IE9之前的版本兼容HTML5标签 <!--[if lt IE 9]> <script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script><![endif]-->
?html5.js代码在附件里
?
html5.js官方网站地址：
https://code.google.com/p/html5shim/
https://github.com/aFarkas/html5shiv
