var mess = new Array('<a href="shop/product_info.php?products_id=76"><img src="images/graphics/rococo_advert.jpg" width="300" height="300" border="0" /></a>','<a href="shop/product_info.php?products_id=74"><img src="images/graphics/maestro_cd_special.jpg" width="300" height="300" border="0" /></a>');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);