<script src="http://pv.sohu.com/cityjson?ie=utf-8"></script> <script type="text/javascript"> document.write(returnCitySN["cip"]+‘,‘+returnCitySN["cname"]) </script>
http://pv.sohu.com/cityjson?ie=utf-8
返回结果：
var returnCitySN = {"cip": "203.100.83.125", "cid": "CN", "cname": "CHINA"};
原文：http://www.cnblogs.com/xbblogs/p/7874879.html