Just paste the following script into the ... of your page. There are no other set-ups needed.
<script language="JavaScript">
<!--
// ==========================
// (C) 2000 by CodeLifter.com
// http://www.codelifter.com
// Free for all users, but leave in this header
function doTheClock() {
window.setTimeout( "doTheClock()", 1000 );
t = new Date();
if(document.all || document.getElementById){
document.title = t.toString();
}else{
self.status = t.toString();
}
}
doTheClock()
//-->
</script>