvents: function(tab) {

            tab.removeListener(tab.get('activationEvent'), tab._onActivate, this, tab);

            tab.removeListener('activationEventChange', tab._onActivationEventChange, this, tab);

        },

        /**

         * Routes childNode events.

         * @method DOMEventHandler

         * @param {event} e The Dom event that is being handled.

         * @return void

         */

        DOMEventHandler: function(e) {

            var target = Event.getTarget(e),

                tabParent = this._tabParent,

                tabs = this.get('tabs'),

                tab,

                tabEl,

                contentEl;

            if (Dom.isAncestor(tabParent, target) ) {

                for (var i = 0, len = tabs.length; i < len; i++) {

                    tabEl = tabs[i].get(ELEMENT);

                    contentEl = tabs[i].get(CONTENT_EL);

                    if ( target == tabEl || Dom.isAncestor(tabEl, target) ) {

                        tab = tabs[i];

                        break; // note break

                    }

                }

                if (tab) {

                    tab.fireEvent(e.type, e);

                }

            }

        },

        /**

         * Returns the Tab instance at the specified index.

         * @method getTab

         * @param {Integer} index The position of the Tab.

         * @return YAHOO.widget.Tab

         */

        getTab: function(index) {

            return this.get('tabs')[index];

        },

        /**

         * Returns the index of given tab.

         * @method getTabIndex

         * @param {YAHOO.widget.Tab} tab The tab whose index will be returned.

         * @return int

         */

        getTabIndex: function(tab) {

            var index = null,

                tabs = this.get('tabs');

            for (var i = 0, len = tabs.length; i < len; ++i) {

                if (tab == tabs[i]) {

                    index = i;

                    break;

                }

            }

            return index;

        },

        /**

         * Removes the specified Tab from the TabView.

         * @method removeTab

         * @param {YAHOO.widget.Tab} item The Tab instance to be removed.

         * @return void

         */

        removeTab: function(tab) {

            var tabCount = this.get('tabs').length,

                activeIndex = this.get(ACTIVE_INDEX),

                index = this.getTabIndex(tab);

            if ( tab === this.get(ACTIVE_TAB) ) {

                if (tabCount > 1) { // select another tab

                    if (index + 1 === tabCount) { // if last, activate previous

                        this.set(ACTIVE_INDEX, index - 1);

                    } else { // activate next tab

                        this.set(ACTIVE_INDEX, index + 1);

                    }

                } else { // no more tabs

                    this.set(ACTIVE_TAB, null);

                }

            } else if (index < activeIndex) {

                this.set(ACTIVE_INDEX, activeIndex - 1, true);

            }

            this._removeTabEvents(tab);

            this._tabParent.removeChild( tab.get(ELEMENT) );

            this._contentParent.removeChild( tab.get(CONTENT_EL) );

            this._configs.tabs.value.splice(index, 1);

            tab.fireEvent('remove', { type: 'remove', tabview: this });

        },

        /**

         * Provides a readable name for the TabView instance.

         * @method toString

         * @return String

         */

        toString: function() {

            var name = this.get('id') || this.get('tagName');

            return "TabView " + name;

        },

        /**

         * The transiton to use when switching between tabs.

         * @method contentTransition

         */

        contentTransition: function(newTab, oldTab) {

            if (newTab) {

                newTab.set('contentVisible', true);

            }

            if (oldTab) {

                oldTab.set('contentVisible', false);

            }

        },

        /**

         * setAttributeConfigs TabView specific properties.

         * @method initAttributes

         * @param {Object} attr Hash of initial attributes

         */

        initAttributes: function(attr) {

            TabView.superclass.initAttributes.call(this, attr);

            if (!attr.orientation) {

                attr.orientation = 'top';

            }

            var el = this.get(ELEMENT);

            if (!this.hasClass(this.CLASSNAME)) {

                this.addClass(this.CLASSNAME);

            }

            /**

             * The Tabs belonging to the TabView instance.

