function openAnfahrt() {
	height = 500;
	width = 700;
	posX = screen.availWidth / 2 - width / 2;
	posY = screen.availHeight / 2 - height / 2;
	wnd = window.open("/pages/wegbeschreibung.php", "Webgeschreibung", "width=" + width + ",height=" + height + ",scrollbars=yes,left=" + posX + ",top=" + posY);
	wnd.focus();
}