Find SelectedIndex With JavaScript

Source

JavaScript

<SCRIPT language=JavaScript type=text/javascript>
<!--
function ShowSelectedIndex(SelIdx) {
  alert('SelectedIndex for ' + SelIdx + ' is: ' + 
    document.getElementById(SelIdx).SelectedIndex); }
-->
<SCRIPT>

HTML

<form>
  <select id="series" name="series" onchange="ShowSelectedIndex('series')">
    <option value="l"> Nextel Cup             </option>
    <option value="2"> Busch Series           </option>
    <option value="3"> Craftsman Truck Series </option>
  </select>
</form>