火狐对IE6,IE7用户的态度值得学习

http://i.firefoxchina.cn/html/badbrowser.html

<script>var userAgent = navigator.userAgent,agentReg = /MSIE [67].d/,isIELowerVersion = agentReg.test(userAgent);if(isIELowerVersion){window.location.href = "html/badbrowser.html";}</script>

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原文地址：https://www.cnblogs.com/dingyuanxin/p/3949616.html