customize shopping cart in oscommerce

I have a product with different attributes . like My product is computer and it has 1 GB Ram, 2 GB Ram and 4 GB Ram. I want that if user click at 1 Gb then this should be add to cart with 1 GB attribute with its price and if user click at 2 GB Ra开发者_Python百科m then this should be Replace with 1 GB and its price. Every Attribute should be linked like add to cart.

At this time with Os-commerce button add to cart this add all attributes in cart. Any one can help that how this can be possible.

like one attribute display follow

PC2700 NONECC UNBUFFERED 184 PIN DDR DIMM KR. '`

&opt_id=&opt_val=''" />

this is not doing any action please help

try this contribution.

http://www.oscommerce.com/community/contributions,3610