The URL won't pop up automatically when you run your cursor over the image, you need to right click and choose either "properties" or "link properties" either one should get you the URL.
Copy and paste the address into your reply should do the trick.
Hope this helps.
P.S.: Be glad that you never had to work in the "Dark place", i.e. the days prior to graphics driven menus and screens, or the old BBS message boards tough to navigate those.
![Wink [;)]](/FSM/CS/emoticons/icon_smile_wink.gif)