HTML advanced knowledge
本篇文章主要介绍HTML进阶知识，感兴趣的朋友参考下，希望对大家有所帮助。
文档类型
HTML5 <!DOCTYPE html>
<head>元素
<title> 元素在所有 HTML/XHTML 文档中都是必需的。
title 元素能够：
定义浏览器工具栏中的标题
提供页面被添加到收藏夹时显示的标题
显示在搜索引擎结果中的页面标题
<base> 标签为页面上的所有链接规定默认地址或默认目标（target）
<base target="_blank" />
<link> 标签最常用于连接样式表：
<head><link rel="stylesheet" type="text/css" href="mystyle.css" /></head>
<meta>元素
<meta> 标签始终位于 head 元素中。
元数据可用于浏览器（如何显示内容或重新加载页面），搜索引擎（关键词），或其他 web 服务。
下面的 meta 元素定义页面的描述：
<meta name="description" content="Free Web tutorials on HTML, CSS, XML" />
下面的 meta 元素定义页面的关键词：
<meta name="keywords" content="HTML, CSS, XML" />
定期刷新：
<head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <meta http-equiv="Refresh" content="5;url=http://www.php.cn" /> </head>
HTML字符实体
&entity_name;或者&#entity_number;
实体名称对大小写敏感（<p>&pound</p>）
| 显示结果 | 描述 | 实体名称 | 实体编号 |
|---|---|---|---|
| 空格 | |
  |
|
| < | 小于号 | &lt; | &#60; |
| > | 大于号 | &gt; |
&#62; |
| & | 和号 | & |
& |
| “ | 引号 | " |
" |
| ‘ | 撇号 | '(IE不支持) |
' |
| ￠ | 分 | ¢ |
¢ |
| £ | 镑 | £ |
£ |
| ¥ | 日圆 | ¥ |
¥ |
| € | 欧元 | € |
€ |
| § | 小节 | § |
§ |
| © | 版权 | © |
© |
| ® | 注册商标 | ® |
® |
| ™ | 商标 | ™ |
™ |
| × | 乘号 | × |
× |
| ÷ | 除号 | &pide; |
÷ |
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