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120.测试tostring.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script>
        function Person(name,age,gender) {
            this.name=name;
            this.age=age;
            this.gender=gender;
            this.toString('a')
        }
        var ggc=new Person('ggc',18,'nan');
        ggc.prototype={
            toString:function () {
                return  'c'
            }
        }

        console.log(ggc);
    </script>
</head>
<body>
未解决
</body>
</html>