UIWebView Delegate functions:-
Objective-C Declerations
- (BOOL)webView:(UIWebView *)webView
shouldStartLoadWithRequest:(NSURLRequest *)request
navigationType:(UIWebViewNavigationType)navigationType;
- (void)webView:(UIWebView *)webView
didFailLoadWithError:(NSError *)error;
- (void)webViewDidFinishLoad:(UIWebView *)webView;
- (void)webViewDidStartLoad:(UIWebView *)webView;