NOt sure this will work but worth a try. You could try saving the whole page to your desktop using the file menu at the top of your browser. It will make 2 icons appear on the dekstop, the HTML page and a drawer with all he components of the page, looki in the drawer and see if it has saved the pic you need.
Otherwise open your favorite paint package and also load up the page with your pic on it. With the pic on the screen press the PRTSCR key on the keyboard. Go to your paint package and on the edit menu use the paste option. this should paste the pic which you can crop so you just have the photo.