hide unavailable attributes

[longy]

For example in my catalog there are:

- ipod 8gb red

- ipod 8gb blue 

- ipod 16gb

 

So i don't have color attribute for 16gb version of ipod.

 

In the product page, when i select 16gb, color selector doesn't disappear.

Users are also allowed to add to cart the unavailable combination.

Into cart detail color is omitted, but it's confusing for the customer.

 

I also tried to disable under Settings>Product the option 'Show unavailable attribute in product page'. 

Any way to hide unavailable attributes, or avoid to put them in cart?

 

Thanks in advance for replies.

Edited February 16, 2015 by longy (see edit history)