function wechsel(datei,nr)
{
	document.images[nr].src = "images/"+datei+".gif";
}
function neu(seite,breite,hoehe)
{
	var screenwidth = (screen.width/2)-(breite/2);
	var screenheight = (screen.height/2)-(hoehe/2);
	var attributes = "width="+ breite +",height="+ hoehe +",left="+ screenwidth +",top="+ screenheight +",screenX="+ screenheight +",screenY="+ screenwidth +",dependent=yes,location=no,menubar=no,resizable=yes,scrollbars=yes,status=no,toolbar=no";
    var neu = window.open(seite,"neu",attributes);
}