Show With Dimmed Button Those Sizes That Are Out Of Stock

[Pablo P]

Hi.

I want to know if I can achieve this funcionality with prestashop.

I managed to show sizes like buttons to select.

But what I need now is to make Prestashop show as dimmed button those specific sizes that are out of stock.

Like in this site:

http://www.dickssportinggoods.com/product/index.jsp?productId=35201406&page=12&cp=4406646.4413987.4417989.63266056&categoryId=4418011

Is that posible? How?

My version is the last, 1.6.1.2.

Thank you.