javascript 获取浏览器版本_基础知识

function BroswerUtil() {
}
BroswerUtil.prototype = {
    getBrowserVersion: function () {
        var agent = navigator.userAgent.toLowerCase();
        var arr = [];
        var Browser = "";
        var Bversion = "";
        var verinNum = "";
        //IE
        if (agent.indexOf("msie") > 0) {
            var regStr_ie = /msie [\d.]+;/gi;
            Browser = "IE";
            Bversion = "" + agent.match(regStr_ie)
        }
        //firefox
        else if (agent.indexOf("firefox") > 0) {
            var regStr_ff = /firefox\/[\d.]+/gi;
            Browser = "firefox";
            Bversion = "" + agent.match(regStr_ff);
        }
        //Chrome
        else if (agent.indexOf("chrome") > 0) {
            var regStr_chrome = /chrome\/[\d.]+/gi;
            Browser = "chrome";
            Bversion = "" + agent.match(regStr_chrome);
        }
        //Safari
        else if (agent.indexOf("safari") > 0 && agent.indexOf("chrome")             var regStr_saf = /version\/[\d.]+/gi;
            Browser = "safari";
            Bversion = "" + agent.match(regStr_saf);
        }
        //Opera
        else if (agent.indexOf("opera") >= 0) {
            var regStr_opera = /version\/[\d.]+/gi;
            Browser = "opera";
            Bversion = "" + agent.match(regStr_opera);
        } else {
            var browser = navigator.appName;
            if (browser == "Netscape") {
                var version = agent.split(";");
                var trim_Version = version[7].replace(/[ ]/g, "");
                var rvStr = trim_Version.match(/[\d\.]/g).toString();
                var rv = rvStr.replace(/[,]/g, "");
                Bversion = rv;
                Browser = "IE"
            }
        }
        verinNum = (Bversion + "").replace(/[^0-9.]/ig, "");
        arr.push(Browser);
        arr.push(verinNum);
        return arr;
    },
    WB: (function () {
        var UserAgent = navigator.userAgent.toLowerCase();
        alert(UserAgent)
        return {
            isIE6: /msie 6.0/.test(UserAgent), // IE6
            isIE7: /msie 7.0/.test(UserAgent), // IE7
            isIE8: /msie 8.0/.test(UserAgent), // IE8
            isIE9: /msie 9.0/.test(UserAgent), // IE9
            isIE10: /msie 10.0/.test(UserAgent), // IE10
            isIE11: /msie 11.0/.test(UserAgent), // IE11
            isLB: /lbbrowser/.test(UserAgent), // 猎豹浏览器
            isUc: /ucweb/.test(UserAgent), // UC浏览器
            is360: /360se/.test(UserAgent), // 360浏览器
            isBaidu: /bidubrowser/.test(UserAgent), // 百度浏览器
            isSougou: /metasr/.test(UserAgent), // 搜狗浏览器
            isChrome: /chrome/.test(UserAgent.substr(-33, 6)), // Chrome浏览器
            isFirefox: /firefox/.test(UserAgent), // 火狐浏览器
            isOpera: /opera/.test(UserAgent),  // Opera浏览器
            isSafire: /safari/.test(UserAgent) && !/chrome/.test(UserAgent), // safire浏览器
            isQQ:/qqbrowser/.test(UserAgent)//qq浏