function NeuFenster(source,breite,hoehe,titel)
{
var PicWin = window.open(source, "Zweitfenster", "width="+breite+",height="+hoehe+",hotkeys=no,locationbar=no,menubar=no,status=no,resizable=no");
    PicWin.moveTo((screen.availWidth - breite) / 2,(screen.availHeight - hoehe) / 2);
    PicWin.Title=titel; 
    PicWin.Name=titel;
    PicWin.document.title=titel;
    PicWin.focus();
}

// Netscape oder Microsoft - das ist hier die Frage
var NS  = navigator.appName == "Netscape";
var IE  = navigator.appName == "Microsoft Internet Explorer" || 
          navigator.appName == "";

// Version 5 (resp. 6 für Netscape)
var BB6 = navigator.appVersion.substring(0,1) >= "5";
var BB5 = navigator.appVersion.substring(22,23) >= "5";
var NS6 = BB6 && NS;
var IE5 = BB5 && IE;

// Version 4
var BB4 = navigator.appVersion.substring(0,1) == "4";
var NS4 = BB4 && NS;
var IE4 = BB4 && IE;

// Maximal Version 3
var BB3 = navigator.appVersion.substring(0,1) <= "3";
var NS3 = BB3 && NS;
var IE3 = BB3 && IE;