a - f
ATTRIBUTE DESCRIPTION ELEMENT
abbr cell's content abbreviation TD, TH
accept-charset list of supported charsets FORM
accept list of MIME types for file upload FORM, INPUT
accesskey accessibility key character A, AREA, BUTTON, INPUT, LABEL, LEGEND, TEXTAREA
action server-side form handling script FORM
align text and data alignment COL, COLGROUP, TBODY, TD, TFOOT, TH, THEAD, TR
alt short description AREA, IMG, INPUT
archive space-separated list of URIs OBJECT
axis comma-separated list of related cells TD, TH
border border width TABLE
cellpadding spacing within cells TABLE
cellspacing spacing between cells TABLE
char alignment by char COL, COLGROUP, TBODY, TD, TFOOT, TH, THEAD, TR
charoff offset for alignment by char COL, COLGROUP, TBODY, TD, TFOOT, TH, THEAD, TR
charset character encoding of the linked resource A, LINK, SCRIPT
checked pre-selected radio button or checkbox INPUT
cite URI for cited document or message BLOCKQUOTE, DEL, INS, Q
class space-separated list of classes All elements but BASE, BASEFONT, HEAD, HTML, META, PARAM, SCRIPT, STYLE, TITLE
classid identifies an implementation of embedded object OBJECT
codebase base URI for classid, data or archive OBJECT
codetype content type for code OBJECT
cols vertical width of frames or textarea FRAMESET, TEXTAREA
colspan number of cols spanned by cell TD, TH
content property's value META
coords coordinates of a shape A, AREA
data reference to object's data OBJECT
datetime date and time of change DEL, INS
declare declare but don't instantiate embedded object OBJECT
defer defer execution of a script SCRIPT
dir direction of text All elements but APPLET, BASE, BASEFONT, BR, FRAME, FRAMESET, IFRAME, PARAM, SCRIPT
disabled disabled form's control BUTTON, INPUT, OPTGROUP, OPTION, SELECT, TEXTAREA
enctype form's encoding type FORM
for labeling of specific form's control LABEL
frame which parts of frame to render TABLE
frameborder enables frame borders FRAME, IFRAME

g - n
ATTRIBUTE DESCRIPTION ELEMENT
headers list of id's for header cells TD, TH
height element's height IMG, OBJECT
href URI for linked resource A, AREA, BASE, LINK
hreflang language code A, LINK
http-equiv HTTP response header name META
id document-wide unique id All elements but BASE, HEAD, HTML, META, SCRIPT, STYLE, TITLE
ismap use server-side image map IMG, INPUT
label shorter label for options OPTGROUP, OPTION
lang language code All elements but APPLET, BASE, BASEFONT, BR, FRAME, FRAMESET, IFRAME, PARAM, SCRIPT
longdesc link to long description IMG, FRAME, IFRAME
marginheight margin height FRAME, IFRAME
marginwidth margin width FRAME, IFRAME
maxlength max chars for text fields INPUT
media document designed for certain media STYLE, LINK
method HTTP method for form submission FORM
multiple enable multiple selections SELECT
name name of an element or control A, BUTTON, FORM, FRAME, IFRAME, IMG, INPUT, MAP, META, OBJECT, PARAM, SELECT, TEXTAREA
nohref element without link reference AREA
noresize prevent frames resizing FRAME

o - z
ATTRIBUTE DESCRIPTION ELEMENT
onblur element lost focus event A, AREA, BUTTON, INPUT, LABEL, SELECT, TEXTAREA
onchange element changes content event INPUT, SELECT, TEXTAREA
onclick pointer single click event All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE
ondblclick pointer single double click event All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE
onfocus element received focus event A, AREA, BUTTON, INPUT, LABEL, SELECT, TEXTAREA
onkeydown key pressed down event All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE
onkeypress key pressed and released event All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE
onkeyup key released event All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE
onload document loaded event BODY, FRAMESET
onmousedown pointer pressed down event All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE
onmousemove pointer moved event All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE
onmouseout pointer moved away event All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE
onmouseover pointer moved onto event All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE
onmouseup pointer released event All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE
onreset form reset event FORM
onselect text selected event INPUT, TEXTAREA
onsubmit form submitted event FORM
onunload document unloaded event BODY, FRAMESET
profile space-separated list of meta data profiles HEAD
readonly text and password readonly limitation INPUT, TEXTAREA
rel forward, next (or other) link types A, LINK
rev reverse, previous link types A, LINK
rows horizontal width of frames or textarea FRAMESET, TEXTAREA
rowspan number of rows spanned by cell TD, TH
rules rulings between rows and cols TABLE
scheme scheme for property's value META
scope scope of covered header cells TD, TH
scrolling enable scrollbar FRAME, IFRAME
selected pre-selected option OPTION
shape shape of an area A, AREA
size size of text field or number of visible rows INPUT, SELECT
span number of columns spanned by column group COL, COLGROUP
src URI for an external script FRAME, IFRAME, IMG, INPUT, SCRIPT
standby message to show while loading embedded object OBJECT
style associated style information All elements but BASE, BASEFONT, HEAD, HTML, META, PARAM, SCRIPT, STYLE, TITLE
summary table's purpose and structure TABLE
tabindex position in tabbing order A, AREA, BUTTON, INPUT, OBJECT, SELECT, TEXTAREA
target render in this document or frame A, AREA, BASE, FORM, LINK
title element's title All elements but BASE, BASEFONT, HEAD, HTML, META, PARAM, SCRIPT, TITLE
type element's content type A, BUTTON, INPUT, LINK, OBJECT, PARAM, SCRIPT, STYLE
usemap use client-side image map IMG, INPUT, OBJECT
valign vertical alignment in cells COL, COLGROUP, TBODY, TD, TFOOT, TH, THEAD, TR
value element's initial value BUTTON, INPUT, OPTION, PARAM
valuetype value's interpretation PARAM
width element's width COL, COLGROUP, IFRAME, IMG, TABLE