Ext4: dockedItems example

stackoverflow question: http://stackoverflow.com/questions/7576256/need-example-extjs4-app-with-dockeditems

HTML

<link rel="stylesheet" href="/js/lib/ext-4.0.2a/resources/css/ext-all.css">

JavaScript

Ext.create('Ext.panel.Panel', {
        renderTo: Ext.getBody(),
        layout: 'auto',
        dockedItems: [{
            dock: 'top',
            xtype: 'toolbar',
            items: [{
                text: 'Docked to the top'
            }]
        }],
        items: [
            
        ]
    });