window.onload = function () {
  // Month Day, Year Hour:Minute:Second, id-of-element-container
  countUpFromTime(1726606005692, 'countup1'); // ****** Change this line!
};
function countUpFromTime(countFrom, id) {
  countFrom = new Date(countFrom).getTime();
  var now = new Date(),
    countFrom = new Date(countFrom),
    timeDifference = (now - countFrom);
  var secondsInADay = 60 * 60 * 1000 * 24,
    secondsInAHour = 60 * 60 * 1000;
  days = Math.floor(timeDifference / (secondsInADay) * 1);
  years = Math.floor(days / 365);
  if (years > 1) { days = days - (years * 365) }
  hours = Math.floor((timeDifference % (secondsInADay)) / (secondsInAHour) * 1);
  mins = Math.floor(((timeDifference % (secondsInADay)) % (secondsInAHour)) / (60 * 1000) * 1);
  secs = Math.floor((((timeDifference % (secondsInADay)) % (secondsInAHour)) % (60 * 1000)) / 1000 * 1);
  var idEl = document.getElementById(id);
  idEl.style.removeProperty("visibility");
  idEl.getElementsByClassName('days')[0].innerHTML = days;
  idEl.getElementsByClassName('hours')[0].innerHTML = hours;
  idEl.getElementsByClassName('minutes')[0].innerHTML = mins;
  idEl.getElementsByClassName('seconds')[0].innerHTML = secs;
  clearTimeout(countUpFromTime.interval);
  countUpFromTime.interval = setTimeout(function () { countUpFromTime(countFrom, id); }, 1000);
}