function zufallsbild(){

  var image = new Array();
  
  //Hier die (Zufalls)-Bilder eintragen.
  
  image[1] = 'bruecke.jpg';
  image[2] = 'lago.jpg';
  image[3] = 'pasta.jpg';
  image[4] = 'tulpen.jpg';
  image[5] = 'wein.jpg';
  
  var num = Math.random();
  var ran = Math.floor((image.length - 1) * num) + 1;
  
  return document.write('<img src="./fileadmin/templates/img/header/' + image[ran] + '" border="0" alt = "'+image[ran]+'" title = ""/>');
}