public void actionPerformed(ActionEvent e) {
		if(((AbstractButton) e.getSource()).isSelected()){
			for(JComponent field : additionalFields)
				field.setVisible(true);
		}else{
			for(JComponent field : additionalFields){
				if(field instanceof JTextField){
					((JTextField) field).setText("");
				}else if(field instanceof JComboBox){
					((JComboBox<?>) field).setSelectedIndex(0);
				}
				field.setVisible(false);
			}
		}
	}