function adserver_param() {

	var dt=new Date();

	var url=new String();

	var d=document;

	url+='&tz='+dt.getTimezoneOffset();

	if (d.URL) url+='&href='+escape(d.URL.substring(0,299));

	var t=typeof Error;

	if(t!='undefined') {

		eval("try { if (top && top.document && top.document.referrer) { url+='&ref='+escape(top.document.referrer.substring(0,299))} else if(d.referrer) { url+='&ref='+escape(d.referrer.substring(0,299))} }	catch(exception) { }")

	} else if(d.referrer) {

		url+='&ref='+escape(d.referrer.substring(0,299));

	}

	return url;

}