title: stringByEvaluatingJavaScriptFromString
body: <p>i write app and i need load same HTML page. Than need take element.</p>
  
  <blockquote>
    <p>getElementById(\"orderData\")</p>
  </blockquote>
  
  <pre><code>let webView = UIWebView()       
  let localfilePath = NSBundle.mainBundle().URLForResource("PrintPage", withExtension: "html") 
  
  let myRequest = NSURLRequest(URL: localfilePath!)    
  webView.loadRequest(myRequest)  
  
  print(webView.stringByEvaluatingJavaScriptFromString("document"))
  </code></pre>
  
  <p>But just print document give me <strong>Optional""</strong>. 
  getElementById(\"orderData\") too write <strong>Optional""</strong>. </p>
  
  <p>P.S. I can see this page, no problem with loading.</p>
  
  <p>------ Update
  P.S.S Deal not in OptionValue =) Deal with empty string when i try use JavaScript</p>