    Ext = {version: '3.0'};

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

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

    /**
     * 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,
            ua = navigator.userAgent.toLowerCase(),
            check = function(r){
                return r.test(ua);
            },
            isStrict = document.compatMode == "CSS1Compat",
            isOpera = check(/opera/),
            isChrome = check(/chrome/),
            isWebKit = check(/webkit/),
            isSafari = !isChrome && check(/safari/),
            isSafari3 = isSafari && check(/version\/3/),
            isSafari4 = isSafari && check(/version\/4/),
            isIE = !isOpera && check(/msie/),
            isIE7 = isIE && check(/msie 7/),
            isIE8 = isIE && check(/msie 8/),
            isGecko = !isWebKit && check(/gecko/),
            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(isIE && !isIE7){
            try{
                document.execCommand("BackgroundImageCache", false, true);
            }catch(e){}
        }

        Ext.apply(Ext, {
            /**
             * 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 after uncaching an element (defaults to false).
             * Note: this only happens if {@link #enableGarbageCollector} is true.
             * @type Boolean
             */
            enableListenerCollection : 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.isEmpty(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 with another class and optionally overrides members with the passed literal. This class
             * also adds the function "override()" to the class that can be used to override
             * members on an instance.
             * *
             * This function also supports a 2-argument call in which the subclass's constructor is
             * not passed as an argument. In this form, the parameters are as follows:
             *
             * superclass
             * The class being extended
             * overrides
             * A literal with members which are copied into the subclass's
             * prototype, and are therefore shared among 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.
             *
             * For example, to create a subclass of the Ext GridPanel:
             *
    MyGridPanel = Ext.extend(Ext.grid.GridPanel, {
        constructor: function(config) {
            // Your preprocessing here
            MyGridPanel.superclass.constructor.apply(this, arguments);
            // Your postprocessing here
        },

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

             *
             * @param {Function} subclass The class inheriting the functionality
             * @param {Function} superclass The class being extended
             * @param {Object} overrides (optional) A literal with members which are copied into the subclass's
             * prototype, and are therefore shared between all instances of the new class.
             * @return {Function} The subclass constructor.
             * @method extend
             */
            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){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.toString != origclass.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
             * @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
             * @return {String}
             */
            urlEncode : function(o, pre){
                var buf = [],
                    key,
                    e = encodeURIComponent;

                for(key in o) {
                    Ext.each(o[key] || key, function(val, i) {
                        buf.push("&", e(key), "=", val != key ? 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){
                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;
            },

            /**
             * 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 = [];
                        Ext.each(a, function(v) {
                            res.push(v);
                        });
                        return res.slice(i || 0, j || res.length);
                    } :
                    function(a, i, j){
                        return Array.prototype.slice.call(a, i || 0, j || a.length);
                    }
            }(),

            /**
             * Iterates an array calling the passed function with each item, stopping if your function returns false. If the
             * passed array is not really an array, your function is called once with it.
             * The supplied function is called with (Object item, Number index, Array allItems).
             * @param {Array/NodeList/Mixed} array
             * @param {Function} fn
             * @param {Object} scope
             */
            each : function(array, fn, scope){
                if(Ext.isEmpty(array, true)) return;
                if (typeof array.length == "undefined" || typeof array == "string"){
                    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; };
                }
            },

            /**
             * Return the dom node for the passed string (id), dom node, or Ext.Element.
             * 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 || !document){
                    return null;
                }
                return el.dom ? el.dom : (typeof el == 'string' ? document.getElementById(el) : el);
            },

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

            /**
             * Removes a DOM node from the document.  The body node will be ignored if passed in.
             * @param {HTMLElement} node The node to remove
             */
            removeNode : isIE ? function(){
                var d;
                return function(n){
                    if(n && n.tagName != 'BODY'){
                        d = d || document.createElement('div');
                        d.appendChild(n);
                        d.innerHTML = '';
                    }
                }
            }() : function(n){
                if(n && n.parentNode && n.tagName != 'BODY'){
                    n.parentNode.removeChild(n);
                }
            },

            /**
             * 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 object is a JavaScript array, otherwise false.
             * @param {Object} object The object to test
             * @return {Boolean}
             */
            isArray : function(v){
                return Object.prototype.toString.apply(v) === '[object Array]';
            },

            /**
             * Returns true if the passed object is a JavaScript Object, otherwise false.
             * @param {Object} object The object to test
             * @return {Boolean}
             */
            isObject : function(v){
                return v && typeof v == "object";
            },

            /**
             * Returns true if the passed object is a JavaScript 'primitive', a string, number or boolean.
             * @param {Mixed} value The value to test
             * @return {Boolean}
             */
            isPrimitive: function(v){
                var t = typeof v;
                return t == 'string' || t == 'number' || t == 'boolean';
            },

            /**
             * Returns true if the passed object is a JavaScript Function, otherwise false.
             * @param {Object} object The object to test
             * @return {Boolean}
             */
            isFunction : function(v){
                return typeof v == "function";
            },

            /**
             * 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 : isSafari && !isSafari3,
            /**
             * 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 : isIE && !isIE7 && !isIE8,
            /**
             * 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 : isGecko && !isGecko3,
            /**
             * 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
        });

        // in intellij using keyword "namespace" causes parsing errors
        Ext.ns = Ext.namespace;
    })();

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

    /**
     * @class Function
     * These functions are available on every Function object (any JavaScript function).
     */
    Ext.apply(Function.prototype, {
         /**
         * Creates an interceptor function. The passed fcn 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 fcn 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 of the passed fcn (Defaults to scope of original function or 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} obj (optional) The object for which the scope is set
         * @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 (typeof appendArgs == "number"){
                    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 0 the function is executed immediately)
         * @param {Object} obj (optional) The object for which the scope is set
         * @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){
                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
         * @return {Number} The index of o in the array (or -1 if it is not found)
         */
        indexOf : function(o){
           for (var i = 0, len = this.length; i < len; i++){
               if(this[i] == o) return i;
           }
           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;
        }
    });