public function insertStocks()
 {
     $this->form_validation->set_rules('txtItemID', 'Item ID', 'trim|required');
     $this->form_validation->set_rules('txtItemName', 'Item Name', 'trim|required');
     $this->form_validation->set_rules('txtCategory', 'Category', 'trim|required');
     $this->form_validation->set_rules('txtPrice', 'Price', 'trim|required');
     if ($this->form_validation->run()) {
         $details = Stock_info_model::stocksDetails();
         if (Stock_info_model::create($details)) {
             Stocks_model::newStocks();
             $this->session->set_userdata('added', 1);
             Audit_trail_model::auditNewItem($details);
             redirect('ams/view_inventory');
         }
     }
 }