$("a#bannerlink").attr('href', 
'http://www.timothytaylorpubs.co.uk');

$("img#bannerlink").attr('src', 
'http://www.timothytaylorpubs.co.uk/pageflip/BLANKBANNER.gif');

 /* THE TOP ONE IS THE LINK WHEN THE BANNER IS CLICKED, THE BOTTOM ONE IS THE IMAGE */