title: Hide div until file selected
body: <p>I have an image upload form with the following element:</p>
  
  <pre><code>&lt;input type="file"&gt;
  </code></pre>
  
  <p>I need to hide a div and only show it when a file is selected.</p>
  
  <pre><code>$("#myDiv").hide();
  </code></pre>
  
  <p>Do I need to add an ID to the form element and do onchange check if it's !empty? Not sure. </p>