function markbook_menu() {
	$items = array();
	if($may_cache) {
		$items[]=array(	'path'		=>	'markbook',
						'title'		=>	t('Markbook'),
						'callback'	=>	'markbook_page',
						'access'	=>	user_access('access markbook'),
						'type'		=>	MENU_CALLBACK);		//Take command of all /markbook URLs
	} else {
		$items[]=array(	'path'		=>	'markbook',
						'title'		=>	t('my markbook'),
						'callback'	=>	'markbook_page',
						'access'	=>	user_access('edit own markbook'),
						'type'		=> MENU_DYNAMIC_ITEM);		//display "my markbook" item
	}
	return $items;
}