Jquery datepicker format date not working

Question

Here is my code:

$(function () {
    $(\"#datepicker\").datepicker({ dateFormat: \'DD-MM-YY\' });
});

And the datetime picker is shown, but

Answer 1

Full example:

In jsp:

In script:

function datepicker() {

  $("#datepicker").datepicker({
    showButtonPanel: true,
    dateFormat: 'yy-mm-dd',
    onSelect: function() {
        var dateObject = $('#datepicker').datepicker().val();
        alert(dateObject);
    }
   }
  );
}