History

Time	Change
2009-10-12 07:11:48+00:00	Created
2009-10-12 07:11:48+00:00	Associated with UndoManager
2011-09-03 02:30:14+00:00	Associated with UndoManager and DOM Transaction
2015-04-21 05:49:42+00:00	Associated with undo
2015-04-21 05:49:42+00:00	Associated with Undo
2015-04-21 05:49:42+00:00	Associated with 元に戻す