attributes products according by user's choice

[ballashop]

I need to exclude attributes products according by user's choice:
I have:
fabric color "A" (selections based on color / texture)
fabric color "B" (selections based on color / texture)

if the customer chooses "A"
"B" must be disabled

 

because the product does not provide A + B

 

perhaps PS 1.6 default can not manage this, you have any suggestions?

thanks

[ballashop]

 

 

I realized that I need an advanced management of attributes because some products have also option "C"

or code customization!