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?
You must make sure that once the user clicks the X, it is never shown again.