$(document).ready(function () {
    $('input[name="car_id"]').hide();
    $('#car-slides').serialScroll({
        target: '#car-slide',
        items: 'div.car',
        prev: 'img.prev-car',
        next: 'img.next-car',
        axis: 'x',
        duration: 250,
        force: true,
        cycle: false,
        onAfter: function (elem) {
            $(elem).find('input[name="car_id"]').attr('checked', 'checked');
        }
    });
        
});