public void saveClicked()
{
	String query = "UPDATE OSOBA SET ";
	query += "IMIE = '" + tfImie.getText() + "',";
	query += "NAZWISKO = '" + tfNazwisko.getText() + "',";
	String temp = tfAdres.getText();
	if ("<brak danych>".equals(temp) || "".equals(temp)){
		query += "ADRES = null, ";
	}
	else{
		query += "ADRES = '" + tfAdres.getText() + "', ";
	}
	temp = tfTelefon.getText();
	if ("<brak danych>".equals(temp) || "".equals(temp)){
		query += "TELEFON = null, ";
	}
	else{
		query += "TELEFON = '" + tfTelefon.getText() + "', ";
	}
	temp = tfEmail.getText();
	if ("<brak danych>".equals(temp) || "".equals(temp)){
		query += "null)";
	}
	else{
		query += "EMAIL = '" + tfEmail.getText() + "' ";
	}
	query += "WHERE id = " + Integer.toString(lto.id);
	try{
		stm.executeUpdate(query);
	}
	catch(SQLException e){
		showMessage("Error: save", e.toString());
		return;
	}
	refresh();
}

