function tick() {
  var hours, minutes, seconds, ap;
  var intHours, intMinutes, intSeconds;
  var today;
  today = new Date();
  intHours = today.getHours();
  intMinutes = today.getMinutes();
  intSeconds = today.getSeconds();
  hours = intHours+":";
  if (intMinutes < 10) {
     minutes = "0"+intMinutes+":";
  } else {
     minutes = intMinutes+":";
  }
  if (intSeconds < 10) {
     seconds = "0"+intSeconds+" ";
  } else {
     seconds = intSeconds+" ";
  } 
  timeString = hours+minutes+seconds;
  Clock.innerHTML = timeString;
  window.setTimeout("tick();", 1000);
}
window.onload = tick;