Image Plus by Doobox

Image Plus has been a great stack as I need to add a lot of info next to photos. The one problem I seem to be having is that although the image correctly sizes left to right, they do not always fit top to bottom. I need for the image to scale-to-fit depending on the browser size. Any help would be appreciated! Here is a link to one of the pages in question. Bringing up any image will show the issue.