Capture UTM parameters in a form

Capture UTM parameters

<script type="text/javascript" charset="utf-8">
  // From // http://www.quirksmode.org/js/cookies.html
  function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
      var c = ca[i];
      while (c.charAt(0)==' ') c = c.substring(1,c.length);
      if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
  }

  // From http://stackoverflow.com/questions/1688657/how-do-i-extract-google-analytics-campaign-data-from-their-cookie-with-javascript
  function parseAnalyticsCookie() {
    var values = {};
    var cookie = readCookie("__utmz");
    if (cookie) {
      var z = cookie.split('.');
      if (z.length >= 4) {
        var y = z[4].split('|');
        for (i=0; i<y.length; i++) {
          var pair = y[i].split("=");
          values[pair[0]] = pair[1];
        }
      }
    }
    return values;
  }

  $(document).ready(function () {
    function addFormElem(paramValue, fieldName) {
      var $utmEl = $("<input type='hidden' name='" + fieldName + "' value='" + paramValue + "'>");
      if (paramValue != "") {
        $("form").first().prepend($utmEl);
      }
    }

    // Note: Only change the values after ":" if they are different for you
    // They are the same as you setup as tags in your email marketing provider
    var utmParams = {
      "utmcsr" : "USOURCE",
      "utmcmd" : "UMEDIUM",
      "utmccn" : "UCAMPAIGN",
      "utmcct" : "UCONTENT",
      "utmctr" : "UTERM"
    };

    function parseAndSetUTM() {
      for (var cookieName in parseAnalyticsCookie()) {
        addFormElem(parseAnalyticsCookie()[cookieName], utmParams[cookieName]);
      }
    }

    setTimeout(parseAndSetUTM, 500);
  });
</script>

Does this still works? Can't see __utmz cookie, while utm param supplied in url