Forum Moderators: open
You have a couple of choices here:
You could use an iFrame and have the link load a page containing the image in the iFrame, using hte target attribute. One disadvantage of this is that you need to have a seperate HTML page per image.
The second option is to use a script and have your image area as a <div>. You script could use the innerHTML property to change the image to the one you desire. This is a cleaner option in my opinion.
HTH