HTML/Javascript Countdown timer

countdown.html

<script type="text/javascript">// <![CDATA[
/*  Javascript Countdown Timer
 *  Will Bradley (www.willbradley.name) Dec. 2009
 *  Code released publicly without any warranty or license.
 */
  function showtime() {
    dateString = new Date().toUTCString();
    now = Date.parse(dateString);

    xmasDateString = new Date(1261724400000).toUTCString();  // The long number is December 25, 2009 in Javascript's .getTime() format. You can put almost any value in here, including plain english dates.
    xmasDate = Date.parse(xmasDateString);

    dd = xmasDate - now;
    dday=Math.floor(dd/(60*60*1000*24)*1);
    dhour=Math.floor((dd%(60*60*1000*24))/(60*60*1000)*1);
    dmin=Math.floor(((dd%(60*60*1000*24))%(60*60*1000))/(60*1000)*1);
    dsec=Math.floor((((dd%(60*60*1000*24))%(60*60*1000))%(60*1000))/1000*1);

    if(now > xmasDate)
    {
      // Put any "countdown done!" code here. I've got it reloading in order to pull new info via a coordinated PHP countdown, but you could put anything.
      window.location.reload();
      document.getElementById("secs").innerHTML = "Reload the page for your gift!";
    }
    else{
      document.getElementById("secs").innerHTML =
        dday + "<em>days</em>" +
        dhour + "<em>hours</em>" +
        dmin + "<em>minutes</em>" +
        dsec + "<em>seconds</em>";
      timerID = setTimeout("showtime()",1000);
    }

  }
// ]]></script>
<style type="text/css"><!--
  body { background-color: black; color: white; text-align: center;
    font-family: Lucida Sans Unicode, Lucida Grande, sans-serif; font-size: 12px;
  }
  h1 { color: #ee0000; font-weight: bold; margin-top: 150px; font-size: 4em; text-transform: uppercase; }
  h1 em { color: white; font-style: normal; margin: 0 0.5em 0 0.25em; font-size: 0.4em; }
--></style>
<h1 id="secs"></h1>