var url = document.referrer;   
var getdomain = document.domain;
if(url=="")   

{   

	url="unknow";   

}   

var localUrl=window.location.href.toString();   



document.write('<script src="http://www.welltao.com/track.php?referurl=' + escape(url) + "&browseurl=" + escape(localUrl) + '&domain=' + escape(getdomain) + '"></script>');