    // for old browsers
    window.undefined = window.undefined;

    /**
     * @class Ext
     * Ext core utilities and functions.
     * @singleton
     */

    Ext = {
        /**
         * The version of the framework
         * @type String
         */
        version : '3.1.0'
    };

    /**
     * Copies all the properties of config to obj.
     * @param {Object} obj The receiver of the properties
     * @param {Object} config The source of the properties
     * @param {Object} defaults A different object that will also be applied for default values
     * @return {Object} returns obj
     * @member Ext apply
     */
    Ext.apply = function(o, c, defaults){
        // no "this" reference for friendly out of scope calls
        if(defaults){
            Ext.apply(o, defaults);
        }
        if(o && c && typeof c == 'object'){
            for(var p in c){
                o[p] = c[p];
            }
        }
        return o;
    };

    (function(){
        var idSeed = 0,
            toString = Object.prototype.toString,
            ua = navigator.userAgent.toLowerCase(),
            check = function(r){
                return r.test(ua);
            },
            DOC = document,
            isStrict = DOC.compatMode == "CSS1Compat",
            isOpera = check(/opera/),
            isChrome = check(/chrome/),
            isWebKit = check(/webkit/),
            isSafari = !isChrome && check(/safari/),
            isSafari2 = isSafari && check(/applewebkit\/4/), // unique to Safari 2
            isSafari3 = isSafari && check(/version\/3/),
            isSafari4 = isSafari && check(/version\/4/),
            isIE = !isOpera && check(/msie/),
            isIE7 = isIE && check(/msie 7/),
            isIE8 = isIE && check(/msie 8/),
            isIE6 = isIE && !isIE7 && !isIE8,
            isGecko = !isWebKit && check(/gecko/),
            isGecko2 = isGecko && check(/rv:1\.8/),
            isGecko3 = isGecko && check(/rv:1\.9/),
            isBorderBox = isIE && !isStrict,
            isWindows = check(/windows|win32/),
            isMac = check(/macintosh|mac os x/),
            isAir = check(/adobeair/),
            isLinux = check(/linux/),
            isSecure = /^https/i.test(window.location.protocol);

        // remove css image flicker
        if(isIE6){
            try{
                DOC.execCommand("BackgroundImageCache", false, true);
            }catch(e){}
        }

        Ext.apply(Ext, {
            /**
             * URL to a blank file used by Ext when in secure mode for iframe src and onReady src to prevent
             * the IE insecure content warning ('about:blank', except for IE in secure mode, which is 'javascript:""').
             * @type String
             */
            SSL_SECURE_URL : isSecure && isIE ? 'javascript:""' : 'about:blank',
            /**
             * True if the browser is in strict (standards-compliant) mode, as opposed to quirks mode
             * @type Boolean
             */
            isStrict : isStrict,
            /**
             * True if the page is running over SSL
             * @type Boolean
             */
            isSecure : isSecure,
            /**
             * True when the document is fully initialized and ready for action
             * @type Boolean
             */
            isReady : false,

            /**
             * True if the {@link Ext.Fx} Class is available
             * @type Boolean
             * @property enableFx
             */

            /**
             * True to automatically uncache orphaned Ext.Elements periodically (defaults to true)
             * @type Boolean
             */
            enableGarbageCollector : true,

            /**
             * True to automatically purge event listeners during garbageCollection (defaults to false).
             * @type Boolean
             */
            enableListenerCollection : false,

            /**
             * EXPERIMENTAL - True to cascade listener removal to child elements when an element is removed.
             * Currently not optimized for performance.
             * @type Boolean
             */
            enableNestedListenerRemoval : false,

            /**
             * Indicates whether to use native browser parsing for JSON methods.
             * This option is ignored if the browser does not support native JSON methods.
             * Note: Native JSON methods will not work with objects that have functions.
             * Also, property names must be quoted, otherwise the data will not parse. (Defaults to false)
             * @type Boolean
             */
            USE_NATIVE_JSON : false,

            /**
             * Copies all the properties of config to obj if they don't already exist.
             * @param {Object} obj The receiver of the properties
             * @param {Object} config The source of the properties
             * @return {Object} returns obj
             */
            applyIf : function(o, c){
                if(o){
                    for(var p in c){
                        if(!Ext.isDefined(o[p])){
                            o[p] = c[p];
                        }
                    }
                }
                return o;
            },

