JavaScript

Since some older text browsers and screen readers are unable to read JavaScript, nonscript alternatives must be put into a No Script tag. This will also benefit users who turn off JavaScript to reduce distraction or for security concerns.

Code Example:

<map name="m_fwnavbar">
<area shape="rect" coords="0,0,75,25"
href="../Pages/Introduction.html"
title="Introduction to designing accessible websites"
alt="Introduction to designing accessible websites"
onmouseout="MM_startTimeout();"
onmouseover="MM_showMenu
	(window.mm_menu_0219123232_0,0,0,null,'fwnavbar');" >
</area>
</map>

<noscript>
<ul>
<li><a href="introduction.html"
	title="The need for website accessibility">
	Introduction</a></li>
<li><a href="basic.html"
	title="Basic accessibility facts">
	The Basics</a></li>
<li><a href="disabilities.html"
	title="Disabilities and website use">
	Disabilities</a></li>
<li><a href="structure.html"
	title="Making webpage structure accessible">
	Structure</a></li>
</ul>
</noscript>

It is sometimes suggested that script for "onFocus" and "onBlur" be provided in addition to "onMouseOver" and "onMouseOut" so that tab based navigation can trigger JavaScript actions.

<area shape="rect" coords="0,0,75,25"
href="../Pages/Introduction.html"
title="Introduction to designing accessible websites"
alt="Introduction to designing accessible websites"
onblur="MM_startTimeout();"
onmouseout="MM_startTimeout();"
onmouseover="MM_showMenu
(window.mm_menu_0219123232_0,0,0,null,'fwnavbar');"
onfocus="MM_showMenu
(window.mm_menu_0219123232_0,0,0,null,'fwnavbar');" >
</area>

Browsers

Both Internet Explorer and Netscape Navigator recognize the No Script tag. Internet Explorer recognizes OnFocus and OnBlur, but Netscape Navigator does not.