I don't know how to ask this question on google to research this...so I'm hoping someone can help!
On the site hotspring.com, when you select a spa, then choose "color selector" (or scroll down), they have it set up where depending on what cabinet or shell color you select, it will change the top half and bottom half of the image accordingly. (not the whole image, just the top and bottom halves) How can I recreate this?