The examples of how to share protected data within an inheritance chain in JavaScript using Douglas Crockford's Functional Inheritance Pattern I didn't find particularily clear. I use this example below to remind myself how I perceive it works.

oProtected_example.js

var oSuperclass = function (spec, oProtected)
{
	oProtected = oProtected || {};

	var that = {};
	
	oProtected.supMethod = function()
	{
		console.log('superclass says: ', spec.jamie);
	};

	return that;
}

var oSubclass = function (spec)
{
	var oProtected = {},
	    that = oSuperclass(spec, oProtected);

	oProtected.subMethod = function()
	{
		console.log('subclass says: ', spec.jamie);
	};

	oProtected.supMethod();
	oProtected.subMethod();

	return that;
}

var instance = oSubclass({
	jamie : "mason"
});

>>> superclass says:  mason
>>> subclass says:  mason