[giow] (3) HTMLFormElement[name] can return several kinds of elements.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=23065
Affected topics: DOM APIs

git-svn-id: http://svn.whatwg.org/webapps@8249 340c8d12-0b0e-0410-8428-c7bf67bfef74