[jQuery] Blockui problem

[Anthony Leboeuf(Worcester Wide Web)]

 Hello everyone, Im having a bit of trouble using blockui. I've added 
the plugin here 
http://pioneer.dlg360.com/order/index.php?act=viewProd&productId=2678 
<http://pioneer.dlg360.com/order/index.php?act=viewProd&productId=2678> 
when you click "add to basket" it should ask you a question(instead it 
asks the question for 2 seconds then submits). But for some reason its 
forcing the submit instead of waiting for the answer as the blockui demo 
shows. I just cant seem to fix it, anyone have any suggestions? here is 
my code http://pastebin.mozilla.org/157254

Thanks any help is appreciated

-Anthony