Extra Add To Cart Button

I would like to have a second add to cart button at the bottom of the product page after the product description, so customers are more tempted to buy a product.

I did this by copy pasting the div with add to cart to the bottom of the page behind product, which worked fine till I found out product options don't work properly anymore. When you select an option in the select box it jumps back to the default. I wonder which variables might be causing this effect?

Instead of duplicating default button code, try to use new button with the cm-external-click class. More details can be found here:

http://docs.cs-cart.com/4.1.x/core/front-end/microformats.html