Theme error? No page reactions on any homepage elements

Hi,

On my site homepage http://www.cartridgecentre.co.uk there is no action. As you can see, the printer brands on the side are supposed to scroll through automatically and further down the page, the shopping cart is supposed to follow you down as you scroll. This happens elsewhere on the site, just not the homepage?

Any advise would be appreciated, the site is live now, so please feel free to snoop around.