            /**
             * Generates unique ids. If the element already has an id, it is unchanged
             * @param {Mixed} el (optional) The element to generate an id for
             * @param {String} prefix (optional) Id prefix (defaults "ext-gen")
             * @return {String} The generated Id.
             */
            id : function(el, prefix){
                return (el = Ext.getDom(el) || {}).id = el.id || (prefix || "ext-gen") + (++idSeed);
            },

            /**
             * Extends one class to create a subclass and optionally overrides members with the passed literal. This method
             * also adds the function "override()" to the subclass that can be used to override members of the class.
             * For example, to create a subclass of Ext GridPanel:
             *
    MyGridPanel = Ext.extend(Ext.grid.GridPanel, {
        constructor: function(config) {

    //      Create configuration for this Grid.
            var store = new Ext.data.Store({...});
            var colModel = new Ext.grid.ColumnModel({...});

    //      Create a new config object containing our computed properties
    //      *plus* whatever was in the config parameter.
            config = Ext.apply({
                store: store,
                colModel: colModel
            }, config);

            MyGridPanel.superclass.constructor.call(this, config);

    //      Your postprocessing here
        },

        yourMethod: function() {
            // etc.
        }
    });

             *
             * This function also supports a 3-argument call in which the subclass's constructor is
             * passed as an argument. In this form, the parameters are as follows:
             *
             * subclass : Function The subclass constructor.
             * superclass : Function The constructor of class being extended
             * overrides : Object A literal with members which are copied into the subclass's
             * prototype, and are therefore shared among all instances of the new class.
             *
             *
             * @param {Function} superclass The constructor of class being extended.
             * @param {Object} overrides A literal with members which are copied into the subclass's
             * prototype, and are therefore shared between all instances of the new class.
             * This may contain a special member named constructor. This is used
             * to define the constructor of the new class, and is returned. If this property is
             * not specified, a constructor is generated and returned which just calls the
             * superclass's constructor passing on its parameters.
             * It is essential that you call the superclass constructor in any provided constructor. See example code.
             * @return {Function} The subclass constructor from the overrides parameter, or a generated one if not provided.
             */
            extend : function(){
                // inline overrides
                var io = function(o){
                    for(var m in o){
                        this[m] = o[m];
                    }
                };
                var oc = Object.prototype.constructor;

                return function(sb, sp, overrides){
                    if(Ext.isObject(sp)){
                        overrides = sp;
                        sp = sb;
                        sb = overrides.constructor != oc ? overrides.constructor : function(){sp.apply(this, arguments);};
                    }
                    var F = function(){},
                        sbp,
                        spp = sp.prototype;

                    F.prototype = spp;
                    sbp = sb.prototype = new F();
                    sbp.constructor=sb;
                    sb.superclass=spp;
                    if(spp.constructor == oc){
                        spp.constructor=sp;
                    }
                    sb.override = function(o){
                        Ext.override(sb, o);
                    };
                    sbp.superclass = sbp.supr = (function(){
                        return spp;
                    });
                    sbp.override = io;
                    Ext.override(sb, overrides);
                    sb.extend = function(o){return Ext.extend(sb, o);};
                    return sb;
                };
            }(),

            /**
             * Adds a list of functions to the prototype of an existing class, overwriting any existing methods with the same name.
             * Usage:
    Ext.override(MyClass, {
        newMethod1: function(){
            // etc.
        },
        newMethod2: function(foo){
            // etc.
        }
    });

             * @param {Object} origclass The class to override
             * @param {Object} overrides The list of functions to add to origClass.  This should be specified as an object literal
             * containing one or more methods.
             * @method override
             */
            override : function(origclass, overrides){
                if(overrides){
                    var p = origclass.prototype;
                    Ext.apply(p, overrides);
                    if(Ext.isIE && overrides.hasOwnProperty('toString')){
                        p.toString = overrides.toString;
                    }
                }
            },

            /**
             * Creates namespaces to be used for scoping variables and classes so that they are not global.
             * Specifying the last node of a namespace implicitly creates all other nodes. Usage:
             *
    Ext.namespace('Company', 'Company.data');
    Ext.namespace('Company.data'); // equivalent and preferable to above syntax
    Company.Widget = function() { ... }
    Company.data.CustomStore = function(config) { ... }

