jQuery获得客户端/浏览器的IP地址信息

通过http://ipinfo.io网站api获得ip地址的详细信息，实现网站中英文切换。可能还有更多的网站提供ip查询，不过个人觉得http://ipinfo.io比较简单、实用。

了解更多，请参考网站:http://ipinfo.io/developers

提供另外两种办法：

1. jsonip.com: is a free utility service that returns a client's IP address in a JSON object with support for JSONP, CORS, and direct requests. It serves millions of requests each day for websites, servers, mobile devices and more from all around the world.

All you need to do is to make a call to jsonip.com.
$(document).ready(function () {
    $.get('http://jsonip.com', function (res) {
        $('p').html('IP Address is: ' + res.ip);
    });
});

2. Smart-IP.net: Smart IP for today is one of the leading services providing to it's users all the required information about IP-addresses and everything related to them.
$(document).ready(function () {
    $.getJSON('http://smart-ip.net/geoip-json?callback=?', function(data) {
        $('p').html('My IP Address is: ' + data.host);
    });
});
Along with the IP address, this service also provide Geo location details as well like Country, latitude, longitude etc. Following are the properties which are returned as JSON response by this service.
data.host;
data.countryName;
data.countryCode;
data.city;
data.region;
data.latitude;
data.longitude;
data.timezone;