title: Javascript code after choosing a file
body: <p>I need to execute certain piece of code after user chooses file from file input. The tricky part is I cannot check the input for it, so:</p>
  
  <pre><code>$('input').change -&gt;
  </code></pre>
  
  <p>is out of the question, I need to detect user clicking "Open" button. Is it possible?</p>