js获取当前城市名

<script src=" http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=js"></script>
<script>
    var province = remote_ip_info.province;//获取当前城市的身份
    var country = remote_ip_info.country;//获取当前城市的国家
    var ipcity = remote_ip_info.city;//获取城市名称
    document.write(ipcity);
</script>