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| Tag | Attribute | 2.0 | 3.0 | 3.2 | 4.0 | Internet Explorer |
Mosaic | Netscape | Opera | |
|---|---|---|---|---|---|---|---|---|---|---|
| Kbd | X | X | X | X | 1.0 | 2.0 | 1.0 | -- | ||
| %Core% | -- | X | -- | X | 3.0 | -- | 4.0B2 | -- | ||
| %Events% | -- | -- | -- | X | 4.0B1 | -- | -- | -- | ||
| %Language% | -- | X | -- | X | 4.0 | -- | -- | -- | ||
| Keygen | -- | -- | -- | -- | -- | -- | 3.0 | 3.0 | ||
| Challenge | -- | -- | -- | -- | -- | -- | 3.0 | 3.0 | ||
| Name | -- | -- | -- | -- | -- | -- | 3.0 | 3.0 | ||