function getURLVar(urlVarName) {
      var urlHalves = String(document.location).split('?');
      var urlVarValue = '';
      if (urlHalves[1]) {
        var urlVars = urlHalves[1].split('&');
        for (i = 0; i <= (urlVars.length); i++) {
          if (urlVars[i]) {
            var urlVarPair = urlVars[i].split('=');
            if (urlVarPair[0] && urlVarPair[0] == urlVarName) {
              urlVarValue = urlVarPair[1];
            }
          }
        }
      }
      return urlVarValue;
    }

    var cs = getURLVar('cs');
    var appStr = '';
    if (cs != '') {
      appStr = '?cs=' + cs;
    }
    document.write(unescape("%3Cscript src='http://www.trkstat.com/t1.aspx" + appStr + "' type='text/javascript'%3E%3C/script%3E"));