1 rect circle poly default top middle bottom left right #[0-9a-fA-F]{6} ltr rtl left center right 0 1 yes no auto noresize disc square circle compact noshade left all right none declare data ref object ismap nohref get post checked disabled readonly multiple selected top bottom left right button submit reset left center right justify char top middle bottom baseline top bottom left left ltr rtl preserve defer preserve preserve rect declare