function FensterOeffnen (Adresse) {
 xpos=(screen.width-660)/2;
 ypos=10//(screen.height-700)/2;
  MeinFenster = window.open(Adresse, "Zweitfenster", "width=660,height=700,left="+xpos+",top="+ypos+", dependent=yes, resizable=no, location=no, menubar=no, status=no, toolbar=no");
  MeinFenster.focus();
}