i have spend the last hour goggling and searching this forum for banner rotation

heres what im trying to do..

i have many sponsors fighting for a top spot on a widget on the portal

i have been told that i can rotate the sponsors images so after say 3 sec they change to the next sponsor and so on and so on

i have a code to fit a banner at the top of the page and one at the bottom

all im asking for as someone to post some code that i can drop into my forum

and where to put it too