function runClock(){ 
  theTime=setTimeout('runClock()',1000);

  d = new Date();
  hr = d.getHours();
  min = d.getMinutes();
  sec = d.getSeconds();

  if(min <= 9){min="0"+min}
  if(sec <= 9){sec="0"+sec}
  clock.innerHTML = "" + hr + ":" + min + ":" + sec + "";
}
runClock();