How To Display Current Time on Page using Javascript

Here is the JavaScript function which will get current time in Military format.

<script type="text/javascript">
    function startTime()
    {
    var today=new Date();
    var h=today.getHours();
    var m=today.getMinutes();
    var s=today.getSeconds();
    // add a zero in front of numbers<10
    m=checkTime(m);
    s=checkTime(s);
    document.getElementById('Showtime').innerHTML=h+":"+m+":"+s;
    t=setTimeout(function(){startTime()},500);
    }
    
    function checkTime(i)
    {
    if (i<10)
      {
      i="0" + i;
      }
    return i;
    }
    </script>