Clapping hands

for a customer project we are looking after, we would like to explore an idea consisting in a 3d animation (no flash, java preferred) for customer's website. briefly, we would like to see two clapping hands animation during which every time the hands open a different image shows up and every time the hands close the image itself fades out. the animation is supposed to loop several times to allow multiple images to be inserted (ca. some half dozen)