Shoutbox

hey, i am looking to create a similar rollover effect that patchou uses on his own website and can be seen here:

http://www.msgplus.net/community.php

when you hover over the links in the green "Affiliates and Useful links" box.

Also on the Windows Vista website on the left navigation pane, roll your mouse over the links, how do i produce that effect?

http://www.windowsvista.com