This is a bit of a cheeky request, and I may be in the wrong forum here as it may be a Javacript question but I love the functionality of the advert on the top of this page for the 'Web Site in the Cloud' advert.
Now I love the way it appears when the page loads and you can click on the 'x' to ditch it.
However, i've never seen this type of advert before:
1) Does it have a specific name?
2) Also are there any tutorials out there which teach you how to create one of these styles of adverts?