Counter fra unix-time

var secondsLeft = <?php print($timestamp); ?> - Math.round(new Date().getTime() / 1000);
function countDown() {
  document.getElementById('counter').firstChild.nodeValue = secondsLeft--;
}
countInterval = setInterval(countDown, 1000);

var secondsLeft = <?php print($timestamp); ?> - Math.round(new Date().getTime() / 1000);
function countDown() {
  secondsLeft--;
  hoursLeft = (secondsLeft - secondsLeft % 3600) / 3600;
  minutesLeft = (secondsLeft - secondsLeft % 60 - hoursLeft * 3600) / 60;
  document.getElementById('counter').firstChild.nodeValue = 'Tilbage: ' + hoursLeft + ' ' + ((hoursLeft == 1)?'time':'timer') + ', ' + minutesLeft + ' min.';
}
countInterval = setInterval(countDown, 1000);