public function ajaxCheckLogbookNameAction()
 {
     $this->_helper->layout->disableLayout();
     $this->_helper->viewRenderer->setNoRender(TRUE);
     $name = $this->_request->name;
     $fname = $this->_request->fname;
     $do = $this->_request->do;
     $log_book = new Model_LogBook();
     $log_book->form_values = array('name' => $name, 'fname' => $fname, 'do' => $do);
     return $log_book->checkLogbookName();
 }