原型继承，为什么alert弹不出窗口

Question

<script type="text/javascript">
    // 方法3 原型继承
    var Obj3 = new Function();
    Obj3.prototype = {
        v1: "",
        get_v1: function() {
            return this.v1;
        },
        set_v1: function(v) {
            this.v1 = v;
        }
    };
    var obj3 = new Obj();
    obj3.set_v1('hello3');
    alert(obj3.get_v1());
</script>

Answer 1

var obj3 = new Obj(); => var obj3 = new Obj3();

Answer 2

你确定代码写对了？

var Obj3 = new Function();
// 方法3 原型继承
var Obj3 = new Function();

Obj3.prototype = {
    v1: "",
    get_v1: function() {
        return this.v1;
    },
    set_v1: function(v) {
        this.v1 = v;
    }
};

var obj3 = new Obj3();

obj3.set_v1('hello3');
alert(obj3.get_v1());

Answer 3

new错了..