var http;
function handleHttpResponse_UpdateLinkClick() 
{ 
	if(http.readyState == 4) 
	{	
      isWorking = false;
    	if (http.responseText.indexOf('invalid') == -1) {			
			var xmlDocument = http.responseXML;
		}
	}
}

function UpdateLinkClick(intEventID,intMemberID,email,website) 
{
  var url = "ajax/UpdateLinkClick_ajax.php?intEventID=" + intEventID + "&intMemberID=" + intMemberID+ "&email=" + email+ "&website=" + website;
  var isWorking = false;
  if (!isWorking)
  {
		isWorking = true;
		if (window.XMLHttpRequest)
		{
			http=new XMLHttpRequest();
			http.open("GET",url, true);
			http.onreadystatechange=handleHttpResponse_UpdateLinkClick;
			http.send(null);
		}
		else if (window.ActiveXObject)
		{
			http=new ActiveXObject("Microsoft.XMLHTTP");
			if(http)
			{
				http.open("GET",url, true);
				http.onreadystatechange=handleHttpResponse_UpdateLinkClick;
				http.send();
			}
		}
	}
}