title: How can I bind an event on a selectedIndex changed on <select> element?
body: <p>By using jQuery how do I attach an event on the following select element so that on index change it alerts "I have changed!"?</p>
  
  <pre><code>&lt;select id="selCars"&gt;
    &lt;option&gt;Volvo&lt;/option&gt;
    &lt;option&gt;Saab&lt;/option&gt;
    &lt;option&gt;Mercedes&lt;/option&gt;
    &lt;option&gt;Audi&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>