1 /*********对象冒充**********/
2 function Parent(username){
3 this.username=username;
4 this.sayHello=function(){
5 alert(this.username);
6 }
7 }
8 function Child(username,password){
9 this.method=Parent;
10 this.method(username);
11 delete this.method;
12 this.password=password;
13 this.sayWorld=function(){
14 alert(this.password);
15 }
16 }
17 var parent1 = new Parent("jack");
18 var child1 = new Child("kyle","123");
19 parent1.sayHello();
20 child1.sayHello();
21 child1.sayWorld();
22 /*********对象冒充**********/
23 /********call方法**********/
24 function Parent(username){
25 this.username=username;
26 this.sayHello=function(){
27 alert(this.username);
28 }
29 }
30 function Child(username,password){
31 Parent.call(this,username);
32 this.password=password;
33 this.sayWorld=function(){
34 alert(this.password);
35 }
36 }
37 var p1=new Parent("jack");
38 var c1=new Child("kyle","123");
39 p1.sayHello();
40 c1.sayHello();
41 c1.sayWorld();
42 /********call方法**********/
43 /********apply方法********/
44 function Parent(username){
45 this.username=username;
46 this.sayHello=function(){
47 alert(this.username);
48 }
49 }
50 function Child(username,password){
51 Parent.apply(this,new Array(username));
52 this.password=password;
53 this.sayWorld=function(){
54 alert(this.password);
55 }
56 }
57 var p1=new Parent("jack");
58 var c1=new Child("kyle","123");
59 p1.sayHello();
60 c1.sayHello();
61 c1.sayWorld();
62 /********apply方法********/
63 /********原型链**********/
64 function Parent(){}
65 Parent.prototype.hello="hello";
66 Parent.prototype.sayHello=function(){
67 alert(this.hello);
68 }
69 function Child(){}
70 Child.prototype = new Parent();
71 Child.prototype.world = "world";
72 Child.prototype.sayWorld = function(){
73 alert(this.world);
74 }
75 var c1 = new Child();
76 c1.sayHello();
77 c1.sayWorld();
78 /********原型链**********/
79 function Parent(hello){
80 this.hello=hello;
81 this.sayHello=function(){
82 alert(this.hello);
83 }
84 }
85 function Child(hello,world){
86 Parent.call(this,hello);
87 this.world=world;
88 this.sayWorld=function(){
89 alert(this.world);
90 }
91 }
92 Child.prototype=new Parent();
93 Child.prototype.constructor=Child;
94 var c1=new Child("hello","world");
95 c1.sayHello();
96 c1.sayWorld();
