I have been wondering for the longest time how apple and other websites were able to bring images as an overlay on a webpage. Basically, you have a thumbnail image on your site, and the user wants to look at a larger version. Well, rather then having them go to another page or something like that, the user clicked the image and a larger version of it came up right on top of the page that it is on.
So I had sometime and found how it is accomplished. It is called LightBox. I have found a version if it that I like online from Lokesh Dhakar that I will be incorporating into my site. Check out the examples and how its done on their website www.lokeshdhakar.com