<script language="JavaScript"> var clockID = 0; function UpdateClock() { if(clockID) { clearTimeout(clockID); clockID = 0; } var tDate = new Date(); document.theClock.theTime.value = "" + tDate.getHours() + ":" + tDate.getMinutes() + ":" + tDate.getSeconds(); clockID = setTimeout("UpdateClock()", 1000); } function StartClock() { clockID = setTimeout("UpdateClock()", 500); } function KillClock() { if(clockID) { clearTimeout(clockID); clockID = 0; } }  </script> <body onload="StartClock()" onunload="KillClock()"> 