function updatesession(url)
{
	var u = encodeURIComponent(window.location.href);
	var r =	encodeURIComponent(document.referrer);
	url = url + '&u=' + u + '&r=' + r;
	var req = null;
	if(window.XMLHttpRequest)
	{ 
		req = new XMLHttpRequest(); 
	}
	else if(window.ActiveXObject)
	{ 
		try
		{ 
			req = new ActiveXObject("Msxml2.XMLHTTP"); 
		} 
		catch(e)
		{ 
			try
			{ 
				req = new ActiveXObject("Microsoft.XMLHTTP"); 
			} 
			catch(e)
			{
			} 
		} 
	}
	if(req != null)
	{ 
		req.open("GET", url, true); 
		req.send(null); 
	}
}