数据保护的方法

数据保护

var My_Data = {
    Change_Num:10,
    changeNum:function(value){
        this.Change_Num += value
        if(this.Change_Num > 6) this.Change_Num = 3
        if(this.Change_Num < 3) this.Change_Num = 5
    },
    getNum:function(){
        return this.Change_Num
    }
}