JavaScript Class using JSON prototype

/// <summary>
/// Class that represents a customer of our store.
/// The constructor receives the name of the customer
/// </summary>
/// <param name="firstName"> First name of the customer.
/// <param name="lastName"> Last name of the customer.
function Customer(firstName, lastName)
{
 // Properties
 this.FirstName = firstName;
 this.LastName = lastName;
}

Customer.prototype = {

 /// <summary>
 /// Returns the first name of the customer
 /// </summary>
 GetFirstName: function()
 {
  return this.FirstName;
 },
 
 /// <summary>
 /// Returns the last name of the customer
 /// </summary>
 GetLastName: function()
 {
  return this.LastName;
 },
 ...
}

Usage:

var aCustomer = new Customer("Pablo","Bustos");
alert("Hello " + aCustomer.GetFirstName());

Good programmers

Any fool can write code that a computer can understand. Good programmers write code that humans can understand.

Refactoring: Improving the Design of Existing Code by Martin Fowler