var tick;
function stop() {
clearTimeout(tick);
}
function usnotime(){
var ut=new Date();
var h,m,s;
var time='';
h=ut.getHours();
m=ut.getMinutes();
s=ut.getSeconds();
if(s<=9) s='0'+s;
if(m<=9) m='0'+m;
if(h<=9) h='0'+h;
time+=h+':'+m+':'+s;
document.rclock.rtime.value=time;
tick=setTimeout('usnotime()',1000);
}