<html><head> <title>Prototype Pattern Example</title> <script type="text/javascript"> function Person(){ } Person.prototype = { name : "Nicholas", age : 29, job: "Software Engineer", sayName : function () { alert(this.name); } }; var friend = new Person(); alert(friend instanceof Object); //true alert(friend instanceof Person); //true alert(friend.constructor == Person); //false alert(friend.constructor == Object); //true </script></head><body></body></html>