/*
 * Ext JS Library 2.0
 * Copyright(c) 2006-2007, Ext JS, LLC.
 * licensing@extjs.com
 * 
 * http://extjs.com/license
 */

/**
 * @class Ext.Element
 * Represents an Element in the DOM.<br><br>
 * Usage:<br>
<pre><code>
var el = Ext.get("my-div");

// or with getEl
var el = getEl("my-div");

// or with a DOM element
var el = Ext.get(myDivElement);
</code></pre>
 * Using Ext.get() or getEl() instead of calling the constructor directly ensures you get the same object
 * each call instead of constructing a new one.<br><br>
 * <b>Animations</b><br />
 * Many of the functions for manipulating an element have an optional "animate" parameter. The animate parameter
 * should either be a boolean (true) or an object literal with animation options. Note that the supported Element animation
 * options are a subset of the {@link Ext.Fx} animation options specific to Fx effects.  The Element animation options are:
<pre>
Option    Default   Description
--------- --------  ---------------------------------------------
duration  .35       The duration of the animation in seconds
easing    easeOut   The easing method
callback  none      A function to execute when the anim completes
scope     this      The scope (this) of the callback function
</pre>
* Also, the Anim object being used for the animation will be set on your options object as "anim", which allows you to stop or
* manipulate the animation. Here's an example:
<pre><code>
var el = Ext.get("my-div");

// no animation
el.setWidth(100);

// default animation
el.setWidth(100, true);

// animation with some options set
el.setWidth(100, {
    duration: 1,
    callback: this.foo,
    scope: this
});

// using the "anim" property to get the Anim object
var opt = {
    duration: 1,
    callback: this.foo,
    scope: this
};
el.setWidth(100, opt);
...
if(opt.anim.isAnimated()){
    opt.anim.stop();
}
</code></pre>
* <b> Composite (Collections of) Elements</b><br />
 * For working with collections of Elements, see {@link Ext.CompositeElement}
 * @constructor Create a new Element directly.
 * @param {String/HTMLElement} element
 * @param {Boolean} forceNew (optional) By default the constructor checks to see if there is already an instance of this element in the cache and if there is it returns the same instance. This will skip that check (useful for extending this class).
 */
(function(){
var D = Ext.lib.Dom;
var E = Ext.lib.Event;
var A = Ext.lib.Anim;

// local style camelizing for speed
var propCache = {};
var camelRe = /(-[a-z])/gi;
var camelFn = function(m, a){ return a.charAt(1).toUpperCase(); };
var view = document.defaultView;

Ext.Element = function(element, forceNew){
    var dom = typeof element == "string" ?
            document.getElementById(element) : element;
    if(!dom){ // invalid id/element
        return null;
    }
    var id = dom.id;
    if(forceNew !== true && id && Ext.Element.cache[id]){ // element object already exists
        return Ext.Element.cache[id];
    }

    /**
     * The DOM element
     * @type HTMLElement
     */
    this.dom = dom;

    /**
     * The DOM element ID
     * @type String
     */
    this.id = id || Ext.id(dom);
};

var El = Ext.Element;

El.prototype = {
    /**
     * The element's default display mode  (defaults to "")
     * @type String
     */
    originalDisplay : "",

    visibilityMode : 1,
    /**
     * The default unit to append to CSS values where a unit isn't provided (defaults to px).
     * @type String
     */
    defaultUnit : "px",
    /**
     * Sets the element's visibility mode. When setVisible() is called it
     * will use this to determine whether to set the visibility or the display property.
     * @param visMode Element.VISIBILITY or Element.DISPLAY
     * @return {Ext.Element} this
     */
    setVisibilityMode : function(visMode){
        this.visibilityMode = visMode;
        return this;
    },
    /**
     * Convenience method for setVisibilityMode(Element.DISPLAY)
     * @param {String} display (optional) What to set display to when visible
     * @return {Ext.Element} this
     */
    enableDisplayMode : function(display){
        this.setVisibilityMode(El.DISPLAY);
        if(typeof display != "undefined") this.originalDisplay = display;
        return this;
    },

    /**
     * Looks at this node and then at parent nodes for a match of the passed simple selector (e.g. div.some-class or span:first-child)
     * @param {String} selector The simple selector to test
     * @param {Number/Mixed} maxDepth (optional) The max depth to
            search as a number or element (defaults to 10 || document.body)
     * @param {Boolean} returnEl (optional) True to return a Ext.Element object instead of DOM node
     * @return {HTMLElement} The matching DOM node (or null if no match was found)
     */
    findParent : function(simpleSelector, maxDepth, returnEl){
        var p = this.dom, b = document.body, depth = 0, dq = Ext.DomQuery, stopEl;
        maxDepth = maxDepth || 50;
        if(typeof maxDepth != "number"){
            stopEl = Ext.getDom(maxDepth);
            maxDepth = 10;
        }
        while(p && p.nodeType == 1 && depth < maxDepth && p != b && p != stopEl){
            if(dq.is(p, simpleSelector)){
                return returnEl ? Ext.get(p) : p;
            }
            depth++;
            p = p.parentNode;
        }
        return null;
    },


    /**
     * Looks at parent nodes for a match of the passed simple selector (e.g. div.some-class or span:first-child)
     * @param {String} selector The simple selector to test
     * @param {Number/Mixed} maxDepth (optional) The max depth to
            search as a number or element (defaults to 10 || document.body)
     * @param {Boolean} returnEl (optional) True to return a Ext.Element object instead of DOM node
     * @return {HTMLElement} The matching DOM node (or null if no match was found)
     */
    findParentNode : function(simpleSelector, maxDepth, returnEl){
        var p = Ext.fly(this.dom.parentNode, '_internal');
        return p ? p.findParent(simpleSelector, maxDepth, returnEl) : null;
    },

    /**
     * Walks up the dom looking for a parent node that matches the passed simple selector (e.g. div.some-class or span:first-child).
     * This is a shortcut for findParentNode() that always returns an Ext.Element.
     * @param {String} selector The simple selector to test
     * @param {Number/Mixed} maxDepth (optional) The max depth to
            search as a number or element (defaults to 10 || document.body)
     * @return {Ext.Element} The matching DOM node (or null if no match was found)
     */
    up : function(simpleSelector, maxDepth){
        return this.findParentNode(simpleSelector, maxDepth, true);
    },



    /**
     * Returns true if this element matches the passed simple selector (e.g. div.some-class or span:first-child)
     * @param {String} selector The simple selector to test
     * @return {Boolean} True if this element matches the selector, else false
     */
    is : function(simpleSelector){
        return Ext.DomQuery.is(this.dom, simpleSelector);
    },

    /**
     * Perform animation on this element.
     * @param {Object} args The animation control args
     * @param {Float} duration (optional) How long the animation lasts in seconds (defaults to .35)
     * @param {Function} onComplete (optional) Function to call when animation completes
     * @param {String} easing (optional) Easing method to use (defaults to 'easeOut')
     * @param {String} animType (optional) 'run' is the default. Can also be 'color', 'motion', or 'scroll'
     * @return {Ext.Element} this
     */
    animate : function(args, duration, onComplete, easing, animType){
        this.anim(args, {duration: duration, callback: onComplete, easing: easing}, animType);
        return this;
    },

    /*
     * @private Internal animation call
     */
    anim : function(args, opt, animType, defaultDur, defaultEase, cb){
        animType = animType || 'run';
        opt = opt || {};
        var anim = Ext.lib.Anim[animType](
            this.dom, args,
            (opt.duration || defaultDur) || .35,
            (opt.easing || defaultEase) || 'easeOut',
            function(){
                Ext.callback(cb, this);
                Ext.callback(opt.callback, opt.scope || this, [this, opt]);
            },
            this
        );
        opt.anim = anim;
        return anim;
    },

    // private legacy anim prep
    preanim : function(a, i){
        return !a[i] ? false : (typeof a[i] == "object" ? a[i]: {duration: a[i+1], callback: a[i+2], easing: a[i+3]});
    },

    /**
     * Removes worthless text nodes
     * @param {Boolean} forceReclean (optional) By default the element
     * keeps track if it has been cleaned already so
     * you can call this over and over. However, if you update the element and
     * need to force a reclean, you can pass true.
     */
    clean : function(forceReclean){
        if(this.isCleaned && forceReclean !== true){
            return this;
        }
        var ns = /\S/;
        var d = this.dom, n = d.firstChild, ni = -1;
 	    while(n){
 	        var nx = n.nextSibling;
 	        if(n.nodeType == 3 && !ns.test(n.nodeValue)){
 	            d.removeChild(n);
 	        }else{
 	            n.nodeIndex = ++ni;
 	        }
 	        n = nx;
 	    }
 	    this.isCleaned = true;
 	    return this;
 	},

    /**
     * Scrolls this element into view within the passed container.
     * @param {Mixed} container (optional) The container element to scroll (defaults to document.body)
     * @param {Boolean} hscroll (optional) False to disable horizontal scroll (defaults to true)
     * @return {Ext.Element} this
     */
    scrollIntoView : function(container, hscroll){
        var c = Ext.getDom(container) || Ext.getBody().dom;
        var el = this.dom;

        var o = this.getOffsetsTo(c),
            l = o[0] + c.scrollLeft,
            t = o[1] + c.scrollTop,
            b = t+el.offsetHeight,
            r = l+el.offsetWidth;

        var ch = c.clientHeight;
        var ct = parseInt(c.scrollTop, 10);
        var cl = parseInt(c.scrollLeft, 10);
        var cb = ct + ch;
        var cr = cl + c.clientWidth;

        if(el.offsetHeight > ch || t < ct){
        	c.scrollTop = t;
        }else if(b > cb){
            c.scrollTop = b-ch;
        }
        c.scrollTop = c.scrollTop; // corrects IE, other browsers will ignore

        if(hscroll !== false){
			if(el.offsetWidth > c.clientWidth || l < cl){
                c.scrollLeft = l;
            }else if(r > cr){
                c.scrollLeft = r-c.clientWidth;
            }
            c.scrollLeft = c.scrollLeft;
        }
        return this;
    },

    // private
    scrollChildIntoView : function(child, hscroll){
        Ext.fly(child, '_scrollChildIntoView').scrollIntoView(this, hscroll);
    },

    /**
     * Measures the element's content height and updates height to match. Note: this function uses setTimeout so
     * the new height may not be available immediately.
     * @param {Boolean} animate (optional) Animate the transition (defaults to false)
     * @param {Float} duration (optional) Length of the animation in seconds (defaults to .35)
     * @param {Function} onComplete (optional) Function to call when animation completes
     * @param {String} easing (optional) Easing method to use (defaults to easeOut)
     * @return {Ext.Element} this
     */
    autoHeight : function(animate, duration, onComplete, easing){
        var oldHeight = this.getHeight();
        this.clip();
        this.setHeight(1); // force clipping
        setTimeout(function(){
            var height = parseInt(this.dom.scrollHeight, 10); // parseInt for Safari
            if(!animate){
                this.setHeight(height);
                this.unclip();
                if(typeof onComplete == "function"){
                    onComplete();
                }
            }else{
                this.setHeight(oldHeight); // restore original height
                this.setHeight(height, animate, duration, function(){
                    this.unclip();
                    if(typeof onComplete == "function") onComplete();
                }.createDelegate(this), easing);
            }
        }.createDelegate(this), 0);
        return this;
    },

    /**
     * Returns true if this element is an ancestor of the passed element
     * @param {HTMLElement/String} el The element to check
     * @return {Boolean} True if this element is an ancestor of el, else false
     */
    contains : function(el){
        if(!el){return false;}
        return D.isAncestor(this.dom, el.dom ? el.dom : el);
    },

    /**
     * Checks whether the element is currently visible using both visibility and display properties.
     * @param {Boolean} deep (optional) True to walk the dom and see if parent elements are hidden (defaults to false)
     * @return {Boolean} True if the element is currently visible, else false
     */
    isVisible : function(deep) {
        var vis = !(this.getStyle("visibility") == "hidden" || this.getStyle("display") == "none");
        if(deep !== true || !vis){
            return vis;
        }
        var p = this.dom.parentNode;
        while(p && p.tagName.toLowerCase() != "body"){
            if(!Ext.fly(p, '_isVisible').isVisible()){
                return false;
            }
            p = p.parentNode;
        }
        return true;
    },

