function call_php(div_id,url) {
	Ext.Ajax.request({
		 url: url ,
		 waitMsg:"nahrávám",
		 success: function(response, opts) {
			document.getElementById(div_id).innerHTML=response.responseText;
		 },
		 failure: function(response, opts) {
			Ext.MessageBox.show({
				title: 'nejde to!',
				msg: response.responseText,
				buttons: Ext.MessageBox.OK
	   		});     
		}
	});
}