判断浏览器是否低于指定版本号，若低于，则提示浏览器版本过低，更新浏览器页面...

(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 < 11) {
            var str = "你的浏览器版本太low了,已经和时代脱轨了 :(";
            var str2 = "推荐使用:谷歌,"
                + "火狐,"
                + "其他双核极速模式";
            document.writeln("
" +
                "
" + str + "
" +
                str2 + "
如果你的使用的是双核浏览器,请切换到极速模式访问
");
            document.execCommand("Stop");
	    window.location.href = '12.html';
        };
    }
})(window);

 

转载于:https://www.cnblogs.com/dyy-dida/p/9590182.html