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Result Size: 625 x 571
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<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Objects</h2>
<p>You cannot add a new property to a constructor function.</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 myFather = new Person("John", "Doe", 50, "blue");
var myMother = new Person("Sally", "Rally", 48, "green");
document.getElementById("demo").innerHTML =
"The nationality of my father is " + myFather.nationality; 
</script>
</body>
<!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_object_prototype3 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:39:36 GMT -->
</html>
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