Reloj "bomba" 24h - Puntoinfinito

<!------ Puntoinfinito ------>
<div id="clock1">05<span class="small">Hrs </span>34<span class="small">Min </span>20<span class="small">Sec </span>


      <script language="JavaScript">
/* Update clock for 24hr to start at 06/19/2012 1600 EET - 1400 GMT */
  StartCountDown("clock1","06/19/2012 01:00 PM -2400")
  /*
    Author:     Puntoinfinito (www.infiniter.tk)
  */

  function StartCountDown(myDiv,myTargetDate)
  {
    var dthen   = new Date(myTargetDate);
    var dnow    = new Date();
    ddiff       = new Date(dthen-dnow);
    gsecs       = Math.floor(ddiff.valueOf()/1000);
    CountBack(myDiv,gsecs);
  }

  function Calcage(secs, num1, num2)
  {
    s = ((Math.floor(secs/num1))%num2).toString();
    if (s.length < 2)
    {
      s = "0" + s;
    }
    return (s);
  }

  function CountBack(myDiv, secs)
  {
    var DisplayStr;
    var DisplayFormat = "%%H%%" + "<span class='small'>Hrs </span>" + "%%M%%"  + "<span class='small'>Min </span>" + "%%S%%" + "<span class='small'>Sec </span>";
    DisplayStr = DisplayFormat.replace(/%%D%%/g,    Calcage(secs,86400,100000));
    DisplayStr = DisplayStr.replace(/%%H%%/g,       Calcage(secs,3600,100));
    DisplayStr = DisplayStr.replace(/%%M%%/g,       Calcage(secs,60,60));
    DisplayStr = DisplayStr.replace(/%%S%%/g,       Calcage(secs,1,60));
    if(secs > 0)
    {
      document.getElementById(myDiv).innerHTML = DisplayStr;
      setTimeout("CountBack('" + myDiv + "'," + (secs-1) + ");", 990);
    }
    else
    {
      document.getElementById(myDiv).innerHTML = "BUUUM!";
    }
  }

</script>