The first thing I thought of would be to use JS/jQuery to change the zindex of the element you wish to highlight to higher up (closer to the user) and have a partially transparent overlay appear .show() in jQuery (IIRC).

So you would have:

[viewer]


element to be highlighted
semi-transparent element
main content


Someone else will have to help you with the actual JS if you need assistance there.

How to highlight part of an image and blur the rest?
Clearly scuba can only get you so far, and while we've discussed submarine tours in the past, they are just jaunts.



What's the deepest you can actually go as a tourist, and what about if you were somehow able to charter a vessel (like I gather James Cameron is planning on doing)?
