function showtime() {
  var now = new Date();
  var hours = now.getHours();
  var minutes = now.getMinutes();
  var seconds = now.getSeconds();
  var timeValue = ((hours < 10) ? '0' : '') + hours;
  timeValue  += ((minutes < 10) ? ":0" : ":") + minutes;
  timeValue  += ((seconds < 10) ? ":0" : ":") + seconds;
  document.getElementById('clock').innerHTML = timeValue;
  timerID = setTimeout("showtime()", 1000);
  timerRunning = true;
}

function openPhotoWindow(querystring) {
  openWindow('/foto-popup/' + querystring, 'photoWindow', 'width=640, height=480');
}

function openWindow(page, winName, features) {
  popup = window.open(page, winName, features);
  popup.focus();
}