public void actionPerformed(ActionEvent e) {
   MainMenu M = new MainMenu();
   Object source = e.getSource();
   EmployeeNewReservation o = new EmployeeNewReservation();
   EmployeeCheckRoom c = new EmployeeCheckRoom();
   EmployeeCheckOut b = new EmployeeCheckOut();
   if (source == order) {
     o.setEmployeeNewReservation();
     dispose();
   }
   if (source == exit) {
     M.setLoginPage();
     dispose();
   }
   if (source == check) {
     c.setEmployeeCheckRoom();
     dispose();
   }
   if (source == bill) {
     b.setEmployeeCheckOut();
     dispose();
   }
 }