Comment #2 on issue 1492 by felix8a: caja.js needs a way to kill guests http://code.google.com/p/google-caja/issues/detail?id=1492
some context info http://stackoverflow.com/questions/1626300/how-to-close-an-iframe https://groups.google.com/d/topic/google-caja-discuss/QnuETYoDP_0/discussion
