html标题：<h1>到<h6>
段落：<p>
链接：<a href="http://www.w3schools.com/">Visit W3Schools</a>
图片：<img>
formatting output：<b>, <i>
列表List：<ul>, <ol> description list： <dl><dt>
forms: 用来向服务器端发送数据有text fields, password, checkbox, radio button, submit button
html entity：< < > > 等
HTML Basic Document
<!DOCTYPE html> <html> <head> <title>Title of document goes here</title> </head> <body> Visible text goes here... </body> </html>
Basic Tags
<h1>Largest Heading</h1> <h2> . . . </h2> <h3> . . . </h3> <h4> . . . </h4> <h5> . . . </h5> <h6>Smallest Heading</h6> <p>This is a paragraph.</p> <br> (line break) <hr> (horizontal rule) <!-- This is a comment -->
Formatting
<b>Bold text</b> <code>Computer code</code> <em>Emphasized text</em> <i>Italic text</i> <kbd>Keyboard input</kbd> <pre>Preformatted text</pre> <small>Smaller text</small> <strong>Important text</strong> <abbr> (abbreviation) <address> (contact information) <bdo> (text direction) <blockquote> (a section quoted from another source) <cite> (title of a work) <del> (deleted text) <ins> (inserted text) <sub> (subscripted text) <sup> (superscripted text)
Links
Ordinary link: <a href="http://www.example.com/">Link-text goes here</a> Image-link: <a href="http://www.example.com/"><img src="URL" alt="Alternate Text"></a> Mailto link: <a href="mailto:webmaster@example.com">Send e-mail</a> <!-- Bookmark:--> <a id="tips">Tips Section</a> <a href="#tips">Jump to the Tips Section</a>
Images
<img src="URL" alt="Alternate Text" height="42" width="42">
Styles/Sections
<style type="text/css"> h1 {color:red;} p {color:blue;} </style> <div>A block-level section in a document</div> <span>An inline section in a document</span>
Unordered list
<ul> <li>Item</li> <li>Item</li> </ul>
Ordered list
<ol> <li>First item</li> <li>Second item</li> </ol>
Definition list
<dl> <dt>Item 1</dt> <dd>Describe item 1</dd> <dt>Item 2</dt> <dd>Describe item 2</dd> </dl>
Tables
<table border="1"> <tr> <th>table header</th> <th>table header</th> </tr> <tr> <td>table data</td> <td>table data</td> </tr> </table>
Iframe
<iframe src="demo_iframe.htm"></iframe>
Forms
<form action="demo_form.asp" method="post/get"> <input type="text" name="email" size="40" maxlength="50"> <input type="password"> <input type="checkbox" checked="checked"> <input type="radio" checked="checked"> <input type="submit" value="Send"> <input type="reset"> <input type="hidden"> <select> <option>Apples</option> <option selected="selected">Bananas</option> <option>Cherries</option> </select> <textarea name="comment" rows="60" cols="20"></textarea> </form>
Entities
< is the same as <
> is the same as >
© is the same as ©
Source : http://www.w3schools.com/html/html_quick.asp