function updateTime(){
  var date = new Date()
  var hours = date.getHours()
  var minutes = date.getMinutes()
  var seconds = date.getSeconds()

  var old_hours = hours;
  if (hours > 12) {
    hours = hours - 12
  } else if (hours == 0) {
    hours = 12
  }

  if (minutes < 10) {
    minutes = "0" + minutes
  }

  var t_str = hours + ":" + minutes;
  if (old_hours > 11) {
    t_str += " pm";
  } else {
    t_str += " am";
  }

  document.getElementById('time').innerHTML = t_str;
}
setInterval(updateTime, 1);