Okay, I've tried a host of things, but am not getting results I expect. Is callback doing what I think it is or something different? I have now posted a copy of the site(IE users beware, I haven't formatted for IE!) at http://blah.eu5.org/
if that helps anyone as it's making me pull my hair out.
As someone new to jQuery, I think I may have bitten off more than I can chew!