Hi everyone,

After couple weeks of learning Drupal CMS, I am very impressed and can convert most of the website to Drupal. However, I have a function I can't seem find a solution. The question is to create the interactions between blocks.

One block is an image gallery which has a horizontal thumbnails navigation at the bottom. The image selected from the horizontal navigation shows at the top of the image gallery block. The other block has a single image with caption.

Image gallery contains the products after redesign. The single image is the product before redesign.

The function I would like to accomplish is when the user selects or clicks on one of the thumbnail on the image gallery navigation, the single image block will show the before redesign image and the image gallery top portion will show the after redesign image.

After couple days of Google and Drupal forum research, I can't find a solution. If anyone can give me any directions, it would be greatly appreciated.