GoogleChrome/dialog-polyfill — pull request #26 by samthor (2014-11-03 05:27:25+00:00)
Title: Prevent tab focus from leaving dialog

Just closing out some of the modality support. I've tested on FF, Safari and IE10 (back to IE8 mode).
(There's a few TODOs, but the behaviour to fix them is too complicated for this first pull request).