I finished a new commercial extension for adding a JavaScript progress bar to a web page. More information at http://www.tom-muck.com/extensions/help/TFMProgressBar/. The ones that I have seen have either been Flash or animated gifs, so I thought I would make my own using JavaScript. The extension interface makes it easier to apply to a page on any element event, and edit parameters as you see fit (size, color, speed, etc.)