请指教:prototype.js ajax里面onSuccess 里面调用 公有成员函数的问题

 

 1var Person = Class.create();
 2Person.prototype ={
 3    initialize:function(){
 4        this.name="BOY";
 5    },
 6    GetName:function(){
 7        alert(this.name);
 8    },
 9    AjaxQuestion:function(){
10        var option={
11            method:"get",
12            parameters:"",
13            onSuccess:function(transport){ 
14               alert("hello1");  
15                this.GetName();    // 这里没反应            
16                alert("hell02");
17            },
18            onFailure:function(transport){
19                alert("Failure");
20            }
21        }
22        var request= new Ajax.Request("ajax.aspx",option);
23    }
24}
25// 调用
26var ps = new Person();
27  ps.GetName();
28  ps.AjaxQuestion();