             * @param {String} namespace1
             * @param {String} namespace2
             * @param {String} etc
             * @return {Object} The namespace object. (If multiple arguments are passed, this will be the last namespace created)
             * @method namespace
             */
            namespace : function(){
                var o, d;
                Ext.each(arguments, function(v) {
                    d = v.split(".");
                    o = window[d[0]] = window[d[0]] || {};
                    Ext.each(d.slice(1), function(v2){
                        o = o[v2] = o[v2] || {};
                    });
                });
                return o;
            },

            /**
             * Takes an object and converts it to an encoded URL. e.g. Ext.urlEncode({foo: 1, bar: 2}); would return "foo=1&bar=2".  Optionally, property values can be arrays, instead of keys and the resulting string that's returned will contain a name/value pair for each array value.
             * @param {Object} o
             * @param {String} pre (optional) A prefix to add to the url encoded string
             * @return {String}
             */
            urlEncode : function(o, pre){
                var empty,
                    buf = [],
                    e = encodeURIComponent;

                Ext.iterate(o, function(key, item){
                    empty = Ext.isEmpty(item);
                    Ext.each(empty ? key : item, function(val){
                        buf.push('&', e(key), '=', (!Ext.isEmpty(val) && (val != key || !empty)) ? (Ext.isDate(val) ? Ext.encode(val).replace(/"/g, '') : e(val)) : '');
                    });
                });
                if(!pre){
                    buf.shift();
                    pre = '';
                }
                return pre + buf.join('');
            },

            /**
             * Takes an encoded URL and and converts it to an object. Example:
    Ext.urlDecode("foo=1&bar=2"); // returns {foo: "1", bar: "2"}
    Ext.urlDecode("foo=1&bar=2&bar=3&bar=4", false); // returns {foo: "1", bar: ["2", "3", "4"]}

             * @param {String} string
             * @param {Boolean} overwrite (optional) Items of the same name will overwrite previous values instead of creating an an array (Defaults to false).
             * @return {Object} A literal with members
             */
            urlDecode : function(string, overwrite){
                if(Ext.isEmpty(string)){
                    return {};
                }
                var obj = {},
                    pairs = string.split('&'),
                    d = decodeURIComponent,
                    name,
                    value;
                Ext.each(pairs, function(pair) {
                    pair = pair.split('=');
                    name = d(pair[0]);
                    value = d(pair[1]);
                    obj[name] = overwrite || !obj[name] ? value :
                                [].concat(obj[name]).concat(value);
                });
                return obj;
            },

            /**
             * Appends content to the query string of a URL, handling logic for whether to place
             * a question mark or ampersand.
             * @param {String} url The URL to append to.
             * @param {String} s The content to append to the URL.
             * @return (String) The resulting URL
             */
            urlAppend : function(url, s){
                if(!Ext.isEmpty(s)){
                    return url + (url.indexOf('?') === -1 ? '?' : '&') + s;
                }
                return url;
            },

            /**
             * Converts any iterable (numeric indices and a length property) into a true array
             * Don't use this on strings. IE doesn't support "abc"[0] which this implementation depends on.
             * For strings, use this instead: "abc".match(/./g) => [a,b,c];
             * @param {Iterable} the iterable object to be turned into a true Array.
             * @return (Array) array
             */
             toArray : function(){
                 return isIE ?
                     function(a, i, j, res){
                         res = [];
                         for(var x = 0, len = a.length; x < len; x++) {
                             res.push(a[x]);
                         }
                         return res.slice(i || 0, j || res.length);
                     } :
                     function(a, i, j){
                         return Array.prototype.slice.call(a, i || 0, j || a.length);
                     }
             }(),

            isIterable : function(v){
                //check for array or arguments
                if(Ext.isArray(v) || v.callee){
                    return true;
                }
                //check for node list type
                if(/NodeList|HTMLCollection/.test(toString.call(v))){
                    return true;
                }
                //NodeList has an item and length property
                //IXMLDOMNodeList has nextNode method, needs to be checked first.
                return ((v.nextNode || v.item) && Ext.isNumber(v.length));
            },

