function FlexFenster(XWERT, YWERT, Thema, bars)
  {
   MeinFenster =
   window.open(Thema, "Zweitfenster", "width=" + XWERT + ",height=" + YWERT + ",left=10,top=10,"+bars+", menubar=no, resizeable=true");
   MeinFenster.focus();
  }