UIWebView - stringByEvaluatingJavaScriptFromString - not changing text box value
<p>Why doesn't this code work?  It shows the Google screen but it doesn't change the text box value.  I confirmed that the JS does work by running it in Safari, and this code seems to work otherwise since running alert('hi') does work.</p>

<pre><code>NSURL *web_url = [NSURL URLWithString:@"http://www.google.com"];
NSURLRequest *web_request = [NSURLRequest requestWithURL:web_url];
[web_screen loadRequest:web_request];
NSString *js_result = [web_screen stringByEvaluatingJavaScriptFromString:@"document.getElementsByTagName('input')[1].value='test';"];
</code></pre>
