title: Javascript prompt doesn't work on Nokia Lumia Phones
body: <p>I have the following javascript code:</p>
  
  <pre><code>var author = prompt("Would you give us your name please?", "Anonymous");
  </code></pre>
  
  <p>But the prompt window is never showed. I'm planning to create custom popup for that, but is there any workaround to still use the native browser one.</p>
  
  <p>Actually both alerts below show <em>undefined</em></p>
  
  <pre><code>alert(typeof prompt);
  alert(typeof window.prompt);
  </code></pre>