How To Make This Type Of Link? Image change on mouseover

I cant figure out how to solve this problem....I want to make link to be like this:When the page is loaded to have a pictures on it, but one picture is a link. I want to make this picture to change when I get my mouse cursor over her... I mean: when my mouse cursor is not on a picture then on page is loaded a "pic1.gif" file, but when my mouse cursor is over it, picture changes to a "pic2.gif".Thanks for help!

Google on : "on:hover image replacement" will show you 838 replies. The mezzoblue one is good. also go to http://bonrouge.com/~home for some really cool image swapping stuff.