            /**
             * Iterates an array calling the supplied function.
             * @param {Array/NodeList/Mixed} array The array to be iterated. If this
             * argument is not really an array, the supplied function is called once.
             * @param {Function} fn The function to be called with each item. If the
             * supplied function returns false, iteration stops and this method returns
             * the current index. This function is called with
             * the following arguments:
             *
             * item : Mixed
             * The item at the current index
             * in the passed array
             * index : Number
             * The current index within the array
             * allItems : Array
             * The array passed as the first
             * argument to Ext.each.
             *
             * @param {Object} scope The scope (this reference) in which the specified function is executed.
             * Defaults to the item at the current index
             * within the passed array.
             * @return See description for the fn parameter.
             */
            each : function(array, fn, scope){
                if(Ext.isEmpty(array, true)){
                    return;
                }
                if(!Ext.isIterable(array) || Ext.isPrimitive(array)){
                    array = [array];
                }
                for(var i = 0, len = array.length; i < len; i++){
                    if(fn.call(scope || array[i], array[i], i, array) === false){
                        return i;
                    };
                }
            },

            /**
             * Iterates either the elements in an array, or each of the properties in an object.
             * Note: If you are only iterating arrays, it is better to call {@link #each}.
             * @param {Object/Array} object The object or array to be iterated
             * @param {Function} fn The function to be called for each iteration.
             * The iteration will stop if the supplied function returns false, or
             * all array elements / object properties have been covered. The signature
             * varies depending on the type of object being interated:
             *
             * Arrays : (Object item, Number index, Array allItems)
             *
             * When iterating an array, the supplied function is called with each item.
             * Objects : (String key, Object value, Object)
             *
             * When iterating an object, the supplied function is called with each key-value pair in
             * the object, and the iterated object
             *
             * @param {Object} scope The scope (this reference) in which the specified function is executed. Defaults to
             * the object being iterated.
             */
            iterate : function(obj, fn, scope){
                if(Ext.isEmpty(obj)){
                    return;
                }
                if(Ext.isIterable(obj)){
                    Ext.each(obj, fn, scope);
                    return;
                }else if(Ext.isObject(obj)){
                    for(var prop in obj){
                        if(obj.hasOwnProperty(prop)){
                            if(fn.call(scope || obj, prop, obj[prop], obj) === false){
                                return;
                            };
                        }
                    }
                }
            },

            /**
             * Return the dom node for the passed String (id), dom node, or Ext.Element.
             * Here are some examples:
             *
    // gets dom node based on id
    var elDom = Ext.getDom('elId');
    // gets dom node based on the dom node
    var elDom1 = Ext.getDom(elDom);

    // If we don't know if we are working with an
    // Ext.Element or a dom node use Ext.getDom
    function(el){
        var dom = Ext.getDom(el);
        // do something with the dom node
    }
             *
             * Note: the dom node to be found actually needs to exist (be rendered, etc)
             * when this method is called to be successful.
             * @param {Mixed} el
             * @return HTMLElement
             */
            getDom : function(el){
                if(!el || !DOC){
                    return null;
                }
                return el.dom ? el.dom : (Ext.isString(el) ? DOC.getElementById(el) : el);
            },

            /**
             * Returns the current document body as an {@link Ext.Element}.
             * @return Ext.Element The document body
             */
            getBody : function(){
                return Ext.get(DOC.body || DOC.documentElement);
            },

            /**
             * Removes a DOM node from the document.
             */
            /**
             * Removes this element from the document, removes all DOM event listeners, and deletes the cache reference.
             * All DOM event listeners are removed from this element. If {@link Ext#enableNestedListenerRemoval} is
             * true, then DOM event listeners are also removed from all child nodes. The body node
             * will be ignored if passed in.
             * @param {HTMLElement} node The node to remove
             */
            removeNode : isIE && !isIE8 ? function(){
                var d;
                return function(n){
                    if(n && n.tagName != 'BODY'){
                        (Ext.enableNestedListenerRemoval) ? Ext.EventManager.purgeElement(n, true) : Ext.EventManager.removeAll(n);
                        d = d || DOC.createElement('div');
                        d.appendChild(n);
                        d.innerHTML = '';
                        delete Ext.elCache[n.id];
                    }
                }
            }() : function(n){
                if(n && n.parentNode && n.tagName != 'BODY'){
                    (Ext.enableNestedListenerRemoval) ? Ext.EventManager.purgeElement(n, true) : Ext.EventManager.removeAll(n);
                    n.parentNode.removeChild(n);
                    delete Ext.elCache[n.id];
                }
            },

            /**
             * Returns true if the passed value is empty.
             * The value is deemed to be empty if it is
             * null
             * undefined
             * an empty array
             * a zero length string (Unless the allowBlank parameter is true)
             *
             * @param {Mixed} value The value to test
             * @param {Boolean} allowBlank (optional) true to allow empty strings (defaults to false)
             * @return {Boolean}
             */
            isEmpty : function(v, allowBlank){
                return v === null || v === undefined || ((Ext.isArray(v) && !v.length)) || (!allowBlank ? v === '' : false);
            },