             * @attribute tabs

             * @type Array

             */

            this.setAttributeConfig('tabs', {

                value: [],

                readOnly: true

            });

            /**

             * The container of the tabView's label elements.

             * @property _tabParent

             * @private

             * @type HTMLElement

             */

            this._tabParent =

                    this.getElementsByClassName(this.TAB_PARENT_CLASSNAME,

                            'ul' )[0] || this._createTabParent();

            /**

             * The container of the tabView's content elements.

             * @property _contentParent

             * @type HTMLElement

             * @private

             */

            this._contentParent =

                    this.getElementsByClassName(this.CONTENT_PARENT_CLASSNAME,

                            'div')[0] ||  this._createContentParent();

            /**

             * How the Tabs should be oriented relative to the TabView.

             * Valid orientations are "top", "left", "bottom", and "right"

             * @attribute orientation

             * @type String

             * @default "top"

             */

            this.setAttributeConfig('orientation', {

                value: attr.orientation,

                method: function(value) {

                    var current = this.get('orientation');

                    this.addClass('yui-navset-' + value);

                    if (current != value) {

                        this.removeClass('yui-navset-' + current);

                    }

                    if (value === 'bottom') {

                        this.appendChild(this._tabParent);

                    }

                }

            });

            /**

             * The index of the tab currently active.

             * @attribute activeIndex

             * @type Int

             */

            this.setAttributeConfig(ACTIVE_INDEX, {

                value: attr.activeIndex,

                validator: function(value) {

                    var ret = true,

                        tab;

                    if (value) { // cannot activate if disabled

                        tab = this.getTab(value);

                        if (tab && tab.get(DISABLED)) {

                            ret = false;

                        }

                    }

                    return ret;

                }

            });

            /**

             * The tab currently active.

             * @attribute activeTab

             * @type YAHOO.widget.Tab

             */

            this.setAttributeConfig(ACTIVE_TAB, {

                value: attr[ACTIVE_TAB],

                method: function(tab) {

                    var activeTab = this.get(ACTIVE_TAB);

                    if (tab) {

                        tab.set(ACTIVE, true);

                    }

                    if (activeTab && activeTab !== tab) {

                        activeTab.set(ACTIVE, false);

                    }

                    if (activeTab && tab !== activeTab) { // no transition if only 1

                        this.contentTransition(tab, activeTab);

                    } else if (tab) {

                        tab.set('contentVisible', true);

                    }

                },

                validator: function(value) {

                    var ret = true;

                    if (value && value.get(DISABLED)) { // cannot activate if disabled

                        ret = false;

                    }

                    return ret;

                }

            });

            this.on('activeTabChange', this._onActiveTabChange);

            this.on('activeIndexChange', this._onActiveIndexChange);

            YAHOO.log('attributes initialized', 'info', 'TabView');

            if ( this._tabParent ) {

                this._initTabs();

            }

            // Due to delegation we add all DOM_EVENTS to the TabView container

            // but IE will leak when unsupported events are added, so remove these

            this.DOM_EVENTS.submit = false;

            this.DOM_EVENTS.focus = false;

            this.DOM_EVENTS.blur = false;

            this.DOM_EVENTS.change = false;

            for (var type in this.DOM_EVENTS) {

                if ( YAHOO.lang.hasOwnProperty(this.DOM_EVENTS, type) ) {

                    this.addListener.call(this, type, this.DOMEventHandler);

                }

            }

        },

        /**

         * Removes selected state from the given tab if it is the activeTab

         * @method deselectTab

         * @param {Int} index The tab index to deselect

         */

        deselectTab: function(index) {

            if (this.getTab(index) === this.get(ACTIVE_TAB)) {

                this.set(ACTIVE_TAB, null);

            }

        },

        /**

         * Makes the tab at the given index the active tab

         * @method selectTab

         * @param {Int} index The tab index to be made active

         */

        selectTab: function(index) {

            this.set(ACTIVE_TAB, this.getTab(index));

