- 

// jQuery Datepicker - Map arrow keys

var doKeyDown = $.datepicker._doKeyDown

$.extend($.datepicker, {

    _doKeyDown: function(event) {

        if (event.which === $.ui.keyCode.LEFT ||

            event.which === $.ui.keyCode.RIGHT ||

            event.which === $.ui.keyCode.UP ||

            event.which === $.ui.keyCode.DOWN) {

            event.ctrlKey = true;

            doKeyDown(event);

        } else {

            doKeyDown(event);

        }

    }

});