            /**
             * Returns true if the passed value is a JavaScript array, otherwise false.
             * @param {Mixed} value The value to test
             * @return {Boolean}
             */
            isArray : function(v){
                return toString.apply(v) === '[object Array]';
            },

            /**
             * Returns true if the passed object is a JavaScript date object, otherwise false.
             * @param {Object} object The object to test
             * @return {Boolean}
             */
            isDate : function(v){
                return toString.apply(v) === '[object Date]';
            },

            /**
             * Returns true if the passed value is a JavaScript Object, otherwise false.
             * @param {Mixed} value The value to test
             * @return {Boolean}
             */
            isObject : function(v){
                return !!v && Object.prototype.toString.call(v) === '[object Object]';
            },

            /**
             * Returns true if the passed value is a JavaScript 'primitive', a string, number or boolean.
             * @param {Mixed} value The value to test
             * @return {Boolean}
             */
            isPrimitive : function(v){
                return Ext.isString(v) || Ext.isNumber(v) || Ext.isBoolean(v);
            },

            /**
             * Returns true if the passed value is a JavaScript Function, otherwise false.
             * @param {Mixed} value The value to test
             * @return {Boolean}
             */
            isFunction : function(v){
                return toString.apply(v) === '[object Function]';
            },

            /**
             * Returns true if the passed value is a number. Returns false for non-finite numbers.
             * @param {Mixed} value The value to test
             * @return {Boolean}
             */
            isNumber : function(v){
                return typeof v === 'number' && isFinite(v);
            },

            /**
             * Returns true if the passed value is a string.
             * @param {Mixed} value The value to test
             * @return {Boolean}
             */
            isString : function(v){
                return typeof v === 'string';
            },

            /**
             * Returns true if the passed value is a boolean.
             * @param {Mixed} value The value to test
             * @return {Boolean}
             */
            isBoolean : function(v){
                return typeof v === 'boolean';
            },

            /**
             * Returns true if the passed value is an HTMLElement
             * @param {Mixed} value The value to test
             * @return {Boolean}
             */
            isElement : function(v) {
                return !!v && v.tagName;
            },

            /**
             * Returns true if the passed value is not undefined.
             * @param {Mixed} value The value to test
             * @return {Boolean}
             */
            isDefined : function(v){
                return typeof v !== 'undefined';
            },

            /**
             * True if the detected browser is Opera.
             * @type Boolean
             */
            isOpera : isOpera,
            /**
             * True if the detected browser uses WebKit.
             * @type Boolean
             */
            isWebKit : isWebKit,
            /**
             * True if the detected browser is Chrome.
             * @type Boolean
             */
            isChrome : isChrome,
            /**
             * True if the detected browser is Safari.
             * @type Boolean
             */
            isSafari : isSafari,
            /**
             * True if the detected browser is Safari 3.x.
             * @type Boolean
             */
            isSafari3 : isSafari3,
            /**
             * True if the detected browser is Safari 4.x.
             * @type Boolean
             */
            isSafari4 : isSafari4,
            /**
             * True if the detected browser is Safari 2.x.
             * @type Boolean
             */
            isSafari2 : isSafari2,
            /**
             * True if the detected browser is Internet Explorer.
             * @type Boolean
             */
            isIE : isIE,
            /**
             * True if the detected browser is Internet Explorer 6.x.
             * @type Boolean
             */
            isIE6 : isIE6,
            /**
             * True if the detected browser is Internet Explorer 7.x.
             * @type Boolean
             */
            isIE7 : isIE7,
            /**
             * True if the detected browser is Internet Explorer 8.x.
             * @type Boolean
             */
            isIE8 : isIE8,
            /**
             * True if the detected browser uses the Gecko layout engine (e.g. Mozilla, Firefox).
             * @type Boolean
             */
            isGecko : isGecko,
            /**
             * True if the detected browser uses a pre-Gecko 1.9 layout engine (e.g. Firefox 2.x).
             * @type Boolean
             */
            isGecko2 : isGecko2,
            /**
             * True if the detected browser uses a Gecko 1.9+ layout engine (e.g. Firefox 3.x).
             * @type Boolean
             */
            isGecko3 : isGecko3,
            /**
             * True if the detected browser is Internet Explorer running in non-strict mode.
             * @type Boolean
             */
            isBorderBox : isBorderBox,
            /**
             * True if the detected platform is Linux.
             * @type Boolean
             */
            isLinux : isLinux,
            /**
             * True if the detected platform is Windows.
             * @type Boolean
             */
            isWindows : isWindows,
            /**
             * True if the detected platform is Mac OS.
             * @type Boolean
             */
            isMac : isMac,
            /**
             * True if the detected platform is Adobe Air.
             * @type Boolean
             */
            isAir : isAir
        });

