How to do new style banners? :D

1

Hi all,

I was far away a few months because of joining the army… :p:

Some web sites has strange banners…
When I get mouse over to banner, It becomes bigger… height of the banner increases.

How can you do this.?
Is there any sample?:+)

as you see on this site…
http://www.haberprogram.com/h/2007/06/01/13643-Turk_askeri_kuzey_Irak_ta_hazirolda_Video_-_Galeri.php

thanks…
Ferdi