title: jquery Event Listener on DropDown Open
body: <p>Having this simple dropdown menu:</p>
  
  <pre><code>&lt;select id="foo"&gt;
     &lt;option&gt;bar&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>And an jQuery listener initialization like this:</p>
  
  <pre><code>$("#foo").on("click", function() {
      console.log("stuff");
  });
  </code></pre>
  
  <p>The event is only fired when the user closes the drop down, either by selecting an option or by clicking outside of the box. Is there any way to get the event, when he opens the box? </p>