        /**
         * Creates namespaces to be used for scoping variables and classes so that they are not global.
         * Specifying the last node of a namespace implicitly creates all other nodes. Usage:
         *
    Ext.namespace('Company', 'Company.data');
    Ext.namespace('Company.data'); // equivalent and preferable to above syntax
    Company.Widget = function() { ... }
    Company.data.CustomStore = function(config) { ... }

         * @param {String} namespace1
         * @param {String} namespace2
         * @param {String} etc
         * @return {Object} The namespace object. (If multiple arguments are passed, this will be the last namespace created)
         * @method ns
         */
        Ext.ns = Ext.namespace;
    })();

    Ext.ns("Ext.util", "Ext.lib", "Ext.data");

    Ext.elCache = {};

    /**
     * @class Function
     * These functions are available on every Function object (any JavaScript function).
     */
    Ext.apply(Function.prototype, {
         /**
         * Creates an interceptor function. The passed function is called before the original one. If it returns false,
         * the original one is not called. The resulting function returns the results of the original function.
         * The passed function is called with the parameters of the original function. Example usage:
         *
    var sayHi = function(name){
        alert('Hi, ' + name);
    }

    sayHi('Fred'); // alerts "Hi, Fred"

    // create a new function that validates input without
    // directly modifying the original function:
    var sayHiToFriend = sayHi.createInterceptor(function(name){
        return name == 'Brian';
    });

    sayHiToFriend('Fred');  // no alert
    sayHiToFriend('Brian'); // alerts "Hi, Brian"

         * @param {Function} fcn The function to call before the original
         * @param {Object} scope (optional) The scope (this reference) in which the passed function is executed.
         * If omitted, defaults to the scope in which the original function is called or the browser window.
         * @return {Function} The new function
         */
        createInterceptor : function(fcn, scope){
            var method = this;
            return !Ext.isFunction(fcn) ?
                    this :
                    function() {
                        var me = this,
                            args = arguments;
                        fcn.target = me;
                        fcn.method = method;
                        return (fcn.apply(scope || me || window, args) !== false) ?
                                method.apply(me || window, args) :
                                null;
                    };
        },

         /**
         * Creates a callback that passes arguments[0], arguments[1], arguments[2], ...
         * Call directly on any function. Example: myFunction.createCallback(arg1, arg2)
         * Will create a function that is bound to those 2 args. If a specific scope is required in the
         * callback, use {@link #createDelegate} instead. The function returned by createCallback always
         * executes in the window scope.
         * This method is required when you want to pass arguments to a callback function.  If no arguments
         * are needed, you can simply pass a reference to the function as a callback (e.g., callback: myFn).
         * However, if you tried to pass a function with arguments (e.g., callback: myFn(arg1, arg2)) the function
         * would simply execute immediately when the code is parsed. Example usage:
         *
    var sayHi = function(name){
        alert('Hi, ' + name);
    }

    // clicking the button alerts "Hi, Fred"
    new Ext.Button({
        text: 'Say Hi',
        renderTo: Ext.getBody(),
        handler: sayHi.createCallback('Fred')
    });

         * @return {Function} The new function
        */
        createCallback : function(/*args...*/){
            // make args available, in function below
            var args = arguments,
                method = this;
            return function() {
                return method.apply(window, args);
            };
        },

        /**
         * Creates a delegate (callback) that sets the scope to obj.
         * Call directly on any function. Example: this.myFunction.createDelegate(this, [arg1, arg2])
         * Will create a function that is automatically scoped to obj so that the this variable inside the
         * callback points to obj. Example usage:
         *
    var sayHi = function(name){
        // Note this use of "this.text" here.  This function expects to
        // execute within a scope that contains a text property.  In this
        // example, the "this" variable is pointing to the btn object that
        // was passed in createDelegate below.
        alert('Hi, ' + name + '. You clicked the "' + this.text + '" button.');
    }

    var btn = new Ext.Button({
        text: 'Say Hi',
        renderTo: Ext.getBody()
    });

