5.3 JSON（重点）

<script>
        var Student={
            name: '秦疆',
            age: '20',
            run: function () {
                console.log(this.name + "run.....")
            }
        }

        var xiaoming={
            name:'xiaoming'
        };

        xiaoming.__proto__=Student;

        // 字符串转为对象
      var obj =  JSON.parse('{"naem":"秦疆","age":"20","sex":"男"}');
    </script>