HTML..XHTML.The.Definitive.Guide..5th.Ed.1002002 [Electronic resources] نسخه متنی

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HTML..XHTML.The.Definitive.Guide..5th.Ed.1002002 [Electronic resources] - نسخه متنی

Chuck Musciano, Bill Kennedy

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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.


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