var ref_http = document.referrer.substring(0, site_http_url.length);

var ref_https = document.referrer.substring(0, site_https_url.length);

if((ref_http != site_http_url) && (ref_https != site_https_url) && (document.referrer != "")){

	var ln = document.location.toString();

	document.write('<img style="width:0px;height:0px;" width="0" height="0" src="' + document.location + (ln.indexOf('?')>=0?"":"?") + '&referrer=' + escape(document.referrer) + '">');

}