如：

 $.ajax({                    url: "http://www.XXX.com?cb=qrymylist_callback",                    dataType: "jsonp",                    jsonp: "qrymylist_callback",                    type: "get",                    cache: false,                    data: "Uin=" + MGR.getUinNum(MGR.appcookie("uin")) + "&skey=" + MGR.appcookie("skey") + "&Uname=" + encodeURIComponent(MGR.Uname)                });            }function qrymylist_callback(a) {    //回调函数}

  服务器端：   qrymylist_callback({"ret":"服务器异常,请稍后重试!","retcode":"10"})