You can fire chnage event by these methods:
First
$('#selectid').change(function () {
alert('This works');
});
Second
$(document).on('change', '#selectid', function() {
alert('This Works');
});
Third
$(document.body).on('change','#selectid',function(){
alert('This Works');
});
If this methods not working, check your jQuery working or not:
$(document).ready(function($) {
alert('Jquery Working');
});