function teacher (name,age,type){

? ? this.name = name;

? ? this.age = age;

? ? this.type = type;

}

var student ={

? ? name:"zhangsan",

? ? age : 20,

? ? hobby :["體育","閱讀","游戲"]

}

alert(student.name);

alert(student.hobby);

alert(student.teacher.name);?