json 包含字段及函数的写法

在javascript中写类有多种方式: 1.function()中嵌套function; 2.prototype的方式 ,3.json的方式,如下:
<script language="javascript">
var Mouse={
    m_name:"Big Mouse",
    m_age:1,
    getName:function(){
        return Mouse.m_name;
    },
    getAge:function(){
        return Mouse.m_age;
    },
    setName:function(str_name){
        Mouse.m_name=str_name;
    }
};

var m_name=Mouse.getName();
var alert_="";
alert_+=m_name+" , ";
Mouse.setName("Small Mouse");
m_name=Mouse.getName();
alert_+=m_name;
alert(alert_);
</script>