EngineGP/template/js/sections/services/mc.js

$('#mc').ajaxForm({
    dataType: 'json',
    success: function (data) {
        $.each(data, function (i, val) {
            if (i == 'e')
                bootbox.dialog('<h3 class="red">Ошибка</h3>' + val,
                    [{
                        "label": "Продолжить",
                    }]
                );

            if (i == 's')
                location.href = home + 'servers/id/' + data['id'];
        });

        loading(0);
    }
});

function change_data(data) {
    $.getJSON('services/section/mc/id/' + $('#unit').val() + '/tarif/' + $('#tarifs').val() + '/get/' + data, function (arr) {
        $.each(arr, function (id, val) {
            $('#' + id).html(val);
        });

        upd_price();
        promo();
    });
}

function upd_price() {
    $.getJSON('services/section/mc/id/' + $('#unit').val() + '/tarif/' + $('#tarifs').val() + '/slots/' + $('#slots').val() + '/time/' + $('#time').val() + '/ram/' + $('#ram').val() + '/get/price', function (arr) {
        $.each(arr, function (id, val) {
            $('#' + id).html(val);
        });

        promo();
    });
}

function promo() {
    if ($('#promo').val() == '') {
        $('#promo_tr').css('display', 'none');
        $('#sum_info').css('text-decoration', 'none');
        return false;
    }

    $.getJSON('services/section/mc/id/' + $('#unit').val() + '/tarif/' + $('#tarifs').val() + '/slots/' + $('#slots').val() + '/time/' + $('#time').val() + '/ram/' + $('#ram').val() + '/cod/' + $('#promo').val() + '/get/promo', function (arr) {
        $('#promo_tr').css('display', 'table-row');

        if (arr['e'] != undefined) {
            $('#promo_info').html(arr['e']);
            $('#sum_info').css('text-decoration', 'none');
        } else {
            if (arr['discount'] == 1) {
                $('#sum_info').css('text-decoration', 'line-through');
                $('#promo_info').html('Цена с учетом промо-кода: ' + arr['sum'] + ' ' + arr['cur']);
            } else {
                $('#sum_info').css('text-decoration', 'none');
                $('#promo_info').html('Подарочные дни: ' + arr['days']);
            }
        }
    });
}