function checkNN4() {
	if (navigator.userAgent.indexOf('Mozilla/4') != -1 && navigator.userAgent.indexOf('.NET CLR') != -1) {
		return false;
	}
	if (navigator.userAgent.indexOf('Mozilla/4.0') == -1) return false;
	if (navigator.userAgent.indexOf('MSIE') != -1) return false;
	if (navigator.userAgent.indexOf('Opera') != -1) return false;
	return true;
	
}

if (checkNN4()) {
	location.href="nc4.php";
}