elseif (!preg_match("/[^a-zA-Z0-9\.\-\Ä\ä\Ö\ö\Ü\ü\ ]+$/s",$query) ) {
    $content['page_text'] = "Your query contains invalid characters. Use letters A-Z and numbers only.";
	$content['news_list'] = parse_template(load_template("main_page"), $page);
    }