public function deleteAllAva()
 {
     $id = $this->avi_id;
     $allAvas = T_J_AVISABUSIF_AVA::FindAllByIdAvis($id);
     foreach ($allAvas as $ava) {
         $idAva = $ava->T_E_AVIS_AVI->avi_id;
         $st = db()->prepare("DELETE FROM T_J_AVISABUSIF_AVA WHERE avi_id=:avi");
         $st->bindParam(':avi', $idAva);
         $st->execute();
     }
     $avi = new T_E_AVIS_AVI($id);
     $avi->deleteAvi();
 }