function SubscribeUser(firstname, lastname, email, element){

    var listUrl = "/integration/mailchimp.ashx?email=" + $("#" + email).val() + "&firstname=" + $("#" + firstname).val() + "&lastname=" + $("#" + lastname).val();

    $.ajax({
        url: listUrl,
        success: function (data, textStatus) {
            $("#" + element).html(data);
            $("#" + element).show();
        }
    });

    

    return false;
}