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