​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>JavaScript 对象构造器</h1>
​
<p id="demo"></p>
​
<script>
// Person 对象的构造器函数
function Person(firstName,lastName,age,eyeColor) {
  this.firstName = firstName;
  this.lastName = lastName;
  this.age = age;
  this.eyeColor = eyeColor;
  this.changeName = function (name) {
    this.lastName = name;
  }
}
// 创建 Person 对象
var myFriend = new Person("Bill","Gates",62,"green");
​
// 修改姓氏
myFriend.changeName("Jobs");
​
// 显示姓氏
document.getElementById("demo").innerHTML =
"My friend's last name is " + myFriend.lastName;
</script>
​
</body>
</html>
​