    /**
     * Creates a {@link Ext.CompositeElement} for child nodes based on the passed CSS selector (the selector should not contain an id).
     * @param {String} selector The CSS selector
     * @param {Boolean} unique (optional) True to create a unique Ext.Element for each child (defaults to false, which creates a single shared flyweight object)
     * @return {CompositeElement/CompositeElementLite} The composite element
     */
    select : function(selector, unique){
        return El.select(selector, unique, this.dom);
    },

    /**
     * Selects child nodes based on the passed CSS selector (the selector should not contain an id).
     * @param {String} selector The CSS selector
     * @return {Array} An array of the matched nodes
     */
    query : function(selector, unique){
        return Ext.DomQuery.select(selector, this.dom);
    },

    /**
     * Selects a single child at any depth below this element based on the passed CSS selector (the selector should not contain an id).
     * @param {String} selector The CSS selector
     * @param {Boolean} returnDom (optional) True to return the DOM node instead of Ext.Element (defaults to false)
     * @return {HTMLElement/Ext.Element} The child Ext.Element (or DOM node if returnDom = true)
     */
    child : function(selector, returnDom){
        var n = Ext.DomQuery.selectNode(selector, this.dom);
        return returnDom ? n : Ext.get(n);
    },

    /**
     * Selects a single *direct* child based on the passed CSS selector (the selector should not contain an id).
     * @param {String} selector The CSS selector
     * @param {Boolean} returnDom (optional) True to return the DOM node instead of Ext.Element (defaults to false)
     * @return {HTMLElement/Ext.Element} The child Ext.Element (or DOM node if returnDom = true)
     */
    down : function(selector, returnDom){
        var n = Ext.DomQuery.selectNode(" > " + selector, this.dom);
        return returnDom ? n : Ext.get(n);
    },

    /**
     * Initializes a {@link Ext.dd.DD} drag drop object for this element.
     * @param {String} group The group the DD object is member of
     * @param {Object} config The DD config object
     * @param {Object} overrides An object containing methods to override/implement on the DD object
     * @return {Ext.dd.DD} The DD object
     */
    initDD : function(group, config, overrides){
        var dd = new Ext.dd.DD(Ext.id(this.dom), group, config);
        return Ext.apply(dd, overrides);
    },

    /**
     * Initializes a {@link Ext.dd.DDProxy} object for this element.
     * @param {String} group The group the DDProxy object is member of
     * @param {Object} config The DDProxy config object
     * @param {Object} overrides An object containing methods to override/implement on the DDProxy object
     * @return {Ext.dd.DDProxy} The DDProxy object
     */
    initDDProxy : function(group, config, overrides){
        var dd = new Ext.dd.DDProxy(Ext.id(this.dom), group, config);
        return Ext.apply(dd, overrides);
    },

    /**
     * Initializes a {@link Ext.dd.DDTarget} object for this element.
     * @param {String} group The group the DDTarget object is member of
     * @param {Object} config The DDTarget config object
     * @param {Object} overrides An object containing methods to override/implement on the DDTarget object
     * @return {Ext.dd.DDTarget} The DDTarget object
     */
    initDDTarget : function(group, config, overrides){
        var dd = new Ext.dd.DDTarget(Ext.id(this.dom), group, config);
        return Ext.apply(dd, overrides);
    },

    /**
     * Sets the visibility of the element (see details). If the visibilityMode is set to Element.DISPLAY, it will use
     * the display property to hide the element, otherwise it uses visibility. The default is to hide and show using the visibility property.
     * @param {Boolean} visible Whether the element is visible
     * @param {Boolean/Object} animate (optional) True for the default animation, or a standard Element animation config object
     * @return {Ext.Element} this
     */
     setVisible : function(visible, animate){
        if(!animate || !A){
            if(this.visibilityMode == El.DISPLAY){
                this.setDisplayed(visible);
            }else{
                this.fixDisplay();
                this.dom.style.visibility = visible ? "visible" : "hidden";
            }
        }else{
            // closure for composites
            var dom = this.dom;
            var visMode = this.visibilityMode;
            if(visible){
                this.setOpacity(.01);
                this.setVisible(true);
            }
            this.anim({opacity: { to: (visible?1:0) }},
                  this.preanim(arguments, 1),
                  null, .35, 'easeIn', function(){
                     if(!visible){
                         if(visMode == El.DISPLAY){
                             dom.style.display = "none";
                         }else{
                             dom.style.visibility = "hidden";
                         }
                         Ext.get(dom).setOpacity(1);
                     }
                 });
        }
        return this;
    },

    /**
     * Returns true if display is not "none"
     * @return {Boolean}
     */
    isDisplayed : function() {
        return this.getStyle("display") != "none";
    },

    /**
     * Toggles the element's visibility or display, depending on visibility mode.
     * @param {Boolean/Object} animate (optional) True for the default animation, or a standard Element animation config object
     * @return {Ext.Element} this
     */
    toggle : function(animate){
        this.setVisible(!this.isVisible(), this.preanim(arguments, 0));
        return this;
    },

    /**
     * Sets the CSS display property. Uses originalDisplay if the specified value is a boolean true.
     * @param {Mixed} value Boolean value to display the element using its default display, or a string to set the display directly.
     * @return {Ext.Element} this
     */
    setDisplayed : function(value) {
        if(typeof value == "boolean"){
           value = value ? this.originalDisplay : "none";
        }
        this.setStyle("display", value);
        return this;
    },

    /**
     * Tries to focus the element. Any exceptions are caught and ignored.
     * @return {Ext.Element} this
     */
    focus : function() {
        try{
            this.dom.focus();
        }catch(e){}
        return this;
    },

    /**
     * Tries to blur the element. Any exceptions are caught and ignored.
     * @return {Ext.Element} this
     */
    blur : function() {
        try{
            this.dom.blur();
        }catch(e){}
        return this;
    },

    /**
     * Adds one or more CSS classes to the element. Duplicate classes are automatically filtered out.
     * @param {String/Array} className The CSS class to add, or an array of classes
     * @return {Ext.Element} this
     */
    addClass : function(className){
        if(className instanceof Array){
            for(var i = 0, len = className.length; i < len; i++) {
            	this.addClass(className[i]);
            }
        }else{
            if(className && !this.hasClass(className)){
                this.dom.className = this.dom.className + " " + className;
            }
        }
        return this;
    },

    /**
     * Adds one or more CSS classes to this element and removes the same class(es) from all siblings.
     * @param {String/Array} className The CSS class to add, or an array of classes
     * @return {Ext.Element} this
     */
    radioClass : function(className){
        var siblings = this.dom.parentNode.childNodes;
        for(var i = 0; i < siblings.length; i++) {
        	var s = siblings[i];
        	if(s.nodeType == 1){
        	    Ext.get(s).removeClass(className);
        	}
        }
        this.addClass(className);
        return this;
    },

    /**
     * Removes one or more CSS classes from the element.
     * @param {String/Array} className The CSS class to remove, or an array of classes
     * @return {Ext.Element} this
     */
    removeClass : function(className){
        if(!className || !this.dom.className){
            return this;
        }
        if(className instanceof Array){
            for(var i = 0, len = className.length; i < len; i++) {
            	this.removeClass(className[i]);
            }
        }else{
            if(this.hasClass(className)){
                var re = this.classReCache[className];
                if (!re) {
                   re = new RegExp('(?:^|\\s+)' + className + '(?:\\s+|$)', "g");
                   this.classReCache[className] = re;
                }
                this.dom.className =
                    this.dom.className.replace(re, " ");
            }
        }
        return this;
    },

    // private
    classReCache: {},

    /**
     * Toggles the specified CSS class on this element (removes it if it already exists, otherwise adds it).
     * @param {String} className The CSS class to toggle
     * @return {Ext.Element} this
     */
    toggleClass : function(className){
        if(this.hasClass(className)){
            this.removeClass(className);
        }else{
            this.addClass(className);
        }
        return this;
    },

    /**
     * Checks if the specified CSS class exists on this element's DOM node.
     * @param {String} className The CSS class to check for
     * @return {Boolean} True if the class exists, else false
     */
    hasClass : function(className){
        return className && (' '+this.dom.className+' ').indexOf(' '+className+' ') != -1;
    },

    /**
     * Replaces a CSS class on the element with another.  If the old name does not exist, the new name will simply be added.
     * @param {String} oldClassName The CSS class to replace
     * @param {String} newClassName The replacement CSS class
     * @return {Ext.Element} this
     */
    replaceClass : function(oldClassName, newClassName){
        this.removeClass(oldClassName);
        this.addClass(newClassName);
        return this;
    },

    /**
     * Returns an object with properties matching the styles requested.
     * For example, el.getStyles('color', 'font-size', 'width') might return
     * {'color': '#FFFFFF', 'font-size': '13px', 'width': '100px'}.
     * @param {String} style1 A style name
     * @param {String} style2 A style name
     * @param {String} etc.
     * @return {Object} The style object
     */
    getStyles : function(){
        var a = arguments, len = a.length, r = {};
        for(var i = 0; i < len; i++){
            r[a[i]] = this.getStyle(a[i]);
        }
        return r;
    },

    /**
     * Normalizes currentStyle and computedStyle.
     * @param {String} property The style property whose value is returned.
     * @return {String} The current value of the style property for this element.
     */
    getStyle : function(){
        return view && view.getComputedStyle ?
            function(prop){
                var el = this.dom, v, cs, camel;
                if(prop == 'float'){
                    prop = "cssFloat";
                }
                if(v = el.style[prop]){
                    return v;
                }
                if(cs = view.getComputedStyle(el, "")){
                    if(!(camel = propCache[prop])){
                        camel = propCache[prop] = prop.replace(camelRe, camelFn);
                    }
                    return cs[camel];
                }
                return null;
            } :
            function(prop){
                var el = this.dom, v, cs, camel;
                if(prop == 'opacity'){
                    if(typeof el.style.filter == 'string'){
                        var m = el.style.filter.match(/alpha\(opacity=(.*)\)/i);
                        if(m){
                            var fv = parseFloat(m[1]);
                            if(!isNaN(fv)){
                                return fv ? fv / 100 : 0;
                            }
                        }
                    }
                    return 1;
                }else if(prop == 'float'){
                    prop = "styleFloat";
                }
                if(!(camel = propCache[prop])){
                    camel = propCache[prop] = prop.replace(camelRe, camelFn);
                }
                if(v = el.style[camel]){
                    return v;
                }
                if(cs = el.currentStyle){
                    return cs[camel];
                }
                return null;
            };
    }(),

    /**
     * Wrapper for setting style properties, also takes single object parameter of multiple styles.
     * @param {String/Object} property The style property to be set, or an object of multiple styles.
     * @param {String} value (optional) The value to apply to the given property, or null if an object was passed.
     * @return {Ext.Element} this
     */
    setStyle : function(prop, value){
        if(typeof prop == "string"){
            var camel;
            if(!(camel = propCache[prop])){
                camel = propCache[prop] = prop.replace(camelRe, camelFn);
            }
            if(camel == 'opacity') {
                this.setOpacity(value);
            }else{
                this.dom.style[camel] = value;
            }
        }else{
            for(var style in prop){
                if(typeof prop[style] != "function"){
                   this.setStyle(style, prop[style]);
                }
            }
        }
        return this;
    },

    /**
     * More flexible version of {@link #setStyle} for setting style properties.
     * @param {String/Object/Function} styles A style specification string, e.g. "width:100px", or object in the form {width:"100px"}, or
     * a function which returns such a specification.
     * @return {Ext.Element} this
     */
    applyStyles : function(style){
        Ext.DomHelper.applyStyles(this.dom, style);
        return this;
    },

    /**
      * Gets the current X position of the element based on page coordinates.  Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
      * @return {Number} The X position of the element
      */
    getX : function(){
        return D.getX(this.dom);
    },

    /**
      * Gets the current Y position of the element based on page coordinates.  Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
      * @return {Number} The Y position of the element
      */
    getY : function(){
        return D.getY(this.dom);
    },

