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

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html5.js官方网站地址：

https://code.google.com/p/html5shim/

https://github.com/aFarkas/html5shiv

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