        },

        _onActiveTabChange: function(e) {

            var activeIndex = this.get(ACTIVE_INDEX),

                newIndex = this.getTabIndex(e.newValue);

            if (activeIndex !== newIndex) {

                if (!(this.set(ACTIVE_INDEX, newIndex)) ) { // NOTE: setting

                     // revert if activeIndex update fails (cancelled via beforeChange)

                    this.set(ACTIVE_TAB, e.prevValue);

                }

            }

        },

        _onActiveIndexChange: function(e) {

            // no set if called from ActiveTabChange event

            if (e.newValue !== this.getTabIndex(this.get(ACTIVE_TAB))) {

                if (!(this.set(ACTIVE_TAB, this.getTab(e.newValue))) ) { // NOTE: setting

                     // revert if activeTab update fails (cancelled via beforeChange)

                    this.set(ACTIVE_INDEX, e.prevValue);

                }

            }

        },

        /**

         * Creates Tab instances from a collection of HTMLElements.

         * @method _initTabs

         * @private

         * @return void

         */

        _initTabs: function() {

            var tabs = Dom.getChildren(this._tabParent),

                contentElements = Dom.getChildren(this._contentParent),

                activeIndex = this.get(ACTIVE_INDEX),

                tab,

                attr,

                active;

            for (var i = 0, len = tabs.length; i < len; ++i) {

                attr = {};

                if (contentElements[i]) {

                    attr.contentEl = contentElements[i];

                }

                tab = new YAHOO.widget.Tab(tabs[i], attr);

                this.addTab(tab);

                if (tab.hasClass(tab.ACTIVE_CLASSNAME) ) {

                    active = tab;

                }

            }

            if (activeIndex != undefined) { // not null or undefined

                this.set(ACTIVE_TAB, this.getTab(activeIndex));

            } else {

                this._configs[ACTIVE_TAB].value = active; // dont invoke method

                this._configs[ACTIVE_INDEX].value = this.getTabIndex(active);

            }

        },

        _createTabViewElement: function(attr) {

            var el = document.createElement('div');

            if ( this.CLASSNAME ) {

                el.className = this.CLASSNAME;

            }

            YAHOO.log('TabView Dom created', 'info', 'TabView');

            return el;

        },

        _createTabParent: function(attr) {

            var el = document.createElement('ul');

            if ( this.TAB_PARENT_CLASSNAME ) {

                el.className = this.TAB_PARENT_CLASSNAME;

            }

            this.get(ELEMENT).appendChild(el);

            return el;

        },

        _createContentParent: function(attr) {

            var el = document.createElement('div');

            if ( this.CONTENT_PARENT_CLASSNAME ) {

                el.className = this.CONTENT_PARENT_CLASSNAME;

            }

            this.get(ELEMENT).appendChild(el);

            return el;

        }

    });

    YAHOO.widget.TabView = TabView;

})();

(function() {

    var Y = YAHOO.util,

        Dom = Y.Dom,

        Lang = YAHOO.lang,

    // STRING CONSTANTS

        ACTIVE_TAB = 'activeTab',

        LABEL = 'label',

        LABEL_EL = 'labelEl',

        CONTENT = 'content',

        CONTENT_EL = 'contentEl',

        ELEMENT = 'element',

        CACHE_DATA = 'cacheData',

        DATA_SRC = 'dataSrc',

        DATA_LOADED = 'dataLoaded',

        DATA_TIMEOUT = 'dataTimeout',

        LOAD_METHOD = 'loadMethod',

        POST_DATA = 'postData',

        DISABLED = 'disabled',

    /**

     * A representation of a Tab's label and content.

     * @namespace YAHOO.widget

     * @class Tab

     * @extends YAHOO.util.Element

     * @constructor

     * @param element {HTMLElement | String} (optional) The html element that

     * represents the Tab. An element will be created if none provided.

