function popUp1() {
  myPic = open("route_t_liege.html", "displayWindow", 
  "width=400,height=636,status=no,toolbar=no,menubar=no,scrollbars=no,resizable=no");
   }
   
 function popUp2() {
  myPic = open("route_t_aachen.html", "displayWindow", 
  "width=508,height=554,status=no,toolbar=no,menubar=no,scrollbars=no,resizable=no");
   }
   
  function maaspostartikel() {
  myPic = open("artikel_1.html", "displayWindow", 
  "width=700,height=551,status=no,toolbar=no,menubar=no,scrollbars=no,resizable=no");
   }