}
});

以上代码功能也是一样 但是感觉更好了 是不是有一点所谓jq中使用ajax的感觉了 此刻可以啦啦啦的 跳个舞了 千万不要满足

代码4:钻石水平

var $ = {
    ajax: function (json) {
        var req = new XMLHttpRequest();
        var type = json["type"];
        var url = json["url"];
        if (json["data"]) {
            var html = "?";
            for (var i in json["data"]) {
                html += i + "=" + json["data"][i] + "&";
            }
            html = html.substring(0, html.length - 1);
            url += html;
        }
        var success = json["success"];
        req.open(type, url, true);
        req.send();
        req.onreadystatechange = function () {
            if (req.readyState == 4 && req.status == 200) {
                var result = req.responseText;
                if (json["dataType"] == "json") {
                    result = JSON.parse(result);
                }
                success(result);
            }
        }
    }
}