Ext.setup({ onReady: function() { var twitter ={ dock:"top", style:"background-color: #000099;color:white;", title: "twitter", html: "some content from twitter comes here" } var plus ={ dock:"top", style:"background-color: #aaaaa;color:black;", title: "Google Plus", html: "some content from Google Plus comes here" } var facebook ={ dock:"top", style:"background-color: #aaaa55;color:white;", title: "facebook", html: "some content from Facebook comes here" } var rootPanel= new Ext.TabPanel({ fullscreen: true, layout: 'fit', items: [twitter,plus,facebook] }); } });