function wld_getUrlVars()
{     var isReferral = 0;
      var qStringStartPos = window.location.href.indexOf('?') + 1;
      if (qStringStartPos > 0) 
      {
      		var qString = window.location.href.slice(qStringStartPos);
			var vars = [], hash;
			var hashes = qString.split('&');
			for(var i = 0; i < hashes.length; i++)
			{	
				hash = hashes[i].split('=');
				vars.push(hash[0]);
				vars[hash[0]] = hash[1];
				if (hash[0] == 'source' || hash[0] == 'utm_source' || hash[0] == 'wldid') isReferral = 1;
			}
	  }
      if (isReferral == 1) return qString; else return '';
}