JSOO(JS面向对象)的一些理解

<script type="text/javascript">

    ///<summary>
    /// Animal类
    ///</summary>
    function Animal(name) {
        //属性
        this.Name = name;
        

        //public 方法
        this.Shout = function () {
            alert("我是一只Animal，我的名字叫 " + this.Name);
        };

        //private 方法
        var _Shout = function () {
            alert("private _Shout");
        };
    };
    ///<summary>
    /// Cat类
    ///</summary>
    function Cat() {
        this.Catch = function () {
            alert("我是一只Cat,我在捉老鼠");
        };
        //Cat类自己Shout
        //this.Shout = function () {
        //    alert("我是一只Cat,喵喵~");
        //};
    };
    Cat.prototype = new Animal(); //Cat继承自 Animal

    //测试
    window.onload = function () {
        var a1 = new Animal();
        a1.Name = "咪咪a1";
        a1.Shout();
        //构造方法
        var a2 = new Animal("旺旺a2");
        a2.Shout();

        var c1 = new Cat();
        c1.Name = "拉拉c1";
        c1.Catch();
        c1.Shout();

    };
    
</script>