js-prototype-inheritance

function PhysicsBody( aNode ) {
    this.userData = aNode;
}

PhysicsBody.prototype.pbMethod = function () {};

function DynamicBody( aNode ) {
    PhysicsBody.call( this, aNode );
}

// setting up the inheritance
DynamicBody.prototype = Object.create( PhysicsBody.prototype );

DynamicBody.prototype.dbMethod = function () {};

//var Shop = Shop || {};
//
//Shop.Cart = function(options) {
//      
//    //call parent constructor
//    Shop.GlobalShopCart.call(this, options);
//    
//};
//
////set up prototype
//Shop.Cart.prototype = Object.create( Shop.GlobalShopCart.prototype);