$context['html_headers'] .= "\n" . '
        <script type="text/javascript">
        //<![CDATA[
            $(document).ready(function()
            {
                var menuId = "Test";
                var ajax_request = true;

                $.ajax({
                    url: smf_scripturl + "?ajax_request=menu_children",
                    type: "POST",
                    data: {id: menuId, request: ajax_request},
                    dataType: "json",
                    success: function(res_text)
                    {
                        alert (res_text);
                    }
                });
            });
        //]]>
        </script>
    ';