private void data_charges() {
   //        String date = lb_date_baptism.getText();
   int row = tbl_cust.getSelectedRow();
   if (row < 0) {
     return;
   }
   String num = tbl_cust.getModel().getValueAt(row, 1).toString();
   //        JOptionPane.showMessageDialog(null, num);
   loadData_charges(S2_customers.ret_charges(num));
   compute_charges();
 }