Result Size: 625 x 534
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<!DOCTYPE html>
<html>
<body>
<h2>JavaScript 对象构造函数</h2>
<p id="demo"></p>
<script>
// Person 对象的构造函数
function Person(first, last, age, eye) {
  this.firstName = first;
  this.lastName = last;
  this.age = age;
  this.eyeColor = eye;
  this.nationality = "English";
}
// 创建 2 个 Person 对象
var myFather = new Person("John", "Doe", 50, "blue");
var myMother = new Person("Sally", "Rally", 48, "green");
// Display nationality
document.getElementById("demo").innerHTML =
"My father is " + myFather.nationality + ". My mother is " + myMother.nationality; 
</script>
</body>
</html>