2.11.3 address元素和网页编排规则
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<address>
<a href="#">iwen</a>
<a href="#">ime</a>
</address>
<footer>
<div>
<address>
<a href="#">iwen</a>
极客学院，嘉华大厦
</address>
<time datetime="2018-07-04">2018-07-04</time>
</div>
</footer>
</body>
</html><!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>网页编排实例</title>
</head>
<body>
<header>
<h1>网页标题</h1>
<nav>
<ul>
<li><a href="#">首页</a></li>
<li><a href="#">帮助</a></li>
</ul>
</nav>
</header>
<article>
<hgroup>
<h1>文章主标题</h1>
<h2>文章子标题</h2>
</hgroup>
<p>文章正文</p>
<section>
<div>
<article>
<h1>评论标题</h1>
<p>评论正文</p>
</article>
</div>
</section>
</article>
<footer>
<small>版权所有：.....</small>
</footer>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form id="testform">
<input type="text">
</form>
<textarea form="testform"></textarea>
</body>
</html>2.12.2 formmethod属性与formenctype属性
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form id="testform">
<input type="submit" name="s1" value="v1" formmethod="post" formaction="xx.jsp">提交
<input type="submit" name="s2" value="v2" formmethod="get" formaction="xx.jsp">提交
</form>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form>
<input type="text" formenctype="text/plain"> <!--将空格转换为 "+" 符号，但不编码特殊字符。-->
<input type="text" formenctype="multipart/form-data"> <!--不对字符编码。当使用有文件上传控件的表单时，该值是必需的。-->
<input type="text" formenctype="application/x-www-form-urlencoded"> <!--在发送前对所有字符进行编码（默认）。-->
</form>
</body>
</html>2.12.3 formtarget属性与autofocus属性
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form>
<input type="text" autofocus>
<input type="text">
</form>
</body>
</html>2.12.3 required属性与labels属性