function delete_cookies() {
	document.cookie = "search_id=; path=/; expires=Mon, 17-May-2004 13:03:45 GMT";
	document.cookie = "keyword_combined=; path=/; expires=Mon, 17-May-2004 13:03:45 GMT";
	document.cookie = "keyword_not_english=; path=/; expires=Mon, 17-May-2004 13:03:45 GMT";
	document.cookie = "keyword_exact_english=; path=/; expires=Mon, 17-May-2004 13:03:45 GMT";
	document.cookie = "keyword_and_english=; path=/; expires=Mon, 17-May-2004 13:03:45 GMT";

	document.cookie = "keyword_or_english=; path=/; expires=Mon, 17-May-2004 13:03:45 GMT";
	document.cookie = "keyword_photographer=; path=/; expires=Mon, 17-May-2004 13:03:45 GMT";
	document.cookie = "keyword_number=; path=/; expires=Mon, 17-May-2004 13:03:45 GMT";
	document.cookie = "keyword_not=; path=/; expires=Mon, 17-May-2004 13:03:45 GMT";
	document.cookie = "keyword_exact=; path=/; expires=Mon, 17-May-2004 13:03:45 GMT";
	document.cookie = "keyword_and=; path=/; expires=Mon, 17-May-2004 13:03:45 GMT";

	document.cookie = "keyword_or=; path=/; expires=Mon, 17-May-2004 13:03:45 GMT";
}