I am looking to develop something simliar to the slide down basket widget at the top of here:

http://microwarehouse.merus.co.uk/

However before i begin i wanted to know i could make it sit above the rest of the page. In otherwords when the basket slide down i would like the rest of the page to remain in situ ie not move, as if the basket slider was floating on top of the rest of the page content.

Not sure i f i have made myself clear but if anyone does understand want i need and u have a solution then i would be ever greatful.