ONLY CSS was used for maximum browser compatibility and speed. Additionally, this code package will NOT interfere with jQuery & Java Script already present on the website. This would be an intermediate installation and probably not suited for beginners. Customization of position, colors and other elements is simple and well documented. This compilation of code, less some Zen Cart core GPL code, is licensed to purchasers for use on ANY website they own, maintain or are partnered with. You MAY NOT distribute this code. Others must purchase a license. This sticky Cart was built to improve navigation, usability and conversions for a Zen Cart store by allowing simple access to the shopping cart contents at all times.