title: Change event on <select>
body: <p>With Mootools, if I attach a change event listener on a <code>&lt;select&gt;</code> how do I access the option that was selected.  I would like the actual element and not just the value.</p>
  
  <pre><code>$('select').addEvent('change',function(event) {
      //??
  });
  </code></pre>