[1] expando Property (attribute, document) (2/17/2007, 4:37:11 PM 版) http://msdn.microsoft.com/workshop/author/dhtml/reference/properties/expando.asp
[2] Content Attributes and DOM Expandos Are No Longer Connected (Windows) ( (6/30/2013, 6:50:36 PM 版)) http://msdn.microsoft.com/ja-jp/library/ie/gg622931(v=vs.85).aspx
Google search: expando