Closure and Callbacks. Good and condence: From [5] From the start of "Chapter 4 Functions" to "Return" section. http://books.google.com/books/about/JavaScript_The_Good_Parts.html?id=PXa2bby0oQ0C http://books.google.com/books?id=PXa2bby0oQ0C&pg=PA26&source=gbs_toc_r&cad=3#v=onepage&q&f=false MDN https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Functions This is a bit long and sparce text, perhaps for reference. It seems touches constructors and Function.prototype.