I've figured out how to hide the navigation bar and then show the toolbar it has built-in but the toolbar appears at the bottom os the screen how can i position the toolbar on the top of the scren?

here's some of my code

        UIBarButtonItem *yesterday = [[UIBarButtonItem alloc]initWithTitle:@"Yesterday" 
                                                                     style:UIBarButtonItemStyleBordered target:self action:@selector(yesterday:)];
    UIBarButtonItem *today = [[UIBarButtonItem alloc]initWithTitle:@"Today" 
                                                            style:UIBarButtonItemStyleDone target:self action:@selector(today:)];
    UIBarButtonItem *tomorrow = [[UIBarButtonItem alloc]initWithTitle:@"Tomorrow" 
                                                            style:UIBarButtonItemStyleBordered target:self action:@selector(tomorrow:)];
    UIBarButtonItem *month = [[UIBarButtonItem alloc]initWithTitle:@"Month" 
                                                            style:UIBarButtonItemStyleBordered target:self action:@selector(month:)];
    NSArray *items = [NSArray arrayWithObjects:yesterday,today,tomorrow,month, nil];

    [yesterday release];
    [today release];
    [tomorrow release];
    [month release];

    [self setToolbarItems:items];


        [[self navigationController] setNavigationBarHidden:YES animated:NO];
    [[self navigationController] setToolbarHidden:NO animated:YES];

Thanks.