function getLevel($pid, $level = 0){
	global $db;
	$sql = "SELECT parent FROM " . PAGES_TABLE . " WHERE id = $pid";
	$parent_id = $db->getOne($sql);
	if ($parent_id == 0){
		return $level;
	} else {
		return getNavLevel($parent_id, $level+=1);
	}
}