<!-- POPUP -->
 
  <!--
   function popup(breite, hoehe, ziel){
    var _popwidth = breite;
    var _popheight = hoehe;
    _xpos = (screen.width - _popwidth) / 2;
    _ypos = (screen.height - _popheight) / 2;
    var _eigenschaften = "width=" + _popwidth + ",height=" + _popheight + ", menubar=no, left=" + _xpos  + ",top=" + _ypos + ", resizable=yes, scrollbars=yes";
    _popup = window.open(ziel,"popup",_eigenschaften);
    _popup.focus();
   }
   
<!-- ENDE POPUP -->