$(function () {
    $("input[id^='add-product-to-cart']").click(function(event) {

        var link    = $(event.target);
        var id      = link.attr('id').split('-').pop();

        event.preventDefault();
      
        $.post('/cart/add-to-cart', {product_id: id}, function (data) {
            link.replaceWith(data);

            $.post('/cart/preview', function (data) {
                if ($('#cart-preview').length == 0) {
                    $('<div class="best-selling" id="cart-preview"></div>').prependTo('#right-column');
                }
                $('#cart-preview').replaceWith(data);
            });
        });
    });
});