window.addEvent('domready', function() {
UpdateDateTime();
var intervalID = UpdateDateTime.periodical(60000);
});

var days = new  Array("Neděle", "Pondělí", "Úterý", "Středa", "Čtvrtek", "Pátek", "Sobota");

function UpdateDateTime() {
  var date = new Date();
  $('date-day').set('html', days[date.getDay()]+' '+date.getDate()+'.'+date.getMonth()+'.'+date.getFullYear());
  var minutes = date.getMinutes()+"";
  if (minutes.length == 1) minutes = '0'+minutes;
  $('date-hm').set('html', date.getHours()+':'+minutes);
}