function fensteroeffnen () {
	var br = screen.width, he = screen.height, sollb = 810, sollh = 610;
	br=(br-sollb)/2;
	he=(he-sollh)/2;
	Fenster1 = window.open("seo-burg-cloaking.html", "kleinesfenster", "width="+sollb+",height="+sollh+",left="+br+",top="+he);
	Fenster1.focus();
	if (Fenster1) {
		return false;
	} else {
		return true;
	}
}