to make nonessential alerts optional</a></li>	
	</ul>

			</section>
			<section id="failure">
				<h3>Failure</h3>
				<ul>
				<li>Using <code>role="alert"</code> or <code>aria-live="assertive"</code> on content which is not important and time-sensitive (future link)</li>
				<li>Using a <code>visibilitychange</code> event to hide or display a document without switching the document's live regions between active and inactive (future link)</li>
			</ul>
			</section>
		</section>
	</body>
</html>	
