self.webView.delegate = self ?

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    NSString *path = [[NSBundle mainBundle] pathForResource:@"info" ofType:@"html"];
    NSString *content = [NSString stringWithContentsOfFile:path encoding:NSASCIIStringEncoding error:nil];
    NSURL *baseURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] bundlePath]];

    [self.webView loadHTMLString:content baseURL:baseURL];

    self.webView.delegate = self;
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark Web View Delegate

- (void)webViewDidFinishLoad:(UIWebView *)webView {
    [self.webView stringByEvaluatingJavaScriptFromString:@"showAlert()"];
}