The phone rang at 8:45 PM. "Help!" the client said. "We just sent an email out to 18,000 people and the slideshow on the home page doesn't work. Please fix it ASAP! This is an emergency!"
This is a relatively new client, one with whom we just started working in the last 2 weeks, and they have an existing Joomla website. They asked us to add a few things here and there, but we had never touched the slideshow on the home page. We weren't even sure how it was put together -- we simply hadn't had the time to look.
Having poked around the back end of the site, as well as looking at HTML and the front-end layout, we realized the slideshow on the home page was built using Flash. The slideshow was a SWF file. It was nothing special -- just a fade-in, fade-out series of images that could be clicked to go to the relevant pages.