public function autocompletedoctorAction()
 {
     $term = $this->_request->getParam('term');
     $doctorModel = new DoctorModel();
     $covenants = $doctorModel->fetchAll($doctorModel->getPersonByDoctor($term));
     $json = '[';
     $first = true;
     foreach ($covenants as $row) {
         if (!$first) {
             $json .= ',';
         } else {
             $first = false;
         }
         $json .= json_encode(array("id" => $row['cddoctor'], "value" => $row['nmperson']));
     }
     $json .= ']';
     echo $json;
 }