Okay here is what I need. I'm starting a website selling shoes and on the 'Buy' page, I need a dynamically populated dropdown box. Let's say I have 10 pairs of size 11, well I need the dropdown box to be smart enough to know that when 10 people purchase size 11, I have run out of size 11 and this option no longer appears in the dropdown box. Also, I need to be able to link the size the person picks in the dropdown box to the paypal website so that when the person checks out, it specifies what shoe size/type of shoe they have selected. Thanks.