    /**
      * Gets the current position of the element based on page coordinates.  Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
      * @return {Array} The XY position of the element
      */
    getXY : function(){
        return D.getXY(this.dom);
    },

    /**
      * Returns the offsets of this element from the passed element. Both element must be part of the DOM tree and not have display:none to have page coordinates.
      * @param {Mixed} element The element to get the offsets from.
      * @return {Array} The XY page offsets (e.g. [100, -200])
      */
    getOffsetsTo : function(el){
        var o = this.getXY();
        var e = Ext.fly(el, '_internal').getXY();
        return [o[0]-e[0],o[1]-e[1]];
    },

    /**
     * Sets the X position of the element based on page coordinates.  Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
     * @param {Number} The X position of the element
     * @param {Boolean/Object} animate (optional) True for the default animation, or a standard Element animation config object
     * @return {Ext.Element} this
     */
    setX : function(x, animate){
        if(!animate || !A){
            D.setX(this.dom, x);
        }else{
            this.setXY([x, this.getY()], this.preanim(arguments, 1));
        }
        return this;
    },

    /**
     * Sets the Y position of the element based on page coordinates.  Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
     * @param {Number} The Y position of the element
     * @param {Boolean/Object} animate (optional) True for the default animation, or a standard Element animation config object
     * @return {Ext.Element} this
     */
    setY : function(y, animate){
        if(!animate || !A){
            D.setY(this.dom, y);
        }else{
            this.setXY([this.getX(), y], this.preanim(arguments, 1));
        }
        return this;
    },

    /**
     * Sets the element's left position directly using CSS style (instead of {@link #setX}).
     * @param {String} left The left CSS property value
     * @return {Ext.Element} this
     */
    setLeft : function(left){
        this.setStyle("left", this.addUnits(left));
        return this;
    },

    /**
     * Sets the element's top position directly using CSS style (instead of {@link #setY}).
     * @param {String} top The top CSS property value
     * @return {Ext.Element} this
     */
    setTop : function(top){
        this.setStyle("top", this.addUnits(top));
        return this;
    },

    /**
     * Sets the element's CSS right style.
     * @param {String} right The right CSS property value
     * @return {Ext.Element} this
     */
    setRight : function(right){
        this.setStyle("right", this.addUnits(right));
        return this;
    },

    /**
     * Sets the element's CSS bottom style.
     * @param {String} bottom The bottom CSS property value
     * @return {Ext.Element} this
     */
    setBottom : function(bottom){
        this.setStyle("bottom", this.addUnits(bottom));
        return this;
    },

    /**
     * Sets the position of the element in page coordinates, regardless of how the element is positioned.
     * The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
     * @param {Array} pos Contains X & Y [x, y] values for new position (coordinates are page-based)
     * @param {Boolean/Object} animate (optional) True for the default animation, or a standard Element animation config object
     * @return {Ext.Element} this
     */
    setXY : function(pos, animate){
        if(!animate || !A){
            D.setXY(this.dom, pos);
        }else{
            this.anim({points: {to: pos}}, this.preanim(arguments, 1), 'motion');
        }
        return this;
    },

    /**
     * Sets the position of the element in page coordinates, regardless of how the element is positioned.
     * The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
     * @param {Number} x X value for new position (coordinates are page-based)
     * @param {Number} y Y value for new position (coordinates are page-based)
     * @param {Boolean/Object} animate (optional) True for the default animation, or a standard Element animation config object
     * @return {Ext.Element} this
     */
    setLocation : function(x, y, animate){
        this.setXY([x, y], this.preanim(arguments, 2));
        return this;
    },

    /**
     * Sets the position of the element in page coordinates, regardless of how the element is positioned.
     * The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
     * @param {Number} x X value for new position (coordinates are page-based)
     * @param {Number} y Y value for new position (coordinates are page-based)
     * @param {Boolean/Object} animate (optional) True for the default animation, or a standard Element animation config object
     * @return {Ext.Element} this
     */
    moveTo : function(x, y, animate){
        this.setXY([x, y], this.preanim(arguments, 2));
        return this;
    },

    /**
     * Returns the region of the given element.
     * The element must be part of the DOM tree to have a region (display:none or elements not appended return false).
     * @return {Region} A Ext.lib.Region containing "top, left, bottom, right" member data.
     */
    getRegion : function(){
        return D.getRegion(this.dom);
    },

    /**
     * Returns the offset height of the element
     * @param {Boolean} contentHeight (optional) true to get the height minus borders and padding
     * @return {Number} The element's height
     */
    getHeight : function(contentHeight){
        var h = this.dom.offsetHeight || 0;
        h = contentHeight !== true ? h : h-this.getBorderWidth("tb")-this.getPadding("tb");
        return h < 0 ? 0 : h;
    },

    /**
     * Returns the offset width of the element
     * @param {Boolean} contentWidth (optional) true to get the width minus borders and padding
     * @return {Number} The element's width
     */
    getWidth : function(contentWidth){
        var w = this.dom.offsetWidth || 0;
        w = contentWidth !== true ? w : w-this.getBorderWidth("lr")-this.getPadding("lr");
        return w < 0 ? 0 : w;
    },

    /**
     * Returns either the offsetHeight or the height of this element based on CSS height adjusted by padding or borders
     * when needed to simulate offsetHeight when offsets aren't available. This may not work on display:none elements
     * if a height has not been set using CSS.
     * @return {Number}
     */
    getComputedHeight : function(){
        var h = Math.max(this.dom.offsetHeight, this.dom.clientHeight);
        if(!h){
            h = parseInt(this.getStyle('height'), 10) || 0;
            if(!this.isBorderBox()){
                h += this.getFrameWidth('tb');
            }
        }
        return h;
    },

    /**
     * Returns either the offsetWidth or the width of this element based on CSS width adjusted by padding or borders
     * when needed to simulate offsetWidth when offsets aren't available. This may not work on display:none elements
     * if a width has not been set using CSS.
     * @return {Number}
     */
    getComputedWidth : function(){
        var w = Math.max(this.dom.offsetWidth, this.dom.clientWidth);
        if(!w){
            w = parseInt(this.getStyle('width'), 10) || 0;
            if(!this.isBorderBox()){
                w += this.getFrameWidth('lr');
            }
        }
        return w;
    },

    /**
     * Returns the size of the element.
     * @param {Boolean} contentSize (optional) true to get the width/size minus borders and padding
     * @return {Object} An object containing the element's size {width: (element width), height: (element height)}
     */
    getSize : function(contentSize){
        return {width: this.getWidth(contentSize), height: this.getHeight(contentSize)};
    },

    getStyleSize : function(){
        var w, h, d = this.dom, s = d.style;
        if(s.width && s.width != 'auto'){
            w = parseInt(s.width, 10);
            if(Ext.isBorderBox){
               w -= this.getFrameWidth('lr');
            }
        }
        if(s.height && s.height != 'auto'){
            h = parseInt(s.height, 10);
            if(Ext.isBorderBox){
               h -= this.getFrameWidth('tb');
            }
        }
        return {width: w || this.getWidth(true), height: h || this.getHeight(true)};

    },

    /**
     * Returns the width and height of the viewport.
     * @return {Object} An object containing the viewport's size {width: (viewport width), height: (viewport height)}
     */
    getViewSize : function(){
        var d = this.dom, doc = document, aw = 0, ah = 0;
        if(d == doc || d == doc.body){
            return {width : D.getViewWidth(), height: D.getViewHeight()};
        }else{
            return {
                width : d.clientWidth,
                height: d.clientHeight
            };
        }
    },

    /**
     * Returns the value of the "value" attribute
     * @param {Boolean} asNumber true to parse the value as a number
     * @return {String/Number}
     */
    getValue : function(asNumber){
        return asNumber ? parseInt(this.dom.value, 10) : this.dom.value;
    },

    // private
    adjustWidth : function(width){
        if(typeof width == "number"){
            if(this.autoBoxAdjust && !this.isBorderBox()){
               width -= (this.getBorderWidth("lr") + this.getPadding("lr"));
            }
            if(width < 0){
                width = 0;
            }
        }
        return width;
    },

    // private
    adjustHeight : function(height){
        if(typeof height == "number"){
           if(this.autoBoxAdjust && !this.isBorderBox()){
               height -= (this.getBorderWidth("tb") + this.getPadding("tb"));
           }
           if(height < 0){
               height = 0;
           }
        }
        return height;
    },

    /**
     * Set the width of the element
     * @param {Number} width The new width
     * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
     * @return {Ext.Element} this
     */
    setWidth : function(width, animate){
        width = this.adjustWidth(width);
        if(!animate || !A){
            this.dom.style.width = this.addUnits(width);
        }else{
            this.anim({width: {to: width}}, this.preanim(arguments, 1));
        }
        return this;
    },

    /**
     * Set the height of the element
     * @param {Number} height The new height
     * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
     * @return {Ext.Element} this
     */
     setHeight : function(height, animate){
        height = this.adjustHeight(height);
        if(!animate || !A){
            this.dom.style.height = this.addUnits(height);
        }else{
            this.anim({height: {to: height}}, this.preanim(arguments, 1));
        }
        return this;
    },

    /**
     * Set the size of the element. If animation is true, both width an height will be animated concurrently.
     * @param {Number} width The new width
     * @param {Number} height The new height
     * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
     * @return {Ext.Element} this
     */
     setSize : function(width, height, animate){
        if(typeof width == "object"){ // in case of object from getSize()
            height = width.height; width = width.width;
        }
        width = this.adjustWidth(width); height = this.adjustHeight(height);
        if(!animate || !A){
            this.dom.style.width = this.addUnits(width);
            this.dom.style.height = this.addUnits(height);
        }else{
            this.anim({width: {to: width}, height: {to: height}}, this.preanim(arguments, 2));
        }
        return this;
    },

    /**
     * Sets the element's position and size in one shot. If animation is true then width, height, x and y will be animated concurrently.
     * @param {Number} x X value for new position (coordinates are page-based)
     * @param {Number} y Y value for new position (coordinates are page-based)
     * @param {Number} width The new width
     * @param {Number} height The new height
     * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
     * @return {Ext.Element} this
     */
    setBounds : function(x, y, width, height, animate){
        if(!animate || !A){
            this.setSize(width, height);
            this.setLocation(x, y);
        }else{
            width = this.adjustWidth(width); height = this.adjustHeight(height);
            this.anim({points: {to: [x, y]}, width: {to: width}, height: {to: height}},
                          this.preanim(arguments, 4), 'motion');
        }
        return this;
    },

    /**
     * Sets the element's position and size the the specified region. If animation is true then width, height, x and y will be animated concurrently.
     * @param {Ext.lib.Region} region The region to fill
     * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
     * @return {Ext.Element} this
     */
    setRegion : function(region, animate){
        this.setBounds(region.left, region.top, region.right-region.left, region.bottom-region.top, this.preanim(arguments, 1));
        return this;
    },

