title: jQuery: Change dropdown select when checkbox is checked/unchecked
body: <p>I have this form:</p>
  
  <pre><code>&lt;input type="checkbox" value="First" /&gt;First
  &lt;input type="checkbox" value="Second" /&gt;Second
  &lt;input type="checkbox" value="Third" /&gt;Third
  
  &lt;select name="first-drop"&gt;
      &lt;option value="---"&gt;---&lt;/option&gt;
      &lt;option value="Option1"&gt;Option1&lt;/option&gt;
      &lt;option value="Option2"&gt;Option2&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>​Is there a way (using JS/jQuery) I can change the value of <code>first-drop</code> to <code>---</code> whenever the <code>First</code> check box is unchecked? </p>