XHTML 1.1 Element ( Tag ) and Attribute Reference
XHTML 1.1 Reference Index > Forms Module Index
The optgroup element ( tag )
contents
optgroup: valid parent and child elements
optgroup: valid attributes
- by attribute type
- Core: class, id, title
- Internationalization: charset, dir, hreflang, xml:lang
- Events: onclick, ondblclick, onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover, onmouseup
- Style: style