如何修改DNN默认的DOCTYPE

DNN 默认的DOCTYPE在IE 6.0下会触发IE进入quirks模式(会有什么影响），那如何修改DNN的DOCTYPE呢？Cathal Connolly 给出了一个解决方案

原文：
Whilstthe 4.4 release predominantly focussed on performance and optimisation,there were a number of other enhancements added to the release (asalways the changelogis the best place to view changes). One of these, that should be ofinterest to skinners and those interested in accessibility standards& xhtml compliance, is support for skin level doctypes .

Historically, if you wanted to target your skin/container for aparticular version of html/xhtml, you had to manually edit thedefault.aspx page to alter the hardcoded DOCTYPE declaration. With 4.4,the declaration has been made dynamic, to allow users to declareparticular doctypes with particular skins. To make use of this, youcreate a file with the same name as your skin except ending indoctype. (rather than ascx/htm/html) and it’ll be picked up duringskin load. This file should contain a single node,SkinDocType, thatcontains a declaration of your desired doctype. To ensure that theparser reads the value correctly, you need to use a CDATA section toescape out the various < and & characters e.g. If I have a skincalled mypage.asx that I intended to render as XHTML 1.0 strict, then Iwould create a file called mypage.doctype.  which would  contain thefollowing:

<SkinDocType><![CDATA[<!DOCTYPE XHTML 1.0 Strict//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">]]></SkinDocType>

对此John Mitchell认为这个解决方案不灵活，每次页面加载的 解析会降低效率，他提出的解决方案如下：

原文：
Brand new in DNN 4.4 is the option to change your Doctype  which Cathal blogged about.

As Cathal pointed out in this thread theimplementation will need to be improved for performance because onevery request the DNN work is looking for an file and loadingit into an Document to validate the .

There is also concern that it is hard to implement with multipleskins because you would need a different file for every Skin.

You can shortcut all of this now and not take the performance hit by using the code below.

Just copy and paste the following code directly into your HTML or .ASCX skin file.

时间有限，就不翻译了，贴出来供大家参考。