/*global Ext*/

    Ext.ux.MyExtendedClass = Ext.extend(Ext.util.Observable, 

                                        (function() {

        // private static fields (can access only to scope: minimum privileges).

        var privStaticVar = 0;

        // private static functions (can access only to scope and arguments, but we can send them the scope by param)

        var privateFunc1 = function(me) { return me.name + ' -> ClassVar:' + privStaticVar; };

        var privateFunc2 = function(me) { return me.publicMethod1() + ' InstanceVar:' + me.getPrivateVar(); };

        return {

            constructor: function(config) {

                // privileged private/public members (can access to anything privated and public)

                var privateVar = config.v || 0;

                var privInstFunc = function() { privateVar += 1; };

                this.name = config.name;

                this.incVariables = function() { privInstFunc(); privStaticVar += 1; };

                this.getPrivateVar = function() { return privateVar; };

            },

            // public members (can access to public and private static, but not to the members defined in the constructor)

            publicMethod1: function() { this.incVariables(); return privateFunc1(this); }

        };

      }())

    );

​

    function test() {

      var o1 = new Ext.ux.MyExtendedClass({name: 'o1', v: 0});

      var o2 = new Ext.ux.MyExtendedClass({name: 'o2', v: 10});

      var s = o1.publicMethod2() + '<br>' + o1.publicMethod2() + '<br><br>' + o2.publicMethod2() + '<br>' + o2.publicMethod2(); 

      Ext.get("output").update(s); console.log(s);

    }