-$sql = get_sql_for_work_orders($outstanding_only, $_POST['SelectedStockItem'], $_POST['StockLocation'],
- $_POST['OrderNumber'], check_value('OverdueOnly'));
+$sql = get_sql_for_work_orders($outstanding_only, get_post('SelectedStockItem'), get_post('StockLocation'), get_post('OrderNumber'),
+ check_value('OverdueOnly'));