jquery 非异步读取数据

1  var alldata = null;
2             $.ajax({
3                 type: "get",
4                 url: "/Portal/Provider/GetDefultPic.ashx?round=" + Math.random(),
5                 data: "name=John&location=Boston", async: false,
6                 success: function(msg) {
7                     alldata = msg;
8                 }
9             });