private void jButton3MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_jButton3MouseClicked
       if(DescField51.getText() != null)
       {
        readsettings.write((String)jComboBox1.getSelectedItem(), DescField51.getText() );
        JOptionPane.showMessageDialog(null, "Settings changed!", "Timetable Management Program", JOptionPane.INFORMATION_MESSAGE);
        login_area.open1 = 0;
        this.setVisible(false);
       }
    }//GEN-LAST:event_jButton3MouseClicked