Hi,
I'm using 'stock by attributes'.
I want, that zencart do not display attributes for item, that have quantity=0.
Example:
product: t-shirt
attributes: color and size
color: red, black
size: s, m

Now.
red S = 3
red M = 0
black S = 0
black M = 1


When client want buy this t-shirt, he/she don't know witch color and size are available. So I want that zencart will display (in my example)

red S
black M

but not 'red M' and 'black S'.


How to do it?
Regards