Magento compare product modification

Hi. I need some custom code to add to a magento theme template that will use javascript to add a thumbnail of a product to a small box at the top of the listing when a user clicks on "add to compare". I would like a small animation as the item image is transferred to the box. I can't show you an example of the animation, but it should be in the style of how box are open and closed on a mac. I've attached a screenshot of the type of design it will be used on. When the user clicks on "compare items" the regular compare will open. The user will also be able to remove the items from the compare box. I don't need this an extension, just some extra code to use in the template files. Thanks