Indexhibit Support

Hi,
i'm using indexhibit 2 for my website and i'd like to add some roll over on my works.
here : granolab.com/index.php/project/contact/ i'd like to see the first picture when i'm hover the second one. how to do that ?
thanks a lot for your help

With css I guess - you either need to build a format that does this or hardcode this in your text area (again either with css or javascript)