1、繼承方式一：原型鏈
Grand.prototype.lastName = 'kj';
function Grand(){
this.wife = 'xh';
}
Father.prototype= new Grand();
function Father(){
this.name = 'gx';
}
Son.prototype= new Father();
function Son(){
this.name = 'lk';
}
var son = new Son();
2、繼承方式二： 構(gòu)造函數(shù)（通過call()）
function Person(name,age){
this.name = name;
this.age = age;
}
function Student(name,age,grade){
Person.call(this,name,age);
this.grade = grade;
}
function Miny(name,age,grade,sex){
Student.call(this,name,age,grade);
this.sex = sex;
}
var mingy = new Miny('wang',16,17,'nan');
function A(){
this.m1='aaa';
}
function B(){
A.call(this);
}
var w=new B();
3、第三種方式：共享原型
Father.prototype.age = 30;
function Father(){
}
function Son(){
}
Son.prototype = Father.prototype;
var son = new Son();
var father = new Father();
4、第四種方式：圣杯模式
person.prototype.name = 'huluwa';
function person(){
}
function student(){
}
//媒介
function inherit(person,student){
function f(){}
f.prototype = person.prototype;
student.prototype = new f();
student.prototype.constructor = student;
student.prototype.super = person.prototype;
}
inherit(person,student)
var student = new student();
//繼承
person.prototype = {
name : 'huluwa';
age : 17;
}
function person(){
}
student.prototype = new person();
function student(){}
var stu = new student();
