public function actperiodoAction()
 {
     if (!$this->getRequest()->isPost()) {
         return $this->_forward('actualizarperiodo');
     }
     $form = new Application_Form_FormActualizarPeriodo();
     if (!$form->isValid($_POST)) {
         // Falla la validaciĆ³n; Se vuelve a mostrar el formulario
         $this->view->formactperiodo = $form;
         //return $this->render('form');
     }
     $mysession = new Zend_Session_Namespace('sesion');
     $periodoacademico = new Application_Model_PeriodoAcademico();
     $result = $periodoacademico->registrarPeriodo();
     if ($result == true) {
         $grados = new Application_Model_Grado();
         if ($grados->registrarGrado()) {
             return $this->_redirect('/admin/nuevogrado');
         }
     } else {
         return $this->_redirect('/');
     }
 }