B.1 Core Attributes
Prior to HTML 4.0, there were few attributes that could be used
consistently for all the HTML
tags. HTML 4.0 changed this, defining a set of 16 core attributes
that can be applied to almost all the elements in both HTML 4.01 and
XHTML 1.0. For brevity, we list these core attributes in this section
and spare you the redundancies in the table that follows:
|
class=name
|
Specify a style class controlling the appearance of the
tag's contents
|
|
dir=dir
|
Specify the rendering direction for text — either left to right
(ltr) or right to left (rtl)
|
|
id=name
|
Define a reference name for the tag that is unique in the document
|
|
lang=language
|
Specify the human language for the tag's contents
with an ISO 639 standard two-character name and optional dialect
subcode
|
|
onclick=applet
|
Specify an applet to be executed when the user clicks the mouse on
the tag's content display area
|
|
ondblclick=applet
|
Specify an applet to be executed when the user double-clicks the
mouse button on the tag's content display area
|
|
onkeydown=applet
|
Specify an applet to be executed when the user presses down on a key
while the tag's contents have input focus
|
|
onkeypress=applet
|
Specify an applet to be executed when the user presses and releases a
key while the tag's contents have focus
|
|
onkeyup=applet
|
Specify an applet to be executed when the user releases a pressed key
while the tag's contents have focus
|
|
onmousedown=applet
|
Specify an applet to be executed when the user presses down on the
mouse button while pointing to the tag's content
display area
|
|
onmousemove=applet
|
Specify an applet to be executed when the user moves the mouse in the
tag's content display area
|
|
onmouseout=applet
|
Specify an applet to be executed when the user moves the mouse off
the tag's content display area
|
|
onmouseover=applet
|
Specify an applet to be executed when the user moves the mouse into
the tag's content display area
|
|
onmouseup=applet
|
Specify an applet to be executed when the user releases the mouse
button while in the tag's content display area
|
|
style=style
|
Specify an inline style for the tag
|
|
title=string
|
Specify a title for the tag
|
Only a small handful of tags accept none or only some, but not all,
of these attributes. They are:
|
<applet>
|
<base>
|
<basefont>
|
|
<bdo>
|
<br>
|
<comment>
|
|
<embed>
|
<font>
|
<frame>
|
|
<frameset>
|
<head>
|
<hr>
|
|
<html>
|
<iframe>
|
<ilayer>
|
|
<isindex>
|
<keygen>
|
<layer>
|
|
<marquee>
|
<meta>
|
<multicol>
|
|
<nextid>
|
<nobr>
|
<noembed>
|
|
<param>
|
<script>
|
<server>
|
|
<spacer>
|
<style>
|
<title>
|
|
<wbr>
|
|
|
For convenience, we've marked each of these tags
with an asterisk (*) in the following table, and we list all of the
attributes supported by these special tags, including the common
ones. For all other tags (those without an asterisk), assume that the
common attributes listed above apply. Do note, however, that the
popular browsers do not support all of the HTML
4.0 standard attributes, common or not. Please refer to the main text
for details.
|
