more tags HTML
[issue link]how to specify the more HTML tags?
example
<!DOCTYPE html>
<!--[if IE 7]>
<html class="ie ie7" lang="en-US">
<![endif]-->
<!--[if IE 8]>
<html class="ie ie8" lang="en-US">
<![endif]-->
<!--[if !(IE 7) | !(IE 8) ]><!-->
<!-- BEGIN html -->
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
<!--<![endif]-->