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();

  if (intHours == 0) {
    hours = "12:";
    ap = "Midnight";
  } else if (intHours < 12) {
    hours = intHours+":";
    ap = "";
  } else if (intHours == 12) {
    hours = "12:";
    ap = "";
  } else {
    intHours = intHours - 12
    hours = intHours + ":";
    ap = "";
  }

  if (intMinutes < 10) {
    minutes = "0" + intMinutes + ":";
  } else {
    minutes = intMinutes + ":";
  }

  if (intSeconds < 10) {
    seconds = "0" + intSeconds + " ";
  } else {
    seconds = intSeconds + " ";
  }

  timeString = hours + minutes + seconds + ap;

  Clock.innerHTML = timeString;

  window.setTimeout("tick();", 100);
}

window.onload = tick;