html5 - Can you take a "screenshot" of the page using Canvas? -


i have page we're positioning bunch of elements using css, , changing "top , left" positions using js.

i've had reports these things have been misaligned, user has motive lie "cheat", i'm not sure whether they're telling truth. i'm trying find way figure out whether they're lying or not, , have "proof".

i know canvas has method copy image information image element, or canvas element (kind of bitblt operation).

would possible somehow, canvas (or else, flash, whatever), take "picture" of piece of page?
again, i'm not trying take information <image>. i'm trying copy user sees, comprised of several html elements positioned absolutely (and care positions) , somehow upload server.

i understand can't done, maybe i'm missing something.

any ideas?

somebody asked question earlier that's similar this. scroll bottom of youtube , click "report bug" link. google's feedback tool (javascript driven), described. judging looked @ of code, uses canvas , has javascript-based jpeg encoder builds jpg image send off google.

it lot of work, i'm sure accomplish similar.


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