JQ版本：
jQuery(function($) {
var url = 'http://chaxun.1616.net/s.php?type=ip&output=json&callback=?&_=' + Math.random();
$.getJSON(url, function(data) {
alert(data.Ip);
});
});
JS 搜狐接口
<script src="http://pv.sohu.com/cityjson?ie=utf-8"></script>
<script type="text/javascript">
document.write(returnCitySN["cip"] + ',' + returnCitySN["cname"])
</script>
