function submitSearch() {
	var searchstring = '';
	if (document.searchbox.keywords.value == '') {
		searchstring = searchstring + '?keywords=+';
	} else {
		var keywords = document.searchbox.keywords.value;
		keywords = keywords.replace(' ', '+');
		searchstring = searchstring + '?keywords=' + keywords;
	}
	window.location = 'advanced-search-result.php' + searchstring;
}