var hero = new Object();
            hero.name = "xm";
            hero.level = 0;
            hero.diamond =0;
            hero.moveLeft = function(name) {
                console.log("left");
            };
            //只有在当前hero对象的方法中，this才是当前hero对象
            hero.attack = function(name) {
                console.log(this.name +"攻击"+name);
            };
            console.log(hero.name);
            console.log(hero.level);
           hero.attack("xjs");

          function Student(name,age,sex){
                this.name = name;
                this.name = name;
                this.name = name;
            }
            
//            内存开辟空间，存储新创建的对象new Object();
//            会把this设置为当前对象
//            执行函数内部的代码，设置对象的属性和方法
//            返回新创建的对象
            var s1 = new Student("zs",18,1);