Hide div until file selected
<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>
