让IE8兼容IE7

三

2009

发布者: seasun

你的网站添加X-UA-Compatible meta标签了吗？
文章来自: 淘友淘网(http://www.tao6tao.com)
细心的朋友会发现不少网站的html代码中多了一个<meta http-equiv=”X-UA-Compatible” content=”IE=EmulateIE7″ />标签！

<title>淘友淘网 – 河南地区金牌二手市场</title>
<meta http-equiv=”Content-Type” content=”text/html; charset=gb2312″ />
<meta http-equiv=”Content-Language” content=”gb2312″ />
<meta http-equiv=”X-UA-Compatible” content=”IE=EmulateIE7″ />
<meta name=”robots” content=”all” />
<meta name=”googlebot” content=”all” />
<meta name=”description” content=”淘友淘网 tao6tao.com – 河南二手市场淘友的幸福生活河南二手交易平台二手市场开心淘宝淘又淘开心游戏” />
<meta name=”keywords” content=”淘友淘网 tao6tao.com 河南二手市场河南二手交易平台二手市场二手开心淘宝淘又淘开心游戏” />
<meta name=”copyright” content=”www.tao6tao.com” />

那这个标签是什么意思呢？让我来看下msdn上的说明：
In IE8 Beta 1, that option is the “IE=7” X-UA-Compatible tag, which instructs IE8 to display content in IE7 Standards mode. However, the scenario this doesn’t address is when IE=7 is applied as an HTTP header to a site that contains Quirks mode pages. The IE=7 HTTP header will force all pages – both Quirks and Standards – to display in IE7 Standards mode. Developers using this header while updating their sites would then have to add the “IE=5” <META> tag to each page they want to keep in Quirks mode. This logic is fine for many websites. However, if a site has lots of Quirks mode pages, or for the case where pages with frames host a mix of Strict and Quirks mode content – as brought to light by IE8 Beta 1 user feedback – the compatibility opt-out adds a bit more work than we intended.

X-UA-Compatible是针对ie8新加的一个设置，对于ie8之外的浏览器是不识别的，这个区别与content=”IE=7″在无论页面是否包含<!DOCTYPE>指令，都像是使用了 Windows Internet Explorer 7的标准模式。而content=”IE=EmulateIE7″模式遵循<!DOCTYPE>指令。对于多数网站来说，它是首选的兼容性模式。

目前IE8尚在测试版中，所以为了避免制作出的页面在IE8下面出现错误，建议直接将IE8使用IE7进行渲染。也就是直接在页面的header的meta标签中加入如下代码：
<meta http-equiv=”X-UA-Compatible” content=”IE=7″ />
这样我们才能使得页面在IE8里面表现正常！