When you select elements from the Document Object Model (DOM) using the functions Prototype provides, each returned element is extended with extra functionality. In this, the second article in "Eight Weeks of Prototype," I will show you exactly how Prototype extends these elements.
Because of the limitations of HTTP, it is difficult to monitor the status of files as they are uploaded via HTML forms. While other programming languages have built-in methods to monitor file uploads, PHP does not. This article shows how to implement such a solution in PHP. We will use Ajax to retrieve information about a file as it is being uploaded and display the progress back to the user.
You might have been in a situation before where you had a list of items in your database that needed to be output in a specific order. These items could be anything: perhaps a listing of your favourite movies or your favourite books. For whatever reason, you want them ordered in a custom way that can't be determined automatically (such as alphabetical).
This article covers the implementation of a system that lets you easily define the order of such a list.