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Specification: http://www.w3.org/TR/html5/ Multipage: http://www.whatwg.org/C#top Complete: http://www.whatwg.org/c#top Comment: There is no support for nested <optgroup>s. Posted from: 85.228.29.169 User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:14.0) Gecko/20100101 Firefox/14.0.1
Yeah, we tried to do this early on but it turns out the legacy parsing requirements make it impractical. :-(