     * @param {Object} properties A key map of initial properties

     */

    Tab = function(el, attr) {

        attr = attr || {};

        if (arguments.length == 1 && !Lang.isString(el) && !el.nodeName) {

            attr = el;

            el = attr.element;

        }

        if (!el && !attr.element) {

            el = this._createTabElement(attr);

        }

        this.loadHandler =  {

            success: function(o) {

                this.set(CONTENT, o.responseText);

            },

            failure: function(o) {

            }

        };

        Tab.superclass.constructor.call(this, el, attr);

        this.DOM_EVENTS = {}; // delegating to tabView

    };

    YAHOO.extend(Tab, YAHOO.util.Element, {

        /**

         * The default tag name for a Tab's inner element.

         * @property LABEL_INNER_TAGNAME

         * @type String

         * @default "em"

         */

        LABEL_TAGNAME: 'em',

        /**

         * The class name applied to active tabs.

         * @property ACTIVE_CLASSNAME

         * @type String

         * @default "selected"

         */

        ACTIVE_CLASSNAME: 'selected',

        /**

         * The class name applied to active tabs.

         * @property HIDDEN_CLASSNAME

         * @type String

         * @default "yui-hidden"

         */

        HIDDEN_CLASSNAME: 'yui-hidden',

        /**

         * The title applied to active tabs.

         * @property ACTIVE_TITLE

         * @type String

         * @default "active"

         */

        ACTIVE_TITLE: 'active',

        /**

         * The class name applied to disabled tabs.

         * @property DISABLED_CLASSNAME

         * @type String

         * @default "disabled"

         */

        DISABLED_CLASSNAME: DISABLED,

        /**

         * The class name applied to dynamic tabs while loading.

         * @property LOADING_CLASSNAME

         * @type String

         * @default "disabled"

         */

        LOADING_CLASSNAME: 'loading',

        /**

         * Provides a reference to the connection request object when data is

         * loaded dynamically.

         * @property dataConnection

         * @type Object

         */

        dataConnection: null,

        /**

         * Object containing success and failure callbacks for loading data.

         * @property loadHandler

         * @type object

         */

        loadHandler: null,

        _loading: false,

        /**

         * Provides a readable name for the tab.

         * @method toString

         * @return String

         */

        toString: function() {

            var el = this.get(ELEMENT),

                id = el.id || el.tagName;

            return "Tab " + id;

        },

        /**

         * setAttributeConfigs Tab specific properties.

         * @method initAttributes

         * @param {Object} attr Hash of initial attributes

         */

        initAttributes: function(attr) {

            attr = attr || {};

            Tab.superclass.initAttributes.call(this, attr);

            /**

             * The event that triggers the tab's activation.

             * @attribute activationEvent

             * @type String

             */

            this.setAttributeConfig('activationEvent', {

                value: attr.activationEvent || 'click'

            });

            /**

             * The element that contains the tab's label.

             * @attribute labelEl

             * @type HTMLElement

             */

            this.setAttributeConfig(LABEL_EL, {

                value: attr[LABEL_EL] || this._getLabelEl(),

                method: function(value) {

                    value = Dom.get(value);

                    var current = this.get(LABEL_EL);

                    if (current) {

                        if (current == value) {

                            return false; // already set

                        }

                        current.parentNode.replaceChild(value, current);

                        this.set(LABEL, value.innerHTML);

                    }

                }

            });

            /**

             * The tab's label text (or innerHTML).

             * @attribute label

             * @type String

             */

            this.setAttributeConfig(LABEL, {

                value: attr.label || this._getLabel(),

                method: function(value) {

                    var labelEl = this.get(LABEL_EL);

                    if (!labelEl) { // create if needed

                        this.set(LABEL_EL, this._createLabelEl());

                    }

                    labelEl.innerHTML = value;

                }

            });

            /**

             * The HTMLElement that contains the tab's content.

