// ** source referer settings starts here **
// check for cookie
var querystring = location.search.substring(1);
var referSource = getCookie("source");
var referURL = document.referrer;
// if the cookie wasn't found, create it set to source
if (!referSource || querystring) {
  source = querystring; // the value for the new cookie
  setCookie("source", source);
  setCookie("sourceRefer", referURL);
}
// ** source referer settings ends here **