function reset() {
	HTML_AJAX.replace('categories', '../ajax/project_search_categories.php?reset=1');
}

function expand() {
	HTML_AJAX.replace('categories', '../ajax/project_search_categories.php?expand=1');
}

function select($category) {
	HTML_AJAX.replace('categories', '../ajax/project_search_categories.php?cid=' + $category );
}