​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(first, last, age, eye) {
  this.firstName = first;
  this.lastName = last;
  this.age = age;
  this.eyeColor = eye;
}
​
// 创建 Person 对象
var myFriend = new Person("Bill", "Gates", 62, "blue");
​
// 显示年龄
document.getElementById("demo").innerHTML =
"My friend is " + myFriend.age + "."; 
</script>
​
</body>
</html>
​