<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Object Constructors</h1>
<p id="demo"></p>
<script>
function Person(first, last, age, eye) {
this.firstName = first;
this.lastName = last;
this.age = age;
this.eyeColor = eye;
}
const myFather = new Person("John", "Doe", 50, "blue");
const myMother = new Person("Sally", "Rally", 48, "green");
myMother.changeName = function (name) {
this.lastName = name;
}
myMother.changeName("Doe");
document.getElementById("demo").innerHTML =
"My mother's last name is " + myMother.lastName;
</script>
</body>
</html>