             * @attribute contentEl

             * @type HTMLElement

             */

            this.setAttributeConfig(CONTENT_EL, {

                value: attr[CONTENT_EL] || document.createElement('div'),

                method: function(value) {

                    value = Dom.get(value);

                    var current = this.get(CONTENT_EL);

                    if (current) {

                        if (current === value) {

                            return false; // already set

                        }

                        if (!this.get('selected')) {

                            Dom.addClass(value, this.HIDDEN_CLASSNAME);

                        }

                        current.parentNode.replaceChild(value, current);

                        this.set(CONTENT, value.innerHTML);

                    }

                }

            });

            /**

             * The tab's content.

             * @attribute content

             * @type String

             */

            this.setAttributeConfig(CONTENT, {

                value: attr[CONTENT] || this.get(CONTENT_EL).innerHTML,

                method: function(value) {

                    this.get(CONTENT_EL).innerHTML = value;

                }

            });

            /**

             * The tab's data source, used for loading content dynamically.

             * @attribute dataSrc

             * @type String

             */

            this.setAttributeConfig(DATA_SRC, {

                value: attr.dataSrc

            });

            /**

             * Whether or not content should be reloaded for every view.

             * @attribute cacheData

             * @type Boolean

             * @default false

             */

            this.setAttributeConfig(CACHE_DATA, {

                value: attr.cacheData || false,

                validator: Lang.isBoolean

            });

            /**

             * The method to use for the data request.

             * @attribute loadMethod

             * @type String

             * @default "GET"

             */

            this.setAttributeConfig(LOAD_METHOD, {

                value: attr.loadMethod || 'GET',

                validator: Lang.isString

            });

            /**

             * Whether or not any data has been loaded from the server.

             * @attribute dataLoaded

             * @type Boolean

             */

            this.setAttributeConfig(DATA_LOADED, {

                value: false,

                validator: Lang.isBoolean,

                writeOnce: true

            });

            /**

             * Number if milliseconds before aborting and calling failure handler.

             * @attribute dataTimeout

             * @type Number

             * @default null

             */

            this.setAttributeConfig(DATA_TIMEOUT, {

                value: attr.dataTimeout || null,

                validator: Lang.isNumber

            });

            /**

             * Arguments to pass when POST method is used

             * @attribute postData

             * @default null

             */

            this.setAttributeConfig(POST_DATA, {

                value: attr.postData || null

            });

            /**

             * Whether or not the tab is currently active.

             * If a dataSrc is set for the tab, the content will be loaded from

             * the given source.

             * @attribute active

             * @type Boolean

             */

            this.setAttributeConfig('active', {

                value: attr.active || this.hasClass(this.ACTIVE_CLASSNAME),

                method: function(value) {

                    if (value === true) {

                        this.addClass(this.ACTIVE_CLASSNAME);

                        this.set('title', this.ACTIVE_TITLE);

                    } else {

                        this.removeClass(this.ACTIVE_CLASSNAME);

                        this.set('title', '');

                    }

                },

                validator: function(value) {

                    return Lang.isBoolean(value) && !this.get(DISABLED) ;

                }

            });

            /**

             * Whether or not the tab is disabled.

             * @attribute disabled

             * @type Boolean

             */

            this.setAttributeConfig(DISABLED, {

                value: attr.disabled || this.hasClass(this.DISABLED_CLASSNAME),

                method: function(value) {

                    if (value === true) {

                        this.addClass(this.DISABLED_CLASSNAME);

                    } else {

                        this.removeClass(this.DISABLED_CLASSNAME);

                    }

                },

                validator: Lang.isBoolean

            });

            /**

             * The href of the tab's anchor element.

             * @attribute href

             * @type String

             * @default '#'

             */

            this.setAttributeConfig('href', {

                value: attr.href ||

                        this.getElementsByTagName('a')[0].getAttribute('href', 2) || '#',

                method: function(value) {

                    this.getElementsByTagName('a')[0].href = value;

                },

                validator: Lang.isString

            });

            /**

             * The Whether or not the tab's content is visible.

