var fenster;
fenster=null;

function FensterOeffnen(datei,name,breite,hoehe,menu)
{
//var breite = breite;
//var hoehe = hoehe;
var Optionen;
var fenster;
var left =(window.outerWidth-breite)/2;
var top =(window.outerHeight-hoehe)/2;
var menubar = (menu == null)? 0 : 1;
Optionen = "toolbar=0,location=0,directories=0,status=0,menubar="+menubar+",scrollbars=1,resizable=0,height="+hoehe+",width="+breite+",left="+left+",top="+top+"";
fenster = window.open(datei,name,Optionen);
fenster.focus();
}

function FensterSchliessen(name)
{
if (fenster != null)
if (!fenster.closed)
fenster[name].close();
}