Reparented sibling frames from unload handlers should load. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS frame1.contentDocument is not null PASS frame2.contentDocument is not null PASS successfullyParsed is true TEST COMPLETE -------- Frame: 'frame1' -------- frame1 -------- Frame: 'frame2' -------- frame2