HTML 基本语法

文本标记语言，即HTML（Hypertext Markup Language），是用于描述网页文档的一种标记语言。

一个网页对应于一个HTML文件，HTML文件以.htm或.html为扩展名。可以使用任何能够生成TXT类型源文件的文本编辑来产生HTML文件。超文本标记语言标准的HTML文件都具有一个基本的整体结构，即HTML文件的开头与结尾标志和HTML的头部与实体2大部分。有3个双标记符用于页面整体结构的确认。

HTML Basic Document

<html>
<head>
<title>Document name goes here</title>
</head>
<body>
Visible text goes here
</body>
</html>

Text Elements

<p>This is a paragraph</p>
<br> (line break)
<hr> (horizontal rule)
<pre>This text is preformatted</pre>

Logical Styles

<em>This text is emphasized</em>
<strong>This text is strong</strong>
<code>This is some computer code</code>

Physical Styles

<b>This text is bold</b>
<i>This text is italic</i>

Links, Anchors, and Image Elements

<a href="http://www.example.com/">This is a Link</a>
<a href="http://www.example.com/"><img src="URL"
alt="Alternate Text"></a>
<a href="mailto:webmaster@example.com">Send e-mail</a>A named anchor:
<a name="tips">Useful Tips Section</a>
<a href="#tips">Jump to the Useful Tips Section</a>

Unordered list

<ul>
<li>First item</li>
<li>Next item</li>
</ul>

Ordered list

<ol>
<li>First item</li>
<li>Next item</li>
</ol>

Definition list

<dl>
<dt>First term</dt>
<dd>Definition</dd>
<dt>Next term</dt>
<dd>Definition</dd>
</dl>

Tables

<table border="1">
<tr>
  <th>someheader</th>
  <th>someheader</th>
</tr>
<tr>
  <td>sometext</td>
  <td>sometext</td>
</tr>
</table>

Frames

<frameset cols="25%,75%">
  <frame src="page1.htm">
  <frame src="page2.htm">
</frameset>

Forms

<form action="http://www.example.com/test.asp" method="post/get">
<input type="text" name="lastname"
value="Nixon" size="30" maxlength="50">
<input type="password">
<input type="checkbox" checked="checked">
<input type="radio" checked="checked">
<input type="submit">
<input type="reset">
<input type="hidden">
<select>
<option>Apples
<option selected>Bananas
<option>Cherries
</select>
<textarea name="Comment" rows="60"
cols="20"></textarea>
</form>

Entities

&lt; is the same as <
&gt; is the same as >
&#169; is the same as ©

Other Elements

<!-- This is a comment -->
<blockquote>
Text quoted from some source.
</blockquote>
<address>
Address 1<br>
Address 2<br>
City<br>
</address>