I\'m interested in putting an inset box shadow on something like an iframe. While the strategy of overlaying a div over the iframe gives the expected visual display, the div sub
Yes, there's pointer-events: none.
See: http://jsfiddle.net/YqXPg/3/
A version that makes the overlay more obvious: http://jsfiddle.net/YqXPg/4/
Note that this property doesn't work with IE, but if I remember correctly, IE will allow you to click through the transparent parts of the overlay div
anyway.