public static function act()
	{
		$args = func_get_args();
		$hookname = array_shift($args);
		if ( ! isset( self::$hooks['action'][$hookname] ) ) {
			return false;
		}
		foreach ( self::$hooks['action'][$hookname] as $priority ) {
			foreach ( $priority as $action ) {
				// $action is an array of object reference
				// and method name
				call_user_func_array( $action, $args );
			}
		}
	}