Разделение значений карты - jquery

{
"421": {
	"name_1": "First name 1",
	"name_2": "Last name 1",
	"locality": "Locality 1"
	},
"866": {
	"name_1": "First name 2",
	"name_2": "Last name 2",
	"locality": "Locality 2"
	},
.....

}

<input type = "text" name = "customer" id = "customer" class = "form-control input-lg" autocomplete = "off" />
    <input type = "text" id = "id_customer" >
<div id = "locality" ></div>


<script>
    $(document).ready(function(){

        $('#customer').typeahead({
            source: function(query, result)
            {
                $.ajax({
                    url:"customer_json_inc.php",
                    method:"POST",
                    data:{query:query},
                    dataType:"json",
                    success:function(data)
                    {
                        result($.map(data, function(elem, index){
                            $('#id_customer').val(index);
                            console.info(index);
                            return elem.name_1;
                        }));
                    }
                })
            }
        });

    });
</script>