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<!DOCTYPE html> <html> <body> <h1>JavaScript 对象</h1> <p>您不能将新属性添加到构造函数。</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 myFriend = new Person("Bill", "Gates", 62, "blue"); var myBrother = new Person("Steve", "Jobs", 48, "green"); document.getElementById("demo").innerHTML = "The nationality of my friend is " + myFriend.nationality; </script> </body> </html>