    /**
     * Appends an event handler to this element.  The shorthand version {@link #on} is equivalent.
     * @param {String} eventName The type of event to handle
     * @param {Function} fn The handler function the event invokes
     * @param {Object} scope (optional) The scope (this element) of the handler function
     * @param {Object} options (optional) An object containing handler configuration properties.
     * This may contain any of the following properties:<ul>
     * <li>scope {Object} : The scope in which to execute the handler function. The handler function's "this" context.</li>
     * <li>delegate {String} : A simple selector to filter the target or look for a descendant of the target</li>
     * <li>stopEvent {Boolean} : True to stop the event. That is stop propagation, and prevent the default action.</li>
     * <li>preventDefault {Boolean} : True to prevent the default action</li>
     * <li>stopPropagation {Boolean} : True to prevent event propagation</li>
     * <li>normalized {Boolean} : False to pass a browser event to the handler function instead of an Ext.EventObject</li>
     * <li>delay {Number} : The number of milliseconds to delay the invocation of the handler after te event fires.</li>
     * <li>single {Boolean} : True to add a handler to handle just the next firing of the event, and then remove itself.</li>
     * <li>buffer {Number} : Causes the handler to be scheduled to run in an {@link Ext.util.DelayedTask} delayed
     * by the specified number of milliseconds. If the event fires again within that time, the original
     * handler is <em>not</em> invoked, but the new handler is scheduled in its place.</li>
     * </ul><br>
     * <p>
     * <b>Combining Options</b><br>
     * In the following examples, the shorthand form {@link #on} is used rather than the more verbose
     * addListener.  The two are equivalent.  Using the options argument, it is possible to combine different
     * types of listeners:<br>
     * <br>
     * A normalized, delayed, one-time listener that auto stops the event and passes a custom argument (forumId)<div style="margin: 5px 20px 20px;">
     * Code:<pre><code>
el.on('click', this.onClick, this, {
    single: true,
    delay: 100,
    stopEvent : true,
    forumId: 4
});</code></pre>
     * <p>
     * <b>Attaching multiple handlers in 1 call</b><br>
      * The method also allows for a single argument to be passed which is a config object containing properties
     * which specify multiple handlers.
     * <p>
     * Code:<pre><code>
el.on({
    'click' : {
        fn: this.onClick,
        scope: this,
        delay: 100
    },
    'mouseover' : {
        fn: this.onMouseOver,
        scope: this
    },
    'mouseout' : {
        fn: this.onMouseOut,
        scope: this
    }
});</code></pre>
     * <p>
     * Or a shorthand syntax:<br>
     * Code:<pre><code>
el.on({
    'click' : this.onClick,
    'mouseover' : this.onMouseOver,
    'mouseout' : this.onMouseOut,
    scope: this
});</code></pre>
     */
    addListener : function(eventName, fn, scope, options){
        Ext.EventManager.on(this.dom,  eventName, fn, scope || this, options);
    },

    /**
     * Removes an event handler from this element.  The shorthand version {@link #un} is equivalent.  Example:
     * <pre><code>
el.removeListener('click', this.handlerFn);
// or
el.un('click', this.handlerFn);
</code></pre>
     * @param {String} eventName the type of event to remove
     * @param {Function} fn the method the event invokes
     * @return {Ext.Element} this
     */
    removeListener : function(eventName, fn){
        Ext.EventManager.removeListener(this.dom,  eventName, fn);
        return this;
    },

    /**
     * Removes all previous added listeners from this element
     * @return {Ext.Element} this
     */
    removeAllListeners : function(){
        E.purgeElement(this.dom);
        return this;
    },

    /**
     * Create an event handler on this element such that when the event fires and is handled by this element,
     * it will be relayed to another object (i.e., fired again as if it originated from that object instead).
     * @param {String} eventName The type of event to relay
     * @param {Object} object Any object that extends {@link Ext.util.Observable} that will provide the context
     * for firing the relayed event
     */
    relayEvent : function(eventName, observable){
        this.on(eventName, function(e){
            observable.fireEvent(eventName, e);
        });
    },

    /**
     * Set the opacity of the element
     * @param {Float} opacity The new opacity. 0 = transparent, .5 = 50% visibile, 1 = fully visible, etc
     * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
     * @return {Ext.Element} this
     */
     setOpacity : function(opacity, animate){
        if(!animate || !A){
            var s = this.dom.style;
            if(Ext.isIE){
                s.zoom = 1;
                s.filter = (s.filter || '').replace(/alpha\([^\)]*\)/gi,"") +
                           (opacity == 1 ? "" : " alpha(opacity=" + opacity * 100 + ")");
            }else{
                s.opacity = opacity;
            }
        }else{
            this.anim({opacity: {to: opacity}}, this.preanim(arguments, 1), null, .35, 'easeIn');
        }
        return this;
    },

    /**
     * Gets the left X coordinate
     * @param {Boolean} local True to get the local css position instead of page coordinate
     * @return {Number}
     */
    getLeft : function(local){
        if(!local){
            return this.getX();
        }else{
            return parseInt(this.getStyle("left"), 10) || 0;
        }
    },

    /**
     * Gets the right X coordinate of the element (element X position + element width)
     * @param {Boolean} local True to get the local css position instead of page coordinate
     * @return {Number}
     */
    getRight : function(local){
        if(!local){
            return this.getX() + this.getWidth();
        }else{
            return (this.getLeft(true) + this.getWidth()) || 0;
        }
    },

    /**
     * Gets the top Y coordinate
     * @param {Boolean} local True to get the local css position instead of page coordinate
     * @return {Number}
     */
    getTop : function(local) {
        if(!local){
            return this.getY();
        }else{
            return parseInt(this.getStyle("top"), 10) || 0;
        }
    },

    /**
     * Gets the bottom Y coordinate of the element (element Y position + element height)
     * @param {Boolean} local True to get the local css position instead of page coordinate
     * @return {Number}
     */
    getBottom : function(local){
        if(!local){
            return this.getY() + this.getHeight();
        }else{
            return (this.getTop(true) + this.getHeight()) || 0;
        }
    },

    /**
    * Initializes positioning on this element. If a desired position is not passed, it will make the
    * the element positioned relative IF it is not already positioned.
    * @param {String} pos (optional) Positioning to use "relative", "absolute" or "fixed"
    * @param {Number} zIndex (optional) The zIndex to apply
    * @param {Number} x (optional) Set the page X position
    * @param {Number} y (optional) Set the page Y position
    */
    position : function(pos, zIndex, x, y){
        if(!pos){
           if(this.getStyle('position') == 'static'){
               this.setStyle('position', 'relative');
           }
        }else{
            this.setStyle("position", pos);
        }
        if(zIndex){
            this.setStyle("z-index", zIndex);
        }
        if(x !== undefined && y !== undefined){
            this.setXY([x, y]);
        }else if(x !== undefined){
            this.setX(x);
        }else if(y !== undefined){
            this.setY(y);
        }
    },

    /**
    * Clear positioning back to the default when the document was loaded
    * @param {String} value (optional) The value to use for the left,right,top,bottom, defaults to '' (empty string). You could use 'auto'.
    * @return {Ext.Element} this
     */
    clearPositioning : function(value){
        value = value ||'';
        this.setStyle({
            "left": value,
            "right": value,
            "top": value,
            "bottom": value,
            "z-index": "",
            "position" : "static"
        });
        return this;
    },

    /**
    * Gets an object with all CSS positioning properties. Useful along with setPostioning to get
    * snapshot before performing an update and then restoring the element.
    * @return {Object}
    */
    getPositioning : function(){
        var l = this.getStyle("left");
        var t = this.getStyle("top");
        return {
            "position" : this.getStyle("position"),
            "left" : l,
            "right" : l ? "" : this.getStyle("right"),
            "top" : t,
            "bottom" : t ? "" : this.getStyle("bottom"),
            "z-index" : this.getStyle("z-index")
        };
    },

    /**
     * Gets the width of the border(s) for the specified side(s)
     * @param {String} side Can be t, l, r, b or any combination of those to add multiple values. For example,
     * passing lr would get the border (l)eft width + the border (r)ight width.
     * @return {Number} The width of the sides passed added together
     */
    getBorderWidth : function(side){
        return this.addStyles(side, El.borders);
    },

    /**
     * Gets the width of the padding(s) for the specified side(s)
     * @param {String} side Can be t, l, r, b or any combination of those to add multiple values. For example,
     * passing lr would get the padding (l)eft + the padding (r)ight.
     * @return {Number} The padding of the sides passed added together
     */
    getPadding : function(side){
        return this.addStyles(side, El.paddings);
    },

    /**
    * Set positioning with an object returned by getPositioning().
    * @param {Object} posCfg
    * @return {Ext.Element} this
     */
    setPositioning : function(pc){
        this.applyStyles(pc);
        if(pc.right == "auto"){
            this.dom.style.right = "";
        }
        if(pc.bottom == "auto"){
            this.dom.style.bottom = "";
        }
        return this;
    },

    // private
    fixDisplay : function(){
        if(this.getStyle("display") == "none"){
            this.setStyle("visibility", "hidden");
            this.setStyle("display", this.originalDisplay); // first try reverting to default
            if(this.getStyle("display") == "none"){ // if that fails, default to block
                this.setStyle("display", "block");
            }
        }
    },

    /**
     * Quick set left and top adding default units
     * @param {String} left The left CSS property value
     * @param {String} top The top CSS property value
     * @return {Ext.Element} this
     */
     setLeftTop : function(left, top){
        this.dom.style.left = this.addUnits(left);
        this.dom.style.top = this.addUnits(top);
        return this;
    },

    /**
     * Move this element relative to its current position.
     * @param {String} direction Possible values are: "l","left" - "r","right" - "t","top","up" - "b","bottom","down".
     * @param {Number} distance How far to move the element in pixels
     * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
     * @return {Ext.Element} this
     */
     move : function(direction, distance, animate){
        var xy = this.getXY();
        direction = direction.toLowerCase();
        switch(direction){
            case "l":
            case "left":
                this.moveTo(xy[0]-distance, xy[1], this.preanim(arguments, 2));
                break;
           case "r":
           case "right":
                this.moveTo(xy[0]+distance, xy[1], this.preanim(arguments, 2));
                break;
           case "t":
           case "top":
           case "up":
                this.moveTo(xy[0], xy[1]-distance, this.preanim(arguments, 2));
                break;
           case "b":
           case "bottom":
           case "down":
                this.moveTo(xy[0], xy[1]+distance, this.preanim(arguments, 2));
                break;
        }
        return this;
    },

    /**
     *  Store the current overflow setting and clip overflow on the element - use {@link #unclip} to remove
     * @return {Ext.Element} this
     */
    clip : function(){
        if(!this.isClipped){
           this.isClipped = true;
           this.originalClip = {
               "o": this.getStyle("overflow"),
               "x": this.getStyle("overflow-x"),
               "y": this.getStyle("overflow-y")
           };
           this.setStyle("overflow", "hidden");
           this.setStyle("overflow-x", "hidden");
           this.setStyle("overflow-y", "hidden");
        }
        return this;
    },

    /**
     *  Return clipping (overflow) to original clipping before clip() was called
     * @return {Ext.Element} this
     */
    unclip : function(){
        if(this.isClipped){
            this.isClipped = false;
            var o = this.originalClip;
            if(o.o){this.setStyle("overflow", o.o);}
            if(o.x){this.setStyle("overflow-x", o.x);}
            if(o.y){this.setStyle("overflow-y", o.y);}
        }
        return this;
    },


    /**
     * Gets the x,y coordinates specified by the anchor position on the element.
     * @param {String} anchor (optional) The specified anchor position (defaults to "c").  See {@link #alignTo}
     * for details on supported anchor positions.
     * @param {Boolean} local (optional) True to get the local (element top/left-relative) anchor position instead
     * of page coordinates
     * @param {Object} size (optional) An object containing the size to use for calculating anchor position
     * {width: (target width), height: (target height)} (defaults to the element's current size)
     * @return {Array} [x, y] An array containing the element's x and y coordinates
     */
    getAnchorXY : function(anchor, local, s){
        //Passing a different size is useful for pre-calculating anchors,
        //especially for anchored animations that change the el size.

        var w, h, vp = false;
        if(!s){
            var d = this.dom;
            if(d == document.body || d == document){
                vp = true;
                w = D.getViewWidth(); h = D.getViewHeight();
            }else{
                w = this.getWidth(); h = this.getHeight();
            }
        }else{
            w = s.width;  h = s.height;
        }
        var x = 0, y = 0, r = Math.round;
        switch((anchor || "tl").toLowerCase()){
            case "c":
                x = r(w*.5);
                y = r(h*.5);
            break;
            case "t":
                x = r(w*.5);
                y = 0;
            break;
            case "l":
                x = 0;
                y = r(h*.5);
            break;
            case "r":
                x = w;
                y = r(h*.5);
            break;
            case "b":
                x = r(w*.5);
                y = h;
            break;
            case "tl":
                x = 0;
                y = 0;
            break;
            case "bl":
                x = 0;
                y = h;
            break;
            case "br":
                x = w;
                y = h;
            break;
            case "tr":
                x = w;
                y = 0;
            break;
        }
        if(local === true){
            return [x, y];
        }
        if(vp){
            var sc = this.getScroll();
            return [x + sc.left, y + sc.top];
        }
        //Add the element's offset xy
        var o = this.getXY();
        return [x+o[0], y+o[1]];
    },

