gistfile1.js

String.prototype.namespace = function(objects, scope){
	scope = scope || window;
	this.split('.').each(function(name){
		if (Object.isUndefined(scope[name])) scope[name] = {};
		scope = scope[name]; 
	});
	
	if (objects) Object.extent(scope, objects);
	return scope;
}

'com.pixeldepo.some.package'.namespace();