function init(nummer, unummer)
  {
      if (parent.navigationFrameExists) {
		parent.menu = nummer;
		parent.untermenu = unummer;
		parent.frames['nav'].location.href="menu.html";
	}
	
  }
  
  function bversion()
  {
        var bV  = parseInt ( navigator.appVersion );
        var NS4 = (document.layers)                     ? true : false;
        var NS3 = (document.images)                     ? true : false;
        var IE4 = ((document.all) && ( bV >=4 ))        ? true : false;
        
        var MAC         = (navigator.userAgent.indexOf("Mac")           != -1)  ? true : false;
        var Opera       = (navigator.userAgent.indexOf("Opera")         != -1)  ? true : false;
        var IE5         = (navigator.userAgent.indexOf("MSIE 5.0")      != -1)  ? true : false;
        return (Opera);
  }

  function blink(nr)
  {
    if (parent.navigationFrameExists) parent.nav.aufleucht(nr);
  }
  function zurueck(nru)
  {
    if (parent.navigationFrameExists) parent.nav.ursprung(nru);
  }

 function bildw(bildnr, bildobj) 
 {
	window.document.images[bildnr-1].src = bildobj.src;
 }
  
 function popup(bname,w,h)
 {
         w = w + 30;
         h = h + 30;
         var text = "width=" + w + ",height=" + h + ",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,dependent=yes,copyhistory=no,screenX=50,screenY=50"; 
	 bild=window.open(bname,"Doppelsterne",text);
 }