源代码 ：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>开源教程(ossoft.cn)</title> </head> <body> <h2>JavaScript 对象</h2> <p>你无法给构造函数添加新的属性。</p> <p id="demo"></p> <script> function Person(first, last, age, eye) { this.firstName = first; this.lastName = last; this.age = age; this.eyeColor = eye; } Person.nationality = "English"; var myFather = new Person("John", "Doe", 50, "blue"); var myMother = new Person("Sally", "Rally", 48, "green"); document.getElementById("demo").innerHTML = "我父亲的国籍是 " + myFather.nationality; </script> </body> </html>
运行结果