public function delSkripsi($id = null)
 {
     if (Session::get('role') != 2) {
         $this->viewSkripsi();
         exit;
     }
     if ($id != "") {
         $elem = new ElemenBeasiswa($this->registry);
         //echo $id;
         $elem->delete_elem($id);
         $penerima_elemen = new PenerimaElemenBeasiswa();
         $penerima_elemen->delete($id);
         ClassLog::write_log("elemen beasiswa", "hapus uang penelitian", "kd_el." . $id);
         $url = URL . 'elemenBeasiswa/viewSkripsi';
         echo '<script> alert("Data berhasil dihapus") </script>';
         echo '<script language="JavaScript"> window.location.href ="' . $url . '" </script>';
     }
 }