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XHTML 笔记

XHTMLXMLHTMLAccessGo 
阅读更多
原文出自 http://www.w3schools.com 中的 XHTML 教程


XHTML 结合 HTML 和 XML。

XHTML 元素必须严格的嵌套。
XHTML 元素必须总是闭合的。
XHTML 元素必须是小写的。XHTML 文档必须有根元素。

所有的 XHTML 文档必须有 DOCTYPE 声明。
DOCTYPE 声明必须是 XHTML 文档的第一行。

有 3 种文档类型定义： STRICT TRANSITIONAL FRAMESET
xml 代码
 
  1. <!DOCTYPE html PUBLIC  
  2. "-//W3C//DTD XHTML 1.0 Strict//EN"   
  3. "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">  
  4.   
  5. <!DOCTYPE html PUBLIC  
  6. "-//W3C//DTD XHTML 1.0 Transitional//EN"  
  7. "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  8.   
  9. <!DOCTYPE html PUBLIC  
  10. "-//W3C//DTD XHTML 1.0 Frameset//EN"  
  11. "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">  



属性名称必须小写。
属性值必须用引号。
属性最简化被禁止。 如，
xml 代码
  1. <input type="checkbox" checked />

id 属性代替 name 属性。
单标签在末尾 / 之前有空格。 例如：
xml 代码
  1. <br />


XHTML 文档由三个主要的部分构成： DOCTYPE Head Body。
基本文档结构如下：
xml 代码
 
  1. <!DOCTYPE ...>  
  2. <html>  
  3. <head>  
  4. <title>... </title>  
  5. </head>  
  6. <body> ... </body>  
  7. </html>  


核心属性（不可用于 base， head， html， meta， param， script， style， 和 title 元素）
Attribute Value Description
class class_rule or style_rule The class of the element
id id_name A unique id for the element
style style_definition An inline style definition
title tooltip_text A text to display in a tool tip

语言属性（不可用于 base， br， frame， frameset， hr， iframe， param， 和 script 元素）
Attribute Value Description
dir ltr | rtl Sets the text direction
lang language_code Sets the language code

键盘属性
Attribute Value Description
accesskey character Sets a keyboard shortcut to access an element
tabindex number Sets the tab order of an element

窗体事件（只有 body 和 frameset 元素可用）
Attribute Value Description
onload script Script to be run when a document loads
onunload script Script to be run when a document unloads

表单元素事件（只在表单元素中有效）
Attribute Value Description
onchange script Script to be run when the element changes
onsubmit script Script to be run when the form is submitted
onreset script Script to be run when the form is reset
onselect script Script to be run when the element is selected
onblur script Script to be run when the element loses focus
onfocus script Script to be run when the element gets focus

键盘事件（不可用于 base， bdo， br， frame， frameset， head， html， iframe， meta， param， script， style， 和 title 元素）
Attribute Value Description
onkeydown script What to do when key is pressed
onkeypress script What to do when key is pressed and released
onkeyup script What to do when key is released

鼠标事件（不可用于 base， bdo， br， frame， frameset， head， html， iframe， meta， param， script， style， 和 title 元素）
Attribute Value Description
onclick script What to do on a mouse click
ondblclick script What to do on a mouse doubleclick
onmousedown script What to do when mouse button is pressed
onmousemove script What to do when mouse pointer moves
onmouseover script What to do when mouse pointer moves over an element
onmouseout script What to do when mouse pointer moves out of an element
onmouseup script What to do when mouse button is released

HTTP 响应信息：

1xx: Information

Message: Description:
100 Continue Only a part of the request has been received by the server, but as long as it has not been rejected, the client should continue with the request
101 Switching Protocols The server switches protocol

2xx: Successful

Message: Description:
200 OK The request is OK
201 Created The request is complete, and a new resource is created
202 Accepted The request is accepted for processing, but the processing is not complete
203 Non-authoritative Information  
204 No Content  
205 Reset Content  
206 Partial Content  

3xx: Redirection

Message: Description:
300 Multiple Choices A link list. The user can select a link and go to that location. Maximum five addresses
301 Moved Permanently The requested page has moved to a new url
302 Found The requested page has moved temporarily to a new url
303 See Other The requested page can be found under a different url
304 Not Modified  
305 Use Proxy  
306 Unused This code was used in a previous version. It is no longer used, but the code is reserved
307 Temporary Redirect The requested page has moved temporarily to a new url

4xx: Client Error

Message: Description:
400 Bad Request The server did not understand the request
401 Unauthorized The requested page needs a username and a password
402 Payment Required You can not use this code yet
403 Forbidden Access is forbidden to the requested page
404 Not Found The server can not find the requested page
405 Method Not Allowed The method specified in the request is not allowed
406 Not Acceptable The server can only generate a response that is not accepted by the client
407 Proxy Authentication Required You must authenticate with a proxy server before this request can be served
408 Request Timeout The request took longer than the server was prepared to wait
409 Conflict The request could not be completed because of a conflict
410 Gone The requested page is no longer available
411 Length Required The "Content-Length" is not defined. The server will not accept the request without it
412 Precondition Failed The precondition given in the request evaluated to false by the server
413 Request Entity Too Large The server will not accept the request, because the request entity is too large
414 Request-url Too Long The server will not accept the request, because the url is too long. Occurs when you convert a "post" request to a "get" request with a long query information
415 Unsupported Media Type The server will not accept the request, because the media type is not supported
416  
417 Expectation Failed  

5xx: Server Error

Message: Description:
500 Internal Server Error The request was not completed. The server met an unexpected condition
501 Not Implemented The request was not completed. The server did not support the functionality required
502 Bad Gateway The request was not completed. The server received an invalid response from the upstream server
503 Service Unavailable The request was not completed. The server is temporarily overloading or down
504 Gateway Timeout The gateway has timed out
505 HTTP Version Not Supported The server does not support the "http protocol" version
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