             * @attribute contentVisible

             * @type Boolean

             * @default false

             */

            this.setAttributeConfig('contentVisible', {

                value: attr.contentVisible,

                method: function(value) {

                    if (value) {

                        Dom.removeClass(this.get(CONTENT_EL), this.HIDDEN_CLASSNAME);

                        if ( this.get(DATA_SRC) ) {

                         // load dynamic content unless already loading or loaded and caching

                            if ( !this._loading && !(this.get(DATA_LOADED) && this.get(CACHE_DATA)) ) {

                                this._dataConnect();

                            }

                        }

                    } else {

                        Dom.addClass(this.get(CONTENT_EL), this.HIDDEN_CLASSNAME);

                    }

                },

                validator: Lang.isBoolean

            });

            YAHOO.log('attributes initialized', 'info', 'Tab');

        },

        _dataConnect: function() {

            if (!Y.Connect) {

                YAHOO.log('YAHOO.util.Connect dependency not met',

                        'error', 'Tab');

                return false;

            }

            Dom.addClass(this.get(CONTENT_EL).parentNode, this.LOADING_CLASSNAME);

            this._loading = true;

            this.dataConnection = Y.Connect.asyncRequest(

                this.get(LOAD_METHOD),

                this.get(DATA_SRC),

                {

                    success: function(o) {

                        YAHOO.log('content loaded successfully', 'info', 'Tab');

                        this.loadHandler.success.call(this, o);

                        this.set(DATA_LOADED, true);

                        this.dataConnection = null;

                        Dom.removeClass(this.get(CONTENT_EL).parentNode,

                                this.LOADING_CLASSNAME);

                        this._loading = false;

                    },

                    failure: function(o) {

                        YAHOO.log('loading failed: ' + o.statusText, 'error', 'Tab');

                        this.loadHandler.failure.call(this, o);

                        this.dataConnection = null;

                        Dom.removeClass(this.get(CONTENT_EL).parentNode,

                                this.LOADING_CLASSNAME);

                        this._loading = false;

                    },

                    scope: this,

                    timeout: this.get(DATA_TIMEOUT)

                },

                this.get(POST_DATA)

            );

        },

        _createTabElement: function(attr) {

            var el = document.createElement('li'),

                a = document.createElement('a'),

                label = attr.label || null,

                labelEl = attr.labelEl || null;

            a.href = attr.href || '#'; // TODO: Use Dom.setAttribute?

            el.appendChild(a);

            if (labelEl) { // user supplied labelEl

                if (!label) { // user supplied label

                    label = this._getLabel();

                }

            } else {

                labelEl = this._createLabelEl();

            }

            a.appendChild(labelEl);

            YAHOO.log('creating Tab Dom', 'info', 'Tab');

            return el;

        },

        _getLabelEl: function() {

            return this.getElementsByTagName(this.LABEL_TAGNAME)[0];

        },

        _createLabelEl: function() {

            var el = document.createElement(this.LABEL_TAGNAME);

            return el;

        },

        _getLabel: function() {

            var el = this.get(LABEL_EL);

                if (!el) {

                    return undefined;

                }

            return el.innerHTML;

        },

        _onActivate: function(e, tabview) {

            var tab = this,

                silent = false;

            Y.Event.preventDefault(e);

            if (tab === tabview.get(ACTIVE_TAB)) {

                silent = true; // dont fire activeTabChange if already active

            }

            tabview.set(ACTIVE_TAB, tab, silent);

        },

        _onActivationEventChange: function(e) {

            var tab = this;

            if (e.prevValue != e.newValue) {

                tab.removeListener(e.prevValue, tab._onActivate);

                tab.addListener(e.newValue, tab._onActivate, this, tab);

            }

        }

    });

    /**