Add Color Swatches to Product Info Page of Ecommerce website

I need to add color swatches to the product info page of a OSCmax/OSCommerce website. The product_stock table in the database contains info for each color attribute value, so we can use this to store the url for each color swatch image of about 20px by 20px size. Customers should be able to pick a color they want to buy from either the color swatches or the dropdown menu, so both need to be interactive. This should be a pretty easy and straightforward project. Please see the attached file for an example of how the color swatches would look like. Thank you!