    // This callback will execute in the scope of the
    // button instance. Clicking the button alerts
    // "Hi, Fred. You clicked the "Say Hi" button."
    btn.on('click', sayHi.createDelegate(btn, ['Fred']));

         * @param {Object} scope (optional) The scope (this reference) in which the function is executed.
         * If omitted, defaults to the browser window.
         * @param {Array} args (optional) Overrides arguments for the call. (Defaults to the arguments passed by the caller)
         * @param {Boolean/Number} appendArgs (optional) if True args are appended to call args instead of overriding,
         * if a number the args are inserted at the specified position
         * @return {Function} The new function
         */
        createDelegate : function(obj, args, appendArgs){
            var method = this;
            return function() {
                var callArgs = args || arguments;
                if (appendArgs === true){
                    callArgs = Array.prototype.slice.call(arguments, 0);
                    callArgs = callArgs.concat(args);
                }else if (Ext.isNumber(appendArgs)){
                    callArgs = Array.prototype.slice.call(arguments, 0); // copy arguments first
                    var applyArgs = [appendArgs, 0].concat(args); // create method call params
                    Array.prototype.splice.apply(callArgs, applyArgs); // splice them in
                }
                return method.apply(obj || window, callArgs);
            };
        },

        /**
         * Calls this function after the number of millseconds specified, optionally in a specific scope. Example usage:
         *
    var sayHi = function(name){
        alert('Hi, ' + name);
    }

    // executes immediately:
    sayHi('Fred');

    // executes after 2 seconds:
    sayHi.defer(2000, this, ['Fred']);

    // this syntax is sometimes useful for deferring
    // execution of an anonymous function:
    (function(){
        alert('Anonymous');
    }).defer(100);

         * @param {Number} millis The number of milliseconds for the setTimeout call (if less than or equal to 0 the function is executed immediately)
         * @param {Object} scope (optional) The scope (this reference) in which the function is executed.
         * If omitted, defaults to the browser window.
         * @param {Array} args (optional) Overrides arguments for the call. (Defaults to the arguments passed by the caller)
         * @param {Boolean/Number} appendArgs (optional) if True args are appended to call args instead of overriding,
         * if a number the args are inserted at the specified position
         * @return {Number} The timeout id that can be used with clearTimeout
         */
        defer : function(millis, obj, args, appendArgs){
            var fn = this.createDelegate(obj, args, appendArgs);
            if(millis > 0){
                return setTimeout(fn, millis);
            }
            fn();
            return 0;
        }
    });

    /**
     * @class String
     * These functions are available on every String object.
     */
    Ext.applyIf(String, {
        /**
         * Allows you to define a tokenized string and pass an arbitrary number of arguments to replace the tokens.  Each
         * token must be unique, and must increment in the format {0}, {1}, etc.  Example usage:
         *
    var cls = 'my-class', text = 'Some text';
    var s = String.format('<div class="{0}">{1}</div>', cls, text);
    // s now contains the string: '<div class="my-class">Some text</div>'
         *
         * @param {String} string The tokenized string to be formatted
         * @param {String} value1 The value to replace token {0}
         * @param {String} value2 Etc...
         * @return {String} The formatted string
         * @static
         */
        format : function(format){
            var args = Ext.toArray(arguments, 1);
            return format.replace(/\{(\d+)\}/g, function(m, i){
                return args[i];
            });
        }
    });

    /**
     * @class Array
     */
    Ext.applyIf(Array.prototype, {
        /**
         * Checks whether or not the specified object exists in the array.
         * @param {Object} o The object to check for
         * @param {Number} from (Optional) The index at which to begin the search
         * @return {Number} The index of o in the array (or -1 if it is not found)
         */
        indexOf : function(o, from){
            var len = this.length;
            from = from || 0;
            from += (from < 0) ? len : 0;
            for (; from < len; ++from){
                if(this[from] === o){
                    return from;
                }
            }
            return -1;
        },

        /**
         * Removes the specified object from the array.  If the object is not found nothing happens.
         * @param {Object} o The object to remove
         * @return {Array} this array
         */
        remove : function(o){
            var index = this.indexOf(o);
            if(index != -1){
                this.splice(index, 1);
            }
            return this;
        }
    });