Right, got a question for the java genious's out there.

I've got links to different albums on my website. What I want to do is when I mouseover one of the links, I want a square thumbnail of the album art, say 60x60 or whatever to show up, and when i move off, the image goes away..kinda like a preview.

any ideas how to do this, or any tutorials where I can learn myself? thanks guys! x