Jquery-get dropdown id

Get the dropdown's selected id by using jquery.

HTML

Example 1:
<select id="example1" class='multiselect dropdown-toggle btn btn-default' data-toggle="dropdown" >
    <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="example1" class='multiselect dropdown-toggle btn btn-default' data-toggle="dropdown" >
    <option id="1">one</option>
    <option id="2">two</option>
    <option id="3">three</option>
    <option id="4">four</option>
</select>

JavaScript

$(".multiselect",0).on('change', function () {
    alert('sssssssssssssejhbfjefjgfhjfjhhgjkhkj');
});


$("[id=example1]:eq(1)").on('change', function () {
    //alert($(this).val());
    alert('ehfp[oefpo]');
});