Ext.onReady(function(){


	var mainwindow = new Ext.Panel({
	
		title: 'Main window',
		contentEl: 'mainwindow',
		id: 'mainwindow',
		items: 
		[
			{
				xtype: 'panel',
				applyTo: 'menupanel',
				id: 'menupanel',
				title: 'Navigation',
				items:
				[
					{
						xtype:'panel',
						title:'Les icones',
						applyTo:'menuicons',
						id: 'menuicons'
					}
				]
			}
		]
				

	});
	
	var handle = Ext.get('mainwindow');
	
	handle.on('click', function(e, t) { 
		

		alert (t.id);
	
	});

});