$(document).ready(function () {
    $('#add_to_cart').removeAttr('onclick');

    $('#add_to_cart').click(function () {
        document.getElementById('loading_fade_div').style.display='block';
        document.getElementById('loading_div').style.display='block';
        $("#shop_cart_top").stop().animate({"opacity": "0.1"}, "slow");
        $.ajax({
            type: 'post',
            url: 'index.php?route=module/cart/callbacktop',
            dataType: 'html',
            data: $('#product :input'),
            success: function (html) {
                document.getElementById("shop_cart_top").innerHTML = html;
            },
            complete: function () {
                document.getElementById('loading_div').style.display='none';
                document.getElementById('loading_fade_div').style.display='none';
                $("#shop_cart_top").stop().animate({"opacity": "1"}, "slow");
            }
        });
    });
});