userAgent = navigator.userAgent.toLowerCase();

dom = (document.documentElement && userAgent.indexOf("opera") < 0 && userAgent.indexOf("safari") < 0);
ope = (userAgent.indexOf("opera") > -1 && userAgent.indexOf("ppc") < 0 && userAgent.indexOf("mac_powerpc") < 0);
mi4 = (document.all && userAgent.indexOf("msie") > -1 && userAgent.indexOf("4.") > -1 && userAgent.indexOf("opera") < 0 && userAgent.indexOf("6.") < 0);
ns4 = (userAgent.indexOf("4.") > -1 && userAgent.indexOf("icab") < 0 && (userAgent.indexOf(" i") > -1 || userAgent.indexOf(" u") > -1));
saf = (userAgent.indexOf("safari") > -1);

	//if (mi4) { location.href = "bosi4.html"; }
	//if (ns4) { location.href = "bosn4.html"; }
	//if (saf) { location.href = "boss.html"; }
	if (dom || ope || saf) { location.href = "willkommen.html"; }