Kód:

<form name=time>
<input type=text name=tfield size=9 style="border: 1px black solid; background-color: orange; color: white; font-size: 15px; font-weight: bold;">
</form>
<script language="JavaScript"  type="text/javascript">
var rTimer;
var sds ;

TimeTick();

function TimeTick()
{
 sds =  new Date();
 document.time.tfield.value=" "+sds.getHours()+" : "+sds.getMinutes()+" : "+sds.getSeconds();
 if(rTimer)
  {
   clearTimeout(rTimer);
  }

 rTimer = setTimeout('TimeTick()', 1000);
}

</script>