判断浏览器的版本，出现低版本提示

var BrowserVision = {
    Get: function () {
        /// <summary>
        ///    获取浏览器名称及版本
        /// </summary>
        /// <returns type="String"/>
        var agent = navigator.userAgent;
        var browser = "";
        var version = "";
        if (/MSIE/.test(agent)) {
            browser = "IE";
            var reg_match = agent.match(/MSIE[wW]+;/)[0];
            reg_match = reg_match.split(";")[0];
            version = reg_match.split(" ")[1];
        }
        else if (/Trident/.test(agent) && /rv:11.0/.test(agent)) {
            browser = "IE";
            version = "11.0"
        }
        else if (/Safari/.test(agent) && !(/Chrome/.test(agent)) && !(/Edge/.test(agent))) {
            var reg_match = agent.match(/Safari/[wW]+$/)[0];
            browser = "Safari";
            version = reg_match.split("/")[1];
        }
        else if (/Safari/.test(agent) && /Chrome/.test(agent) && !(/Edge/.test(agent))) {
            var reg_match = agent.match(/Chrome/[wW]+s/)[0];
            browser = "Chrome";
            version = reg_match.split("/")[1];
        }
        else if (/Safari/.test(agent) && /Edge/.test(agent)) {
            var reg_match = agent.match(/Edge/[wW]+$/)[0];
            browser = "Edge";
            version = reg_match.split("/")[1];
        }
        else {
            browser = "Unknow";
            version = "0";
        }
        return browser + "," + version;
    },
    IsIE: function () {
        /// <summary>
        ///    判定是否为IE
        ///    &#10;--是返回1，否则返回0
        /// </summary>
        /// <returns type="int"/>
        var agent = navigator.userAgent;
        if (/MSIE/.test(agent) || (/Trident/.test(agent) && /rv:11.0/.test(agent))) {
            return 1;
        }
        else {
            return 0;
        }
    },
    IELowerThan: function (version) {
        /// <summary>
        ///    判定IE是否小于指定版本
        ///    &#10;--是返回1
        ///    &#10;--不小于指定版本返回0；不是IE返回0；错误的参数返回0
        /// </summary>
        /// <param type="float" name="version">
        ///   版本号
        /// </param>
        /// <returns type="int"/>
        if (version != undefined && !isNaN(version)) {
            var browser = BrowserVision.Get();
            if (/IE/.test(browser)) {
                var brow_ver = parseFloat(browser.split(",")[1]);
                var version = parseFloat(version);
                if (brow_ver < version) {
                    return 1;
                }
                else {
                    return 0;
                }
            }
            else {
                return 0;
            }
        }
        else {
            return 0;
        }
    }
}

以上是一些了的浏览器版本判断的逻辑，然后我们只需要调用一下 if (BrowserVision.IELowerThan(8)) {

低版本浏览器的操作。我是用了两个兄弟级div包含正常内容和提示内容，通过div的显隐达到效果
               // $(".js-content").hide();
              //  $(".js-update").show();
            }