I’ve seen this in a number of fan pages, but I can’t seem to find the method that this can be done.
I’ve got a coupon for my fans that I want to show in a tab. but I want the tab to be visible only after the visitor press the like button.
I’ve seen some tabs where you can actually see the coupon under another transparent graphic that says something like “press the like button”.
Does anyone knows how this can be accomplished? Is it FBML, Iframe? what’s being used here?