Demo - jquery-get-dropdown-list

Edit This Code :
<html>
<head>
<body>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
Example 1:
<select id="example1">
    <option value="1">one</option>
    <option value="2">two</option>
    <option value="3">three</option>
    <option value="4">four</option>
</select>Example 2 :
<select id="example2">
    <option id="1">one</option>
    <option id="2">two</option>
    <option id="3">three</option>
    <option id="4">four</option>
</select>

<script>
$(document).ready(function() {
$("#example1").on('change', function () {
    alert($(this).val());
});


$("#example2").on('change', function () {
    //alert($(this).val());
    alert($(this).find('option:selected').attr('id'));
});
});
</script>

</body>
</html>
Result :