title: document.getElementById().innerHTML for select tag doesn't work in IE
body: <p>i have the following simple script</p>
  
  <hr>
  
  <pre><code>&lt;input type="button" onclick="document.getElementById('a').innerHTML = '&lt;option&gt;something&lt;/option&gt;';"/&gt;    
   &lt;select id="a" style="width: 150px;"&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>but it doesn't work in IE.
  could you tell me why?
  thanks</p>