举个构造函数和原型模式组合使用定义用户类型的例子，

1. functionUser(name, age, job){
   
2. this.name= name;
   
3. this.age= age;
   
4. this.job= job;
   
5. this.friends=["小白","小飞"];
   
6. }
   
7. 
   
8. User.prototype={
   
9. constructor :User,
   
10. sayName :function(){
    
11. alert(this.name);
    
12. },
    
13. //其他代码
    
14. }
    
15. 
    
16. var user1=newUser("小明",25,"程序员");
    
17. var user2=newUser("度娘",23,"百度HR");
    
18. 
    
19. user1.sayName();//小明
    
20. user2.sayName();//度娘