function FensterOeffnen (Adresse) {
 xpos=(screen.width-1000)/2;
 ypos=0//(screen.height-800)/2;
  MeinFenster = window.open(Adresse, "Zweitfenster", "width=1000,height=830,left="+xpos+",top="+ypos+", dependent=no, resizable=no, location=no, menubar=no, status=no, toolbar=no");
  MeinFenster.focus();
}