<html> <head> <meta charset="UTF-8"> <title>原型扩展和函数继承</title> </head> <body> <script type="text/javascript"> // 定义了Person类 var Person = function(name){ this.name = name; this.say = function(content){ console.log(this.name + " say: " + content); } } // 实例化 var person = new Person("lay"); // 调用函数 person.say("I‘m a person"); // 定义了Student类 var Student = function(name){ // 调用构造函数，继承Person类 Person.call(this, name); } // 实例化 var student = new Student("marry"); student.say("I‘m a student"); // 原型扩展函数 Student.prototype.jump = function(){ console.log("I‘m jumping..."); } // 调用函数 student.jump(); </script> </body> </html>