    /**
     * Gets the x,y coordinates to align this element with another element. See {@link #alignTo} for more info on the
     * supported position values.
     * @param {Mixed} element The element to align to.
     * @param {String} position The position to align to.
     * @param {Array} offsets (optional) Offset the positioning by [x, y]
     * @return {Array} [x, y]
     */
    getAlignToXY : function(el, p, o){
        el = Ext.get(el);
        if(!el || !el.dom){
            throw "Element.alignToXY with an element that doesn't exist";
        }
        var d = this.dom;
        var c = false; //constrain to viewport
        var p1 = "", p2 = "";
        o = o || [0,0];

        if(!p){
            p = "tl-bl";
        }else if(p == "?"){
            p = "tl-bl?";
        }else if(p.indexOf("-") == -1){
            p = "tl-" + p;
        }
        p = p.toLowerCase();
        var m = p.match(/^([a-z]+)-([a-z]+)(\?)?$/);
        if(!m){
           throw "Element.alignTo with an invalid alignment " + p;
        }
        p1 = m[1]; p2 = m[2]; c = !!m[3];

        //Subtract the aligned el's internal xy from the target's offset xy
        //plus custom offset to get the aligned el's new offset xy
        var a1 = this.getAnchorXY(p1, true);
        var a2 = el.getAnchorXY(p2, false);

        var x = a2[0] - a1[0] + o[0];
        var y = a2[1] - a1[1] + o[1];

        if(c){
            //constrain the aligned el to viewport if necessary
            var w = this.getWidth(), h = this.getHeight(), r = el.getRegion();
            // 5px of margin for ie
            var dw = D.getViewWidth()-5, dh = D.getViewHeight()-5;

            //If we are at a viewport boundary and the aligned el is anchored on a target border that is
            //perpendicular to the vp border, allow the aligned el to slide on that border,
            //otherwise swap the aligned el to the opposite border of the target.
            var p1y = p1.charAt(0), p1x = p1.charAt(p1.length-1);
           var p2y = p2.charAt(0), p2x = p2.charAt(p2.length-1);
           var swapY = ((p1y=="t" && p2y=="b") || (p1y=="b" && p2y=="t"));
           var swapX = ((p1x=="r" && p2x=="l") || (p1x=="l" && p2x=="r"));

           var doc = document;
           var scrollX = (doc.documentElement.scrollLeft || doc.body.scrollLeft || 0)+5;
           var scrollY = (doc.documentElement.scrollTop || doc.body.scrollTop || 0)+5;

           if((x+w) > dw + scrollX){
                x = swapX ? r.left-w : dw+scrollX-w;
            }
           if(x < scrollX){
               x = swapX ? r.right : scrollX;
           }
           if((y+h) > dh + scrollY){
                y = swapY ? r.top-h : dh+scrollY-h;
            }
           if (y < scrollY){
               y = swapY ? r.bottom : scrollY;
           }
        }
        return [x,y];
    },

    // private
    getConstrainToXY : function(){
        var os = {top:0, left:0, bottom:0, right: 0};

        return function(el, local, offsets, proposedXY){
            el = Ext.get(el);
            offsets = offsets ? Ext.applyIf(offsets, os) : os;

            var vw, vh, vx = 0, vy = 0;
            if(el.dom == document.body || el.dom == document){
                vw = Ext.lib.Dom.getViewWidth();
                vh = Ext.lib.Dom.getViewHeight();
            }else{
                vw = el.dom.clientWidth;
                vh = el.dom.clientHeight;
                if(!local){
                    var vxy = el.getXY();
                    vx = vxy[0];
                    vy = vxy[1];
                }
            }

            var s = el.getScroll();

            vx += offsets.left + s.left;
            vy += offsets.top + s.top;

            vw -= offsets.right;
            vh -= offsets.bottom;

            var vr = vx+vw;
            var vb = vy+vh;

            var xy = proposedXY || (!local ? this.getXY() : [this.getLeft(true), this.getTop(true)]);
            var x = xy[0], y = xy[1];
            var w = this.dom.offsetWidth, h = this.dom.offsetHeight;

            // only move it if it needs it
            var moved = false;

            // first validate right/bottom
            if((x + w) > vr){
                x = vr - w;
                moved = true;
            }
            if((y + h) > vb){
                y = vb - h;
                moved = true;
            }
            // then make sure top/left isn't negative
            if(x < vx){
                x = vx;
                moved = true;
            }
            if(y < vy){
                y = vy;
                moved = true;
            }
            return moved ? [x, y] : false;
        };
    }(),

    // private
    adjustForConstraints : function(xy, parent, offsets){
        return this.getConstrainToXY(parent || document, false, offsets, xy) ||  xy;
    },

    /**
     * Aligns this element with another element relative to the specified anchor points. If the other element is the
     * document it aligns it to the viewport.
     * The position parameter is optional, and can be specified in any one of the following formats:
     * <ul>
     *   <li><b>Blank</b>: Defaults to aligning the element's top-left corner to the target's bottom-left corner ("tl-bl").</li>
     *   <li><b>One anchor (deprecated)</b>: The passed anchor position is used as the target element's anchor point.
     *       The element being aligned will position its top-left corner (tl) to that point.  <i>This method has been
     *       deprecated in favor of the newer two anchor syntax below</i>.</li>
     *   <li><b>Two anchors</b>: If two values from the table below are passed separated by a dash, the first value is used as the
     *       element's anchor point, and the second value is used as the target's anchor point.</li>
     * </ul>
     * In addition to the anchor points, the position parameter also supports the "?" character.  If "?" is passed at the end of
     * the position string, the element will attempt to align as specified, but the position will be adjusted to constrain to
     * the viewport if necessary.  Note that the element being aligned might be swapped to align to a different position than
     * that specified in order to enforce the viewport constraints.
     * Following are all of the supported anchor positions:
<pre>
Value  Description
-----  -----------------------------
tl     The top left corner (default)
t      The center of the top edge
tr     The top right corner
l      The center of the left edge
c      In the center of the element
r      The center of the right edge
bl     The bottom left corner
b      The center of the bottom edge
br     The bottom right corner
</pre>
Example Usage:
<pre><code>
// align el to other-el using the default positioning ("tl-bl", non-constrained)
el.alignTo("other-el");

// align the top left corner of el with the top right corner of other-el (constrained to viewport)
el.alignTo("other-el", "tr?");

// align the bottom right corner of el with the center left edge of other-el
el.alignTo("other-el", "br-l?");

// align the center of el with the bottom left corner of other-el and
// adjust the x position by -6 pixels (and the y position by 0)
el.alignTo("other-el", "c-bl", [-6, 0]);
</code></pre>
     * @param {Mixed} element The element to align to.
     * @param {String} position The position to align to.
     * @param {Array} offsets (optional) Offset the positioning by [x, y]
     * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
     * @return {Ext.Element} this
     */
    alignTo : function(element, position, offsets, animate){
        var xy = this.getAlignToXY(element, position, offsets);
        this.setXY(xy, this.preanim(arguments, 3));
        return this;
    },

    /**
     * Anchors an element to another element and realigns it when the window is resized.
     * @param {Mixed} element The element to align to.
     * @param {String} position The position to align to.
     * @param {Array} offsets (optional) Offset the positioning by [x, y]
     * @param {Boolean/Object} animate (optional) True for the default animation or a standard Element animation config object
     * @param {Boolean/Number} monitorScroll (optional) True to monitor body scroll and reposition. If this parameter
     * is a number, it is used as the buffer delay (defaults to 50ms).
     * @param {Function} callback The function to call after the animation finishes
     * @return {Ext.Element} this
     */
    anchorTo : function(el, alignment, offsets, animate, monitorScroll, callback){
        var action = function(){
            this.alignTo(el, alignment, offsets, animate);
            Ext.callback(callback, this);
        };
        Ext.EventManager.onWindowResize(action, this);
        var tm = typeof monitorScroll;
        if(tm != 'undefined'){
            Ext.EventManager.on(window, 'scroll', action, this,
                {buffer: tm == 'number' ? monitorScroll : 50});
        }
        action.call(this); // align immediately
        return this;
    },
    /**
     * Clears any opacity settings from this element. Required in some cases for IE.
     * @return {Ext.Element} this
     */
    clearOpacity : function(){
        if (window.ActiveXObject) {
            if(typeof this.dom.style.filter == 'string' && (/alpha/i).test(this.dom.style.filter)){
                this.dom.style.filter = "";
            }
        } else {
            this.dom.style.opacity = "";
            this.dom.style["-moz-opacity"] = "";
            this.dom.style["-khtml-opacity"] = "";
        }
        return this;
    },

    /**
     * Hide this element - Uses display mode to determine whether to use "display" or "visibility". See {@link #setVisible}.
     * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
     * @return {Ext.Element} this
     */
    hide : function(animate){
        this.setVisible(false, this.preanim(arguments, 0));
        return this;
    },

    /**
    * Show this element - Uses display mode to determine whether to use "display" or "visibility". See {@link #setVisible}.
    * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
     * @return {Ext.Element} this
     */
    show : function(animate){
        this.setVisible(true, this.preanim(arguments, 0));
        return this;
    },

    /**
     * @private Test if size has a unit, otherwise appends the default
     */
    addUnits : function(size){
        return Ext.Element.addUnits(size, this.defaultUnit);
    },

    /**
    * Update the innerHTML of this element, optionally searching for and processing scripts
    * @param {String} html The new HTML
    * @param {Boolean} loadScripts (optional) True to look for and process scripts (defaults to false)
    * @param {Function} callback (optional) For async script loading you can be notified when the update completes
    * @return {Ext.Element} this
     */
    update : function(html, loadScripts, callback){
        if(typeof html == "undefined"){
            html = "";
        }
        if(loadScripts !== true){
            this.dom.innerHTML = html;
            if(typeof callback == "function"){
                callback();
            }
            return this;
        }
        var id = Ext.id();
        var dom = this.dom;

        html += '<span id="' + id + '"></span>';

        E.onAvailable(id, function(){
            var hd = document.getElementsByTagName("head")[0];
            var re = /(?:<script([^>]*)?>)((\n|\r|.)*?)(?:<\/script>)/ig;
            var srcRe = /\ssrc=([\'\"])(.*?)\1/i;
            var typeRe = /\stype=([\'\"])(.*?)\1/i;

            var match;
            while(match = re.exec(html)){
                var attrs = match[1];
                var srcMatch = attrs ? attrs.match(srcRe) : false;
                if(srcMatch && srcMatch[2]){
                   var s = document.createElement("script");
                   s.src = srcMatch[2];
                   var typeMatch = attrs.match(typeRe);
                   if(typeMatch && typeMatch[2]){
                       s.type = typeMatch[2];
                   }
                   hd.appendChild(s);
                }else if(match[2] && match[2].length > 0){
                    if(window.execScript) {
                       window.execScript(match[2]);
                    } else {
                       window.eval(match[2]);
                    }
                }
            }
            var el = document.getElementById(id);
            if(el){Ext.removeNode(el);}
            if(typeof callback == "function"){
                callback();
            }
        });
        dom.innerHTML = html.replace(/(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)/ig, "");
        return this;
    },

    /**
     * Direct access to the Updater {@link Ext.Updater#update} method (takes the same parameters).
     * @param {String/Function} url The url for this request or a function to call to get the url
     * @param {String/Object} params (optional) The parameters to pass as either a url encoded string "param1=1&amp;param2=2" or an object {param1: 1, param2: 2}
     * @param {Function} callback (optional) Callback when transaction is complete - called with signature (oElement, bSuccess)
     * @param {Boolean} discardUrl (optional) By default when you execute an update the defaultUrl is changed to the last used url. If true, it will not store the url.
     * @return {Ext.Element} this
     */
    load : function(){
        var um = this.getUpdater();
        um.update.apply(um, arguments);
        return this;
    },

    /**
    * Gets this element's Updater
    * @return {Ext.Updater} The Updater
    */
    getUpdater : function(){
        if(!this.updateManager){
            this.updateManager = new Ext.Updater(this);
        }
        return this.updateManager;
    },

