JavaScript prototypal inheritance example - http://stackoverflow.com/questions/387707/whats-the-best-way-to-define-a-class-in-javascript

prototypal-inheritance.js

// Define a class like this
function Person(name, gender) {
	// Add object properties like this
	this.name = name;
	this.gender = gender;
}

// Add methods like this. All Person objects will be able to invoke this
Person.prototype.speak = function() {
	alert('Howdy, my name is ' + this.name);
};

// Instantiate new objects with 'new'
var Bob = new Person('Bob', 'M');

// Invoke methods like this
Bob.speak() // alerts 'Howdy, my name is Bob'