title: How to get the Index of select->option tag
body: <pre><code>&lt;select id="sel"&gt;
  &lt;option value="123" selected="selected"&gt;text1&lt;/option&gt;
  &lt;option value="44"&gt;text2&lt;/option&gt;
  &lt;option value="882"&gt;text3&lt;/option&gt;
  ...
  &lt;/select&gt;
  </code></pre>
  
  <p>How to get the index of selected option with jQuery?
  May be <code>.index(subject)</code>, but all possibilities tested, didn't work...</p>
  
  <p>P.S. Indexes: value="123" => 0, value="44" => 1, ...</p>
  
  <p>Thanx</p>