I'm in the process of building a website that uses OS commerce as the shopping cart. Let me be clear this up right now: The site is not built on OS Commerce, OS Commerce is ONLY performing shopping cart functions. The product pages and indexes were all built by hand. When I add the 'add to cart' code to the web page I get validation errors. Here is the 'add to cart' code: <form method='post' action='http://www.mysite.com/product_info.php?products_id=IDEE2001U&action=add_product' name='cart_quantity'/> <input type='hidden' name='products_id' value='IDEE2001U' /> <input type="image" src="images/add-to-cart-product.gif" name="Add to Cart" alt="Add this item to your cart." /> </form> Code (markup): I get about 3 errors with the action in the form. It seems that W3C doesn't like any url's with the '&' character in there. Is this going to cause any problems? Is there a simple fix for something like this? Thanks.