go to this site.
https://addons.mozilla.org/en-US/fir.../previews/1190
click on any of the preview images.
then the effect that follows our click is awesom.
disabling the rest of the page and higlighting our own.

this sort of effect is also shown in the new template of ORKUT. (when trying to change the photo)
can any one tell me how to implemnt that effect.

plss..