function extend(subClass,superClass) { ???//初始化一个中间空对象，为了转换主父类关系 ???var F = function() {}; ???F.prototype = superClass.prototype; ???//让子类继承F ???subClass.prototype = new F(); ???subClass.prototype.constructor = subClass; ???//为子类增加属性superClass ???subClass.superClass = superClass.prototype; ???//增加保险，即使原型是超类Object，那句要把构造函数级别降下来 ???if(superClass.prototype.constructor == Object.prototype.constructor) { ???????superClass.prototype.constructor = superClass; ???}}function Author(name,book) { ???Author.superClass.constructor.call(this,name); ???this.book = book; ???this.getBook = function() { ???????return this.name + ‘--‘ + this.book; ???}}function Person(name) { ???this.name = name;}extend(Author,Person);var peter = new Author(‘long‘,‘keke‘);console.log(peter.getBook())js继承函数封装
原文地址：http://www.cnblogs.com/pjl43/p/7679773.html