Let me come clean. I’ve always hated pop-ups in web applications. I don’t just mean the ones that tell you you’ve won a cruise or that you’re the Emperor of the World, I mean all of them. It’s always felt like an attempt to apply a desktop paradigm to the web. But, sometimes, there’s a need for something to stop you in your tracks, the sort of thing for which, on the desktop, you’d use a modal dialog. On the web, you’d scratch your head. Until now. The prototype framework and script.aculo.us have enabled some excellent web UI advances. And ModalBox is one of them. Try it out.