$.ajax({
        type: "POST",
        url: '@Url.Action("ValiderRang")',
        data: '{Id: ' + JSON.stringify(id) + ',Rang: ' + rang + '}',
        dataType: "json",
        contentType: "application/json; charset=utf-8",
        success: function (response) {
            if (response == "success") {
                return true;
            }
            else {
                return false;
            }
        },

        error: function (XMLHttpRequest, textStatus, errorThrown) {
            return false;
        }
    });