It would be helpful perhaps to monitor network traffic via firefox's developer tools (other browsers have similar i guess). you may be lucky that eventually the convoluted javascript-based, ajax-based webpage leads you to an image url which is straightforward to reconstruct.

Ideally, your scraping script should be as autonomous as possible, so you can be at the beach when it scrapes from a datacenter dungeon - scripts like this kind of hell. Improving your skills to this end, I would personally consider it Life's purpose.