<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN" “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="zh-CN" xml:lang="zh-CN"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <meta name="author" content="ChenYu"> <meta name="keywords" content="xx,xx,xx"> <meta name="description" content="xxxx"> <script type="text/javascript" src=""></script> <link rel="stylesheet" type="text/css" href=""> <title>xxxx</title> </head> <html/>
<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="utf-8"> <meta name="author" content="ChenYu"> <meta name="keywords" content="xx,xx,xx"> <meta name="description" content="xxxx"> <!--[if lt IE 7 ]><html class="ie6"><![endif]-->
<!--[if IE 7 ]><html class="ie7"><![endif]-->
<!--[if IE 8 ]><html class="ie8"><![endif]-->
<!--[if IE 9 ]><html class="ie9"><![endif]-->
<!--[if (gt IE 9)|!(IE)]><html><![endif]-->
<!--STATUS OK-->
<script type="text/javascript" src=""></script> <link rel="stylesheet" href=""> <title>xxxx</title> </head> <html/>
原文：https://www.cnblogs.com/JDotNet/p/3458564.html