User blog comment:Dopp/Technical Update: June 7, 2011/@comment-1271044-20110608175235/@comment-1997905-20110609001118

JS:

As fuzzy has asked that we explain functions like this, all it's doing is adding the attribute  to every   element, which is how the browser knows it's open (at least in Chrome). I'm also inclined to just say don't use, pick a different element.