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<!DOCTYPE html> <html> <body> <h1>Demo: Inheritance</h1> <script> function Person(firstName, lastName) { this.FirstName = firstName || "unknown"; this.LastName = lastName || "unknown"; } Person.prototype.getFullName = function () { return this.FirstName + " " + this.LastName; } function Student(firstName, lastName, schoolName, grade) { Person.call(this, firstName, lastName); this.SchoolName = schoolName || "unknown"; this.Grade = grade || 0; } //Student.prototype = Person.prototype; Student.prototype = new Person(); Student.prototype.constructor = Student; var std = new Student("James","Bond", "XYZ", 10); alert(std.getFullName()); // James Bond alert(std instanceof Student); // true alert(std instanceof Person); // true </script> </body> </html>
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