    /**
     * Disables text selection for this element (normalized across browsers)
     * @return {Ext.Element} this
     */
    unselectable : function(){
        this.dom.unselectable = "on";
        this.swallowEvent("selectstart", true);
        this.applyStyles("-moz-user-select:none;-khtml-user-select:none;");
        this.addClass("x-unselectable");
        return this;
    },

    /**
    * Calculates the x, y to center this element on the screen
    * @return {Array} The x, y values [x, y]
    */
    getCenterXY : function(){
        return this.getAlignToXY(document, 'c-c');
    },

    /**
    * Centers the Element in either the viewport, or another Element.
    * @param {Mixed} centerIn (optional) The element in which to center the element.
    */
    center : function(centerIn){
        this.alignTo(centerIn || document, 'c-c');
        return this;
    },

    /**
     * Tests various css rules/browsers to determine if this element uses a border box
     * @return {Boolean}
     */
    isBorderBox : function(){
        return noBoxAdjust[this.dom.tagName.toLowerCase()] || Ext.isBorderBox;
    },

    /**
     * Return a box {x, y, width, height} that can be used to set another elements
     * size/location to match this element.
     * @param {Boolean} contentBox (optional) If true a box for the content of the element is returned.
     * @param {Boolean} local (optional) If true the element's left and top are returned instead of page x/y.
     * @return {Object} box An object in the format {x, y, width, height}
     */
    getBox : function(contentBox, local){
        var xy;
        if(!local){
            xy = this.getXY();
        }else{
            var left = parseInt(this.getStyle("left"), 10) || 0;
            var top = parseInt(this.getStyle("top"), 10) || 0;
            xy = [left, top];
        }
        var el = this.dom, w = el.offsetWidth, h = el.offsetHeight, bx;
        if(!contentBox){
            bx = {x: xy[0], y: xy[1], 0: xy[0], 1: xy[1], width: w, height: h};
        }else{
            var l = this.getBorderWidth("l")+this.getPadding("l");
            var r = this.getBorderWidth("r")+this.getPadding("r");
            var t = this.getBorderWidth("t")+this.getPadding("t");
            var b = this.getBorderWidth("b")+this.getPadding("b");
            bx = {x: xy[0]+l, y: xy[1]+t, 0: xy[0]+l, 1: xy[1]+t, width: w-(l+r), height: h-(t+b)};
        }
        bx.right = bx.x + bx.width;
        bx.bottom = bx.y + bx.height;
        return bx;
    },

    /**
     * Returns the sum width of the padding and borders for the passed "sides". See getBorderWidth()
     for more information about the sides.
     * @param {String} sides
     * @return {Number}
     */
    getFrameWidth : function(sides, onlyContentBox){
        return onlyContentBox && Ext.isBorderBox ? 0 : (this.getPadding(sides) + this.getBorderWidth(sides));
    },

    /**
     * Sets the element's box. Use getBox() on another element to get a box obj. If animate is true then width, height, x and y will be animated concurrently.
     * @param {Object} box The box to fill {x, y, width, height}
     * @param {Boolean} adjust (optional) Whether to adjust for box-model issues automatically
     * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
     * @return {Ext.Element} this
     */
    setBox : function(box, adjust, animate){
        var w = box.width, h = box.height;
        if((adjust && !this.autoBoxAdjust) && !this.isBorderBox()){
           w -= (this.getBorderWidth("lr") + this.getPadding("lr"));
           h -= (this.getBorderWidth("tb") + this.getPadding("tb"));
        }
        this.setBounds(box.x, box.y, w, h, this.preanim(arguments, 2));
        return this;
    },

    /**
     * Forces the browser to repaint this element
     * @return {Ext.Element} this
     */
     repaint : function(){
        var dom = this.dom;
        this.addClass("x-repaint");
        setTimeout(function(){
            Ext.get(dom).removeClass("x-repaint");
        }, 1);
        return this;
    },

    /**
     * Returns an object with properties top, left, right and bottom representing the margins of this element unless sides is passed,
     * then it returns the calculated width of the sides (see getPadding)
     * @param {String} sides (optional) Any combination of l, r, t, b to get the sum of those sides
     * @return {Object/Number}
     */
    getMargins : function(side){
        if(!side){
            return {
                top: parseInt(this.getStyle("margin-top"), 10) || 0,
                left: parseInt(this.getStyle("margin-left"), 10) || 0,
                bottom: parseInt(this.getStyle("margin-bottom"), 10) || 0,
                right: parseInt(this.getStyle("margin-right"), 10) || 0
            };
        }else{
            return this.addStyles(side, El.margins);
         }
    },

    // private
    addStyles : function(sides, styles){
        var val = 0, v, w;
        for(var i = 0, len = sides.length; i < len; i++){
            v = this.getStyle(styles[sides.charAt(i)]);
            if(v){
                 w = parseInt(v, 10);
                 if(w){ val += (w >= 0 ? w : -1 * w); }
            }
        }
        return val;
    },

    /**
     * Creates a proxy element of this element
     * @param {String/Object} config The class name of the proxy element or a DomHelper config object
     * @param {String/HTMLElement} renderTo (optional) The element or element id to render the proxy to (defaults to document.body)
     * @param {Boolean} matchBox (optional) True to align and size the proxy to this element now (defaults to false)
     * @return {Ext.Element} The new proxy element
     */
    createProxy : function(config, renderTo, matchBox){
        config = typeof config == "object" ?
            config : {tag : "div", cls: config};

        var proxy;
        if(renderTo){
            proxy = Ext.DomHelper.append(renderTo, config, true);
        }else {
            proxy = Ext.DomHelper.insertBefore(this.dom, config, true);
        }
        if(matchBox){
           proxy.setBox(this.getBox());
        }
        return proxy;
    },

    /**
     * Puts a mask over this element to disable user interaction. Requires core.css.
     * This method can only be applied to elements which accept child nodes.
     * @param {String} msg (optional) A message to display in the mask
     * @param {String} msgCls (optional) A css class to apply to the msg element
     * @return {Element} The mask element
     */
    mask : function(msg, msgCls){
        if(this.getStyle("position") == "static"){
            this.setStyle("position", "relative");
        }
        if(this._maskMsg){
            this._maskMsg.remove();
        }
        if(this._mask){
            this._mask.remove();
        }

        this._mask = Ext.DomHelper.append(this.dom, {cls:"ext-el-mask"}, true);

        this.addClass("x-masked");
        this._mask.setDisplayed(true);
        if(typeof msg == 'string'){
            this._maskMsg = Ext.DomHelper.append(this.dom, {cls:"ext-el-mask-msg", cn:{tag:'div'}}, true);
            var mm = this._maskMsg;
            mm.dom.className = msgCls ? "ext-el-mask-msg " + msgCls : "ext-el-mask-msg";
            mm.dom.firstChild.innerHTML = msg;
            mm.setDisplayed(true);
            mm.center(this);
        }
        if(Ext.isIE && !(Ext.isIE7 && Ext.isStrict) && this.getStyle('height') == 'auto'){ // ie will not expand full height automatically
            this._mask.setSize(this.dom.clientWidth, this.getHeight());
        }
        return this._mask;
    },

    /**
     * Removes a previously applied mask.
     */
    unmask : function(){
        if(this._mask){
            if(this._maskMsg){
                this._maskMsg.remove();
                delete this._maskMsg;
            }
            this._mask.remove();
            delete this._mask;
        }
        this.removeClass("x-masked");
    },

    /**
     * Returns true if this element is masked
     * @return {Boolean}
     */
    isMasked : function(){
        return this._mask && this._mask.isVisible();
    },

    /**
     * Creates an iframe shim for this element to keep selects and other windowed objects from
     * showing through.
     * @return {Ext.Element} The new shim element
     */
    createShim : function(){
        var el = document.createElement('iframe');
        el.frameBorder = 'no';
        el.className = 'ext-shim';
        if(Ext.isIE && Ext.isSecure){
            el.src = Ext.SSL_SECURE_URL;
        }
        var shim = Ext.get(this.dom.parentNode.insertBefore(el, this.dom));
        shim.autoBoxAdjust = false;
        return shim;
    },

    /**
     * Removes this element from the DOM and deletes it from the cache
     */
    remove : function(){
        Ext.removeNode(this.dom);
        delete El.cache[this.dom.id];
    },

    /**
     * Sets up event handlers to call the passed functions when the mouse is over this element. Automatically
     * filters child element mouse events.
     * @param {Function} overFn
     * @param {Function} outFn
     * @param {Object} scope (optional)
     * @return {Ext.Element} this
     */
    hover : function(overFn, outFn, scope){
        var preOverFn = function(e){
            if(!e.within(this, true)){
                overFn.apply(scope || this, arguments);
            }
        };
        var preOutFn = function(e){
            if(!e.within(this, true)){
                outFn.apply(scope || this, arguments);
            }
        };
        this.on("mouseover", preOverFn, this.dom);
        this.on("mouseout", preOutFn, this.dom);
        return this;
    },

    /**
     * Sets up event handlers to add and remove a css class when the mouse is over this element
     * @param {String} className
     * @param {Boolean} preventFlicker (optional) If set to true, it prevents flickering by filtering
     * mouseout events for children elements
     * @return {Ext.Element} this
     */
    addClassOnOver : function(className, preventFlicker){
        this.hover(
            function(){
                Ext.fly(this, '_internal').addClass(className);
            },
            function(){
                Ext.fly(this, '_internal').removeClass(className);
            }
        );
        return this;
    },

    /**
     * Sets up event handlers to add and remove a css class when this element has the focus
     * @param {String} className
     * @return {Ext.Element} this
     */
    addClassOnFocus : function(className){
        this.on("focus", function(){
            Ext.fly(this, '_internal').addClass(className);
        }, this.dom);
        this.on("blur", function(){
            Ext.fly(this, '_internal').removeClass(className);
        }, this.dom);
        return this;
    },
    /**
     * Sets up event handlers to add and remove a css class when the mouse is down and then up on this element (a click effect)
     * @param {String} className
     * @return {Ext.Element} this
     */
    addClassOnClick : function(className){
        var dom = this.dom;
        this.on("mousedown", function(){
            Ext.fly(dom, '_internal').addClass(className);
            var d = Ext.getDoc();
            var fn = function(){
                Ext.fly(dom, '_internal').removeClass(className);
                d.removeListener("mouseup", fn);
            };
            d.on("mouseup", fn);
        });
        return this;
    },

    /**
     * Stops the specified event from bubbling and optionally prevents the default action
     * @param {String} eventName
     * @param {Boolean} preventDefault (optional) true to prevent the default action too
     * @return {Ext.Element} this
     */
    swallowEvent : function(eventName, preventDefault){
        var fn = function(e){
            e.stopPropagation();
            if(preventDefault){
                e.preventDefault();
            }
        };
        if(eventName instanceof Array){
            for(var i = 0, len = eventName.length; i < len; i++){
                 this.on(eventName[i], fn);
            }
            return this;
        }
        this.on(eventName, fn);
        return this;
    },

    /**
     * Gets the parent node for this element, optionally chaining up trying to match a selector
     * @param {String} selector (optional) Find a parent node that matches the passed simple selector
     * @param {Boolean} returnDom (optional) True to return a raw dom node instead of an Ext.Element
     * @return {Ext.Element/HTMLElement} The parent node or null
	 */
    parent : function(selector, returnDom){
        return this.matchNode('parentNode', 'parentNode', selector, returnDom);
    },

     /**
     * Gets the next sibling, skipping text nodes
     * @param {String} selector (optional) Find the next sibling that matches the passed simple selector
     * @param {Boolean} returnDom (optional) True to return a raw dom node instead of an Ext.Element
     * @return {Ext.Element/HTMLElement} The next sibling or null
	 */
    next : function(selector, returnDom){
        return this.matchNode('nextSibling', 'nextSibling', selector, returnDom);
    },

    /**
     * Gets the previous sibling, skipping text nodes
     * @param {String} selector (optional) Find the previous sibling that matches the passed simple selector
     * @param {Boolean} returnDom (optional) True to return a raw dom node instead of an Ext.Element
     * @return {Ext.Element/HTMLElement} The previous sibling or null
	 */
    prev : function(selector, returnDom){
        return this.matchNode('previousSibling', 'previousSibling', selector, returnDom);
    },


