function datum() {
  var dayNames = new Array("Sonntag","Montag","Dienstag","Mittwoch","Donn.","Freitag","Samstag");
  
  var monthNames = new Array("Januar","Februar","März","April","Mai","Juni","Juli","August","Sept.","Oktober","Nov.","Dez.");
  var now = new Date();
    
  if (now.getMinutes() < 10) minut = "0" + now.getMinutes();
  else minut = now.getMinutes();
  document.write(dayNames[now.getDay()] + ", " + now.getDate() + ". " + monthNames[now.getMonth()] + " " + now.getFullYear() + "<BR>" + now.getHours() + ":" + minut);

}