Mouse over functions

I am wondering if you have an option for a a mouse over image list. I would like to be able to locate individuals on a family tree and when you mouse over or right click on the info box, an image list would pop up so that you can select and view pictures. Most of the galleries I have seen involve static tweaked out albums with thumbnails to click on to go to images or more sub-albums. I imagine the "tree" would be a large navigatable image with information boxes for each individual. The image coding would attach to each info box. Any insight to my situation would be helpful.