function delete_instance($bookings)
 {
     $itemid = $bookings->itemid;
     if (!delete_records('bookings_item', 'id', $itemid)) {
         $p = false;
     }
     if (!delete_records('bookings_item_property', 'itemid', $itemid)) {
         $p = false;
     }
     $p = parent::delete_instance($bookings) and $p;
     return $p;
 }
 function bookings_weekly($cmid = 0)
 {
     parent::bookings_base($cmid);
 }
 function bookings_yearly($cmid = 0)
 {
     parent::bookings_base($cmid);
 }
 function bookings_calendar($cmid = 0)
 {
     parent::bookings_base($cmid);
 }