function popup(DATEI,WIDTH,HEIGHT) {
  top.name = "popup";
  var popupURL = DATEI;
  var popupWIDTH = WIDTH;
  var popupHEIGHT = HEIGHT;
  var popup = window.open(popupURL,"neuesFenster",'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,width=' + popupWIDTH + ',height=' + popupHEIGHT);
  if( navigator.appName.substring(0,8) == "Netscape" ) {
    popup.location = popupURL;
    popup.opener = self;
  }
}