var URL = window.location.href;
var AdvertName = Advert_Name;
var UserID = User_ID;
var HTTP_REFERER = document.referrer;

var URL = "http://connectroom.com/tracking.asp?URL=" + URL + "&Affiliate_ID=" + AdvertName + "&HTTP_REFERER=" + HTTP_REFERER + "&UserID=" + UserID 
document.write('<iframe src =' +  URL  + ' width=0 height=0 frameborder=0></iframe>');