针对IE提示

<script type="text/javascript">
    (function (window) {
        var theUA = window.navigator.userAgent.toLowerCase();
        if ((theUA.match(/msie\s\d+/) && theUA.match(/msie\s\d+/)[0]) || (theUA.match(/trident\s?\d+/) && theUA.match(/trident\s?\d+/)[0])) {
            var ieVersion = theUA.match(/msie\s\d+/)[0].match(/\d+/)[0] || theUA.match(/trident\s?\d+/)[0];
            if (ieVersion < 9) {
                var str = "你的浏览器版本太low了!";
                var str2 = "<h4>推荐使用:<a href=‘https://www.baidu.com/s?ie=UTF-8&wd=%E8%B0%B7%E6%AD%8C%E6%B5%8F%E8%A7%88%E5%99%A8‘ target=‘_blank‘ style=‘color:#cc0‘>谷歌</a>,"
                    + "<a href=‘https://www.baidu.com/s?ie=UTF-8&wd=%E7%81%AB%E7%8B%90%E6%B5%8F%E8%A7%88%E5%99%A8‘ target=‘_blank‘ style=‘color:#cc0‘>火狐</a>其他双核急速模式 </h4>";
                document.writeln("<pre style=‘text-align:center;color:#fff; height:100%;border:0;position:fixed;top:0;left:0;width:100%;z-index:99999999‘>" +
                    "<h2 style=‘padding-top:200px;margin:0‘><strong>" + str + "<br/></strong></h2><p>" +
                    str2 + "</p><h2 style=‘margin:0‘><strong>如果你的使用的是双核浏览器,请切换到极速模式访问<br/></strong></h2></pre>");
                document.execCommand("Stop");
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