function handleResponse(response) {

    alert("You’re at IP address " + response.ip + ", which is in " + response.city + ", " + response.region_name);

} 

var script = document.createElement("script");

script.src = "http://freegeoip.net/json/?callback=handleResponse";

document.body.insertBefore(script, document.body.firstChild); 

function getVideoList(data) {

    console.log(data.retStr.length)

}

var script = document.createElement("script");

script.src = "http://video.baomihua.com/play2/interface/getmobilerefvideo.html&pagetype=listCod&vid=29203608&channelid=8&type=m&jsoncallback=getVideoList";

document.body.insertBefore(script, document.body.firstChild);

<!DOCTYPE html>

<html lang="zh-CN">

<head>

    <meta charset="utf-8">

    <title></title>

</head>

<body>

    <script src="http://static01.baomihua.com/js/lib/jquery-1.4.4.min.js?t=20120926.js"></script>

    <script>

        // http://www.google.com.hk/?jsoncallback=getVideoList

        $.ajax({

            url: 'http://www.google.com.hk/',

            dataType: 'jsonp',

            jsonp: 'jsoncallback', // 给程序取值

            jsonpCallback: 'getVideoList', // 不产生随机数，接口缓存

            error: function(XMLHttpRequest, textStatus, errorThrown) {

                // XMLHttpRequest.readyState

                // XMLHttpRequest.status

                // XMLHttpRequest.statusText

                // textStatus

            },

            success: function(data) {}

        })

        // http://www.google.com.hk/?callback=jsonp1384414552005

        $.ajax({

            url: 'http://www.google.com.hk/',

            dataType: 'jsonp',

            success: function(data) {}

        })

        // http://www.google.com.hk/&jsonpcallback=getVideoList

        $.ajax({

            url: 'http://www.google.com.hk/&jsonpcallback=?',

            dataType: 'jsonp',

            jsonpCallback: 'getVideoList',

            success: function(data) {}

        })

        // http://www.google.com.hk/?jsonpccallback=jsonp1384414552006

        $.getJSON('http://www.google.com.hk/?jsonpccallback=?', function() {})

    </script>

</body>

</html>