<select id="mySelect">
<option value="1">Yes</option>
<option value="2">No</option>
</select>
<input type="button" id="demo" value = "Demo" />
<script type="text/javascript">
$("#demo").live("click", function () {
//Get selectedIndex of HTML SELECT based in it's ID
var selectedIndex = $("#mySelect").attr("selectedIndex");
alert(selectedIndex);
});
</script>