public function updateProdukt()
 {
     if ($_SESSION['loggedin'] == true) {
         $validering = new ValidationClass();
         if (count($validering->validation()) == 0) {
             $this->modell->updateProdukt();
             $this->template = $this->twig->loadTemplate('UpdateForm.twig');
             $this->template->display(array());
         } else {
             $this->template = $this->twig->loadTemplate('ErrorPage.twig');
             $this->template->display(array('errormessages' => $validering->validation(), 'postatdata' => $_POST));
         }
     } else {
         $this->login();
     }
 }