A simple snippet for reducing code when extending prototypes .

extends.js

Function.prototype.extends = function(Parent) {
	this.prototype = Object.create(Parent.prototype);
	this.prototype.constructor = this;
};

//Now
/*
function Rectangle(w, h) {
	this.width = w;
	this.height = h;
}

Rectangle.prototype.getArea = function() {
	return this.height * this.width;
}


function Square(size) {
	Rectangle.call(this, size, size);
}

Square.extends(Rectangle);
*/