Upgrading Video card for HP Pavilion dv6-1125?

here is a link for the laptop

http://www.arablinecomputers.com/estore/index.php?main_page=product_info&products_id=191

I don't have any idea about upgrading it, is the only way to do this is replacing the video card? what are the video cards I can use instead of mine?

thanks.|||You cannot upgrade a video card on a laptop. Sorry.