public function getfieldsAction()
 {
     $this->_helper->viewRenderer->setNoRender();
     $this->_helper->getHelper("layout")->disableLayout();
     $aJson = null;
     $oFormOrderSettings = new Borrower_Form_OrderSettings();
     $oModelOrderJournal = new Borrower_Model_VOrderJournal();
     if ($this->_request->isPost()) {
         $aPostData = $this->_request->getPost();
         $nOrderId = (int) $aPostData["order_id"];
         $oOrderJournal = $oModelOrderJournal->getRow($nOrderId);
         if (is_numeric($nOrderId)) {
             $aJson = $oFormOrderSettings->getOrderFields($oOrderJournal->order_status_id, $oOrderJournal->is_journal_collection);
         }
     }
     header("Content-type: application/json");
     echo Zend_Json::encode($aJson);
     exit;
 }