<script>
  var xmlHttp, srvTime, thisDay;
  function getSrvTime() {
    try {
      xmlHttp = new XMLHttpRequest();
    }
    catch (err1) {
      try {
        xmlHttp = new ActiveXObject('Msxml2.XMLHTTP');
      }
      catch (err2) {
        try {
          xmlHttp = new ActiveXObject('Microsoft.XMLHTTP');
        }
        catch (eerr3) {
          // Browser didn't support ajax so use client time
          return new Date();
        }
      }
    }
    xmlHttp.open('HEAD', window.location.href.toString(), false);
    xmlHttp.setRequestHeader("Content-Type", "text/html");
    xmlHttp.send('');
    return xmlHttp.getResponseHeader("Date");
  }

  function updateSchedule() {
    var now = new Date(srvTime());
    var currentDay = now.getDay();

    if (currentDay !== thisDay) {
      // the day has changed so update div using jQuery
      jQuery("#schedule").load(location.href + " #schedule");

      // set thisDay to the currentDay (this means the function will only update once a day)
      thisDay = currentDay;
    }
  }

  (function($, window){
    $(function(){
      // get server time on init
      var now = new Date(getSrvTime());

      // set thisDay to the current day
      thisDay = now.getDay();

      // set the interval for polling (every 30 seconds
      setInterval(function() {
        updateSchedule();
      }, 30000);
    });
  })(jQuery, window);
</script>