UIButton* infoButton = [UIButton buttonWithType:UIButtonTypeInfoLight];
    [infoButton addTarget:self action:@selector(infoButtonAction:) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem *modalButton = [[UIBarButtonItem alloc] initWithCustomView:infoButton];
    [infoButton release];
    [self.navigationItem setLeftBarButtonItem:modalButton animated:YES];
    [modalButton release];