JavaScript: Execute function via namespace

gistfile1

/**
 * Executes a function by simply providing a namespace
 * @param  {string} functionName A namespace such as '_n.Roles.Order.SetOrderNotes'
 * @param  {obj} context      The Initial object context to start from, such as window
 * @return Returns back the result of whatever the function returns
 */
function executeFunctionByName(functionName, context /*, args */) {
	var args = Array.prototype.slice.call(arguments).splice(2);
	var namespaces = functionName.split(".");
	var func = namespaces.pop();
	for(var i = 0; i < namespaces.length; i++) {
		context = context[namespaces[i]];
	}
	return context[func].apply(window, args);
}