    /**
     * Gets the first child, skipping text nodes
     * @param {String} selector (optional) Find the next sibling that matches the passed simple selector
     * @param {Boolean} returnDom (optional) True to return a raw dom node instead of an Ext.Element
     * @return {Ext.Element/HTMLElement} The first child or null
	 */
    first : function(selector, returnDom){
        return this.matchNode('nextSibling', 'firstChild', selector, returnDom);
    },

    /**
     * Gets the last child, skipping text nodes
     * @param {String} selector (optional) Find the previous sibling that matches the passed simple selector
     * @param {Boolean} returnDom (optional) True to return a raw dom node instead of an Ext.Element
     * @return {Ext.Element/HTMLElement} The last child or null
	 */
    last : function(selector, returnDom){
        return this.matchNode('previousSibling', 'lastChild', selector, returnDom);
    },

    matchNode : function(dir, start, selector, returnDom){
        var n = this.dom[start];
        while(n){
            if(n.nodeType == 1 && (!selector || Ext.DomQuery.is(n, selector))){
                return !returnDom ? Ext.get(n) : n;
            }
            n = n[dir];
        }
        return null;
    },

    /**
     * Appends the passed element(s) to this element
     * @param {String/HTMLElement/Array/Element/CompositeElement} el
     * @return {Ext.Element} this
     */
    appendChild: function(el){
        el = Ext.get(el);
        el.appendTo(this);
        return this;
    },

    /**
     * Creates the passed DomHelper config and appends it to this element or optionally inserts it before the passed child element.
     * @param {Object} config DomHelper element config object.  If no tag is specified (e.g., {tag:'input'}) then a div will be
     * automatically generated with the specified attributes.
     * @param {HTMLElement} insertBefore (optional) a child element of this element
     * @param {Boolean} returnDom (optional) true to return the dom node instead of creating an Element
     * @return {Ext.Element} The new child element
     */
    createChild: function(config, insertBefore, returnDom){
        config = config || {tag:'div'};
        if(insertBefore){
            return Ext.DomHelper.insertBefore(insertBefore, config, returnDom !== true);
        }
        return Ext.DomHelper[!this.dom.firstChild ? 'overwrite' : 'append'](this.dom, config,  returnDom !== true);
    },

    /**
     * Appends this element to the passed element
     * @param {Mixed} el The new parent element
     * @return {Ext.Element} this
     */
    appendTo: function(el){
        el = Ext.getDom(el);
        el.appendChild(this.dom);
        return this;
    },

    /**
     * Inserts this element before the passed element in the DOM
     * @param {Mixed} el The element to insert before
     * @return {Ext.Element} this
     */
    insertBefore: function(el){
        el = Ext.getDom(el);
        el.parentNode.insertBefore(this.dom, el);
        return this;
    },

    /**
     * Inserts this element after the passed element in the DOM
     * @param {Mixed} el The element to insert after
     * @return {Ext.Element} this
     */
    insertAfter: function(el){
        el = Ext.getDom(el);
        el.parentNode.insertBefore(this.dom, el.nextSibling);
        return this;
    },

    /**
     * Inserts (or creates) an element (or DomHelper config) as the first child of the this element
     * @param {Mixed/Object} el The id or element to insert or a DomHelper config to create and insert
     * @return {Ext.Element} The new child
     */
    insertFirst: function(el, returnDom){
        el = el || {};
        if(typeof el == 'object' && !el.nodeType){ // dh config
            return this.createChild(el, this.dom.firstChild, returnDom);
        }else{
            el = Ext.getDom(el);
            this.dom.insertBefore(el, this.dom.firstChild);
            return !returnDom ? Ext.get(el) : el;
        }
    },

    /**
     * Inserts (or creates) the passed element (or DomHelper config) as a sibling of this element
     * @param {Mixed/Object/Array} el The id, element to insert or a DomHelper config to create and insert *or* an array of any of those.
     * @param {String} where (optional) 'before' or 'after' defaults to before
     * @param {Boolean} returnDom (optional) True to return the raw DOM element instead of Ext.Element
     * @return {Ext.Element} the inserted Element
     */
    insertSibling: function(el, where, returnDom){
        var rt;
        if(el instanceof Array){
            for(var i = 0, len = el.length; i < len; i++){
                rt = this.insertSibling(el[i], where, returnDom);
            }
            return rt;
        }
        where = where ? where.toLowerCase() : 'before';
        el = el || {};
        var refNode = where == 'before' ? this.dom : this.dom.nextSibling;

        if(typeof el == 'object' && !el.nodeType){ // dh config
            if(where == 'after' && !this.dom.nextSibling){
                rt = Ext.DomHelper.append(this.dom.parentNode, el, !returnDom);
            }else{
                rt = Ext.DomHelper[where == 'after' ? 'insertAfter' : 'insertBefore'](this.dom, el, !returnDom);
            }

        }else{
            rt = this.dom.parentNode.insertBefore(Ext.getDom(el), refNode);
            if(!returnDom){
                rt = Ext.get(rt);
            }
        }
        return rt;
    },

    /**
     * Creates and wraps this element with another element
     * @param {Object} config (optional) DomHelper element config object for the wrapper element or null for an empty div
     * @param {Boolean} returnDom (optional) True to return the raw DOM element instead of Ext.Element
     * @return {HTMLElement/Element} The newly created wrapper element
     */
    wrap: function(config, returnDom){
        if(!config){
            config = {tag: "div"};
        }
        var newEl = Ext.DomHelper.insertBefore(this.dom, config, !returnDom);
        newEl.dom ? newEl.dom.appendChild(this.dom) : newEl.appendChild(this.dom);
        return newEl;
    },

    /**
     * Replaces the passed element with this element
     * @param {Mixed} el The element to replace
     * @return {Ext.Element} this
     */
    replace: function(el){
        el = Ext.get(el);
        this.insertBefore(el);
        el.remove();
        return this;
    },

    /**
     * Replaces this element with the passed element
     * @param {Mixed/Object} el The new element or a DomHelper config of an element to create
     * @return {Ext.Element} this
     */
    replaceWith: function(el){
        if(typeof el == 'object' && !el.nodeType){ // dh config
            el = this.insertSibling(el, 'before');
        }else{
            el = Ext.getDom(el);
            this.dom.parentNode.insertBefore(el, this.dom);
        }
        El.uncache(this.id);
        this.dom.parentNode.removeChild(this.dom);
        this.dom = el;
        this.id = Ext.id(el);
        El.cache[this.id] = this;
        return this;
    },

    /**
     * Inserts an html fragment into this element
     * @param {String} where Where to insert the html in relation to the this element - beforeBegin, afterBegin, beforeEnd, afterEnd.
     * @param {String} html The HTML fragment
     * @param {Boolean} returnEl True to return an Ext.Element
     * @return {HTMLElement/Ext.Element} The inserted node (or nearest related if more than 1 inserted)
     */
    insertHtml : function(where, html, returnEl){
        var el = Ext.DomHelper.insertHtml(where, this.dom, html);
        return returnEl ? Ext.get(el) : el;
    },

    /**
     * Sets the passed attributes as attributes of this element (a style attribute can be a string, object or function)
     * @param {Object} o The object with the attributes
     * @param {Boolean} useSet (optional) false to override the default setAttribute to use expandos.
     * @return {Ext.Element} this
     */
    set : function(o, useSet){
        var el = this.dom;
        useSet = typeof useSet == 'undefined' ? (el.setAttribute ? true : false) : useSet;
        for(var attr in o){
            if(attr == "style" || typeof o[attr] == "function") continue;
            if(attr=="cls"){
                el.className = o["cls"];
            }else if(o.hasOwnProperty(attr)){
                if(useSet) el.setAttribute(attr, o[attr]);
                else el[attr] = o[attr];
            }
        }
        if(o.style){
            Ext.DomHelper.applyStyles(el, o.style);
        }
        return this;
    },

    /**
     * Convenience method for constructing a KeyMap
     * @param {Number/Array/Object/String} key Either a string with the keys to listen for, the numeric key code, array of key codes or an object with the following options:
     *                                  {key: (number or array), shift: (true/false), ctrl: (true/false), alt: (true/false)}
     * @param {Function} fn The function to call
     * @param {Object} scope (optional) The scope of the function
     * @return {Ext.KeyMap} The KeyMap created
     */
    addKeyListener : function(key, fn, scope){
        var config;
        if(typeof key != "object" || key instanceof Array){
            config = {
                key: key,
                fn: fn,
                scope: scope
            };
        }else{
            config = {
                key : key.key,
                shift : key.shift,
                ctrl : key.ctrl,
                alt : key.alt,
                fn: fn,
                scope: scope
            };
        }
        return new Ext.KeyMap(this, config);
    },

    /**
     * Creates a KeyMap for this element
     * @param {Object} config The KeyMap config. See {@link Ext.KeyMap} for more details
     * @return {Ext.KeyMap} The KeyMap created
     */
    addKeyMap : function(config){
        return new Ext.KeyMap(this, config);
    },

    /**
     * Returns true if this element is scrollable.
     * @return {Boolean}
     */
     isScrollable : function(){
        var dom = this.dom;
        return dom.scrollHeight > dom.clientHeight || dom.scrollWidth > dom.clientWidth;
    },

    /**
     * Scrolls this element the specified scroll point. It does NOT do bounds checking so if you scroll to a weird value it will try to do it. For auto bounds checking, use scroll().
     * @param {String} side Either "left" for scrollLeft values or "top" for scrollTop values.
     * @param {Number} value The new scroll value
     * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
     * @return {Element} this
     */
    scrollTo : function(side, value, animate){
        var prop = side.toLowerCase() == "left" ? "scrollLeft" : "scrollTop";
        if(!animate || !A){
            this.dom[prop] = value;
        }else{
            var to = prop == "scrollLeft" ? [value, this.dom.scrollTop] : [this.dom.scrollLeft, value];
            this.anim({scroll: {"to": to}}, this.preanim(arguments, 2), 'scroll');
        }
        return this;
    },

    /**
     * Scrolls this element the specified direction. Does bounds checking to make sure the scroll is
     * within this element's scrollable range.
     * @param {String} direction Possible values are: "l","left" - "r","right" - "t","top","up" - "b","bottom","down".
     * @param {Number} distance How far to scroll the element in pixels
     * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
     * @return {Boolean} Returns true if a scroll was triggered or false if the element
     * was scrolled as far as it could go.
     */
     scroll : function(direction, distance, animate){
         if(!this.isScrollable()){
             return;
         }
         var el = this.dom;
         var l = el.scrollLeft, t = el.scrollTop;
         var w = el.scrollWidth, h = el.scrollHeight;
         var cw = el.clientWidth, ch = el.clientHeight;
         direction = direction.toLowerCase();
         var scrolled = false;
         var a = this.preanim(arguments, 2);
         switch(direction){
             case "l":
             case "left":
                 if(w - l > cw){
                     var v = Math.min(l + distance, w-cw);
                     this.scrollTo("left", v, a);
                     scrolled = true;
                 }
                 break;
            case "r":
            case "right":
                 if(l > 0){
                     var v = Math.max(l - distance, 0);
                     this.scrollTo("left", v, a);
                     scrolled = true;
                 }
                 break;
            case "t":
            case "top":
            case "up":
                 if(t > 0){
                     var v = Math.max(t - distance, 0);
                     this.scrollTo("top", v, a);
                     scrolled = true;
                 }
                 break;
            case "b":
            case "bottom":
            case "down":
                 if(h - t > ch){
                     var v = Math.min(t + distance, h-ch);
                     this.scrollTo("top", v, a);
                     scrolled = true;
                 }
                 break;
         }
         return scrolled;
    },

