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<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>无标题文档</title> <script> //继承 : 子类不影响父类，子类可以继承父类的一些功能 ( 代码复用 ) //属性的继承 : 调用父类的构造函数 call //方法的继承 : for in : 拷贝继承 (jquery也是采用拷贝继承extend) function CreatePerson(name,sex){ //父类 this.name = name; this.sex = sex; } CreatePerson.prototype.showName = function(){ alert( this.name ); }; var p1 = new CreatePerson(‘小明‘,‘男‘); //p1.showName(); function CreateStar(name,sex,job){ //子类 CreatePerson.call(this,name,sex); this.job = job; } //CreateStar.prototype = CreatePerson.prototype; extend( CreateStar.prototype , CreatePerson.prototype ); CreateStar.prototype.showJob = function(){ }; var p2 = new CreateStar(‘黄晓明‘,‘男‘,‘演员‘); p2.showName(); function extend(obj1,obj2){ for(var attr in obj2){ obj1[attr] = obj2[attr]; } } </script> </head> <body> </body> </html>
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原文地址：http://www.cnblogs.com/liujin0505/p/4382433.html
