Ext.onReady(function () {

            var winp;

            var button = Ext.get('show-btn');

            button.on('click', function () {

                if (!winp) {

                    var win = new Object();

                    win.applyTo = 'Container';

                    win.layout = 'fit';

                    win.width = 500;

                    win.height = 300;

                    win.closeAction = 'hide';

                    win.plain = true;

                    win.items = new Ext.TabPanel(

                        {

                            applyTo: 'hello-tabs',

                            autoTabs: true,

                            activeTab: 0,

                            deferredRender: false,

                            border: false

                        });



                    win.buttons = [];

                    win.buttons.push({text:'Submit',disabled:true});

                    win.buttons.push({text:'Close',handler:function(){winp.hide();}});

  

                }

                winp = new Ext.Window(win);