    /**
     * Translates the passed page coordinates into left/top css values for this element
     * @param {Number/Array} x The page x or an array containing [x, y]
     * @param {Number} y The page y
     * @return {Object} An object with left and top properties. e.g. {left: (value), top: (value)}
     */
    translatePoints : function(x, y){
        if(typeof x == 'object' || x instanceof Array){
            y = x[1]; x = x[0];
        }
        var p = this.getStyle('position');
        var o = this.getXY();

        var l = parseInt(this.getStyle('left'), 10);
        var t = parseInt(this.getStyle('top'), 10);

        if(isNaN(l)){
            l = (p == "relative") ? 0 : this.dom.offsetLeft;
        }
        if(isNaN(t)){
            t = (p == "relative") ? 0 : this.dom.offsetTop;
        }

        return {left: (x - o[0] + l), top: (y - o[1] + t)};
    },

    /**
     * Returns the current scroll position of the element.
     * @return {Object} An object containing the scroll position in the format {left: (scrollLeft), top: (scrollTop)}
     */
    getScroll : function(){
        var d = this.dom, doc = document;
        if(d == doc || d == doc.body){
            var l, t;
            if(Ext.isIE && Ext.isStrict){
                l = doc.documentElement.scrollLeft || (doc.body.scrollLeft || 0);
                t = doc.documentElement.scrollTop || (doc.body.scrollTop || 0);
            }else{
                l = window.pageXOffset || (doc.body.scrollLeft || 0);
                t = window.pageYOffset || (doc.body.scrollTop || 0);
            }
            return {left: l, top: t};
        }else{
            return {left: d.scrollLeft, top: d.scrollTop};
        }
    },

    /**
     * Return the CSS color for the specified CSS attribute. rgb, 3 digit (like #fff) and valid values
     * are convert to standard 6 digit hex color.
     * @param {String} attr The css attribute
     * @param {String} defaultValue The default value to use when a valid color isn't found
     * @param {String} prefix (optional) defaults to #. Use an empty string when working with
     * color anims.
     */
    getColor : function(attr, defaultValue, prefix){
        var v = this.getStyle(attr);
        if(!v || v == "transparent" || v == "inherit") {
            return defaultValue;
        }
        var color = typeof prefix == "undefined" ? "#" : prefix;
        if(v.substr(0, 4) == "rgb("){
            var rvs = v.slice(4, v.length -1).split(",");
            for(var i = 0; i < 3; i++){
                var h = parseInt(rvs[i]);
                var s = h.toString(16);
                if(h < 16){
                    s = "0" + s;
                }
                color += s;
            }
        } else {
            if(v.substr(0, 1) == "#"){
                if(v.length == 4) {
                    for(var i = 1; i < 4; i++){
                        var c = v.charAt(i);
                        color +=  c + c;
                    }
                }else if(v.length == 7){
                    color += v.substr(1);
                }
            }
        }
        return(color.length > 5 ? color.toLowerCase() : defaultValue);
    },

    /**
     * Wraps the specified element with a special markup/CSS block that renders by default as a gray container with a
     * gradient background, rounded corners and a 4-way shadow.  Example usage:
     * <pre><code>
// Basic box wrap
Ext.get("foo").boxWrap();

// You can also add a custom class and use CSS inheritance rules to customize the box look.
// 'x-box-blue' is a built-in alternative -- look at the related CSS definitions as an example
// for how to create a custom box wrap style.
Ext.get("foo").boxWrap().addClass("x-box-blue");
</pre></code>
     * @param {String} class (optional) A base CSS class to apply to the containing wrapper element (defaults to 'x-box').
     * Note that there are a number of CSS rules that are dependent on this name to make the overall effect work,
     * so if you supply an alternate base class, make sure you also supply all of the necessary rules.
     * @return {Ext.Element} this
     */
    boxWrap : function(cls){
        cls = cls || 'x-box';
        var el = Ext.get(this.insertHtml('beforeBegin', String.format('<div class="{0}">'+El.boxMarkup+'</div>', cls)));
        el.child('.'+cls+'-mc').dom.appendChild(this.dom);
        return el;
    },

    /**
     * Returns the value of a namespaced attribute from the element's underlying DOM node.
     * @param {String} namespace The namespace in which to look for the attribute
     * @param {String} name The attribute name
     * @return {String} The attribute value
     */
    getAttributeNS : Ext.isIE ? function(ns, name){
        var d = this.dom;
        var type = typeof d[ns+":"+name];
        if(type != 'undefined' && type != 'unknown'){
            return d[ns+":"+name];
        }
        return d[name];
    } : function(ns, name){
        var d = this.dom;
        return d.getAttributeNS(ns, name) || d.getAttribute(ns+":"+name) || d.getAttribute(name) || d[name];
    },

    getTextWidth : function(text, min, max){
        return (Ext.util.TextMetrics.measure(this.dom, Ext.value(text, this.dom.innerHTML, true)).width).constrain(min || 0, max || 1000000);
    }
};

var ep = El.prototype;

/**
 * Appends an event handler (shorthand for {@link #addListener}).
 * @param {String} eventName The type of event to handle
 * @param {Function} fn The handler function the event invokes
 * @param {Object} scope (optional) The scope (this element) of the handler function
 * @param {Object} options (optional) An object containing standard {@link #addListener} options
 * @member Ext.Element
 * @method on
 */
ep.on = ep.addListener;
    // backwards compat
ep.mon = ep.addListener;

ep.getUpdateManager = ep.getUpdater;

/**
 * Removes an event handler from this element (shorthand for {@link #removeListener}).
 * @param {String} eventName the type of event to remove
 * @param {Function} fn the method the event invokes
 * @return {Ext.Element} this
 * @member Ext.Element
 * @method un
 */
ep.un = ep.removeListener;

/**
 * true to automatically adjust width and height settings for box-model issues (default to true)
 */
ep.autoBoxAdjust = true;

// private
El.unitPattern = /\d+(px|em|%|en|ex|pt|in|cm|mm|pc)$/i;

// private
El.addUnits = function(v, defaultUnit){
    if(v === "" || v == "auto"){
        return v;
    }
    if(v === undefined){
        return '';
    }
    if(typeof v == "number" || !El.unitPattern.test(v)){
        return v + (defaultUnit || 'px');
    }
    return v;
};

// special markup used throughout Ext when box wrapping elements
El.boxMarkup = '<div class="{0}-tl"><div class="{0}-tr"><div class="{0}-tc"></div></div></div><div class="{0}-ml"><div class="{0}-mr"><div class="{0}-mc"></div></div></div><div class="{0}-bl"><div class="{0}-br"><div class="{0}-bc"></div></div></div>';
/**
 * Visibility mode constant - Use visibility to hide element
 * @static
 * @type Number
 */
El.VISIBILITY = 1;
/**
 * Visibility mode constant - Use display to hide element
 * @static
 * @type Number
 */
El.DISPLAY = 2;

El.borders = {l: "border-left-width", r: "border-right-width", t: "border-top-width", b: "border-bottom-width"};
El.paddings = {l: "padding-left", r: "padding-right", t: "padding-top", b: "padding-bottom"};
El.margins = {l: "margin-left", r: "margin-right", t: "margin-top", b: "margin-bottom"};



/**
 * @private
 */
El.cache = {};

var docEl;

/**
 * Static method to retrieve Element objects. Uses simple caching to consistently return the same object.
 * Automatically fixes if an object was recreated with the same id via AJAX or DOM.
 * @param {Mixed} el The id of the node, a DOM Node or an existing Element.
 * @return {Element} The Element object (or null if no matching element was found)
 * @static
 */
El.get = function(el){
    var ex, elm, id;
    if(!el){ return null; }
    if(typeof el == "string"){ // element id
        if(!(elm = document.getElementById(el))){
            return null;
        }
        if(ex = El.cache[el]){
            ex.dom = elm;
        }else{
            ex = El.cache[el] = new El(elm);
        }
        return ex;
    }else if(el.tagName){ // dom element
        if(!(id = el.id)){
            id = Ext.id(el);
        }
        if(ex = El.cache[id]){
            ex.dom = el;
        }else{
            ex = El.cache[id] = new El(el);
        }
        return ex;
    }else if(el instanceof El){
        if(el != docEl){
            el.dom = document.getElementById(el.id) || el.dom; // refresh dom element in case no longer valid,
                                                          // catch case where it hasn't been appended
            El.cache[el.id] = el; // in case it was created directly with Element(), let's cache it
        }
        return el;
    }else if(el.isComposite){
        return el;
    }else if(el instanceof Array){
        return El.select(el);
    }else if(el == document){
        // create a bogus element object representing the document object
        if(!docEl){
            var f = function(){};
            f.prototype = El.prototype;
            docEl = new f();
            docEl.dom = document;
        }
        return docEl;
    }
    return null;
};

// private
El.uncache = function(el){
    for(var i = 0, a = arguments, len = a.length; i < len; i++) {
        if(a[i]){
            delete El.cache[a[i].id || a[i]];
        }
    }
};

// private
// Garbage collection - uncache elements/purge listeners on orphaned elements
// so we don't hold a reference and cause the browser to retain them
El.garbageCollect = function(){
    if(!Ext.enableGarbageCollector){
        clearInterval(El.collectorThread);
        return;
    }
    for(var eid in El.cache){
        var el = El.cache[eid], d = el.dom;
        // -------------------------------------------------------
        // Determining what is garbage:
        // -------------------------------------------------------
        // !d
        // dom node is null, definitely garbage
        // -------------------------------------------------------
        // !d.parentNode
        // no parentNode == direct orphan, definitely garbage
        // -------------------------------------------------------
        // !d.offsetParent && !document.getElementById(eid)
        // display none elements have no offsetParent so we will
        // also try to look it up by it's id. However, check
        // offsetParent first so we don't do unneeded lookups.
        // This enables collection of elements that are not orphans
        // directly, but somewhere up the line they have an orphan
        // parent.
        // -------------------------------------------------------
        if(!d || !d.parentNode || (!d.offsetParent && !document.getElementById(eid))){
            delete El.cache[eid];
            if(d && Ext.enableListenerCollection){
                E.purgeElement(d);
            }
        }
    }
}
El.collectorThreadId = setInterval(El.garbageCollect, 30000);

var flyFn = function(){};
flyFn.prototype = El.prototype;
var _cls = new flyFn();

// dom is optional
El.Flyweight = function(dom){
    this.dom = dom;
};

El.Flyweight.prototype = _cls;
El.Flyweight.prototype.isFlyweight = true;

El._flyweights = {};
/**
 * Gets the globally shared flyweight Element, with the passed node as the active element. Do not store a reference to this element -
 * the dom node can be overwritten by other code.
 * @param {String/HTMLElement} el The dom node or id
 * @param {String} named (optional) Allows for creation of named reusable flyweights to
 *                                  prevent conflicts (e.g. internally Ext uses "_internal")
 * @static
 * @return {Element} The shared Element object (or null if no matching element was found)
 */
El.fly = function(el, named){
    named = named || '_global';
    el = Ext.getDom(el);
    if(!el){
        return null;
    }
    if(!El._flyweights[named]){
        El._flyweights[named] = new El.Flyweight();
    }
    El._flyweights[named].dom = el;
    return El._flyweights[named];
};

/**
 * Static method to retrieve Element objects. Uses simple caching to consistently return the same object.
 * Automatically fixes if an object was recreated with the same id via AJAX or DOM.
 * Shorthand of {@link Ext.Element#get}
 * @param {Mixed} el The id of the node, a DOM Node or an existing Element.
 * @return {Element} The Element object
 * @member Ext
 * @method get
 */
Ext.get = El.get;
/**
 * Gets the globally shared flyweight Element, with the passed node as the active element. Do not store a reference to this element -
 * the dom node can be overwritten by other code.
 * Shorthand of {@link Ext.Element#fly}
 * @param {String/HTMLElement} el The dom node or id
 * @param {String} named (optional) Allows for creation of named reusable flyweights to
 *                                  prevent conflicts (e.g. internally Ext uses "_internal")
 * @static
 * @return {Element} The shared Element object
 * @member Ext
 * @method fly
 */
Ext.fly = El.fly;

// speedy lookup for elements never to box adjust
var noBoxAdjust = Ext.isStrict ? {
    select:1
} : {
    input:1, select:1, textarea:1
};
if(Ext.isIE || Ext.isGecko){
    noBoxAdjust['button'] = 1;
}


Ext.EventManager.on(window, 'unload', function(){
    delete El.cache;
    delete El._flyweights;
});
})();