rem: transport.open('GET', def.url, true); 
add: transport.open('GET', def.url+'?anticache='+Math.random(), true); 
context: 	ajax : function(def) {		transport = false;		if(window.XMLHttpRequest)		{			transport = new XMLHttpRequest();			if(transport.overrideMimeType)			{				transport.overrideMimeType('text/xml');			}		}		else if(window.ActiveXObject)		{			try			{				transport = new ActiveXObject("Msxml2.XMLHTTP");			} catch (e) {				try				{					transport = new ActiveXObject("Microsoft.XMLHTTP");				} catch (e) {}			}		}		if(!transport)		{			alert('Error: could not create XMLHTTP object.');			return false;		}			transport.onreadystatechange = function() { wupb.update(transport, def); };		transport.open('GET', def.url, true);		transport.send(null);	},
meta: 1204	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1204/bdde9e1c2dd3704dc0750155b32da646ca87f015/progressbar.js/clean/wicket-extensions/src/java/wicket/extensions/ajax/markup/html/form/upload/progressbar.js