<script type="text/javascript">
    function readMeta(user, pass){
            $.ajax({
                    type: "GET",
                    url: "/cmx/cs/localhost-mdm-DS_UI1/Person?action=meta",
                    dataType: 'json',
                    async: false,
                    headers: {
                            "Authorization": "Basic " + btoa(user + ":" + pass)
                    },
                    success: function (data) {
                            alert('Data received! ' + data.object.label);
                    }
            });
    }
</script>