title: why doesn't hitting enter when a SELECT is focused submit the form?
body: <p>Consider the following HTML:</p>
  
  <pre><code>&lt;form action=""&gt;
      &lt;input /&gt;
      &lt;select&gt;
          &lt;option&gt;A&lt;/option&gt;
          &lt;option&gt;B&lt;/option&gt;
      &lt;/select&gt;
      &lt;input type="submit" /&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>If the focus is on the <code>input</code> (text box) and I hit enter, the form submits.</p>
  
  <p>But, if the focus is on the <code>select</code> (dropdown box) and I hit enter, nothing happens.</p>
  
  <p>I know I could figure out some JavaScript to override this, but I want to know why hitting enter doesn't just work?</p>
  
  <p>Is there something I would break by capturing the enter with JavaScript (maybe some native keyboard accessibility of the dropdown)?</p>