{	
	var ref = document.referrer;
	var mask = document.domain;
	
	if (ref.substr(7,mask.length) != mask)
	{	
		if (window.XMLHttpRequest) 
			http_request = new XMLHttpRequest();
		else if (window.ActiveXObject) 
			http_request = new ActiveXObject("Microsoft.XMLHTTP");
		
		http_request.open('GET', 'http://www.qlock.com/tracker.php?id=site&ref='+ref, true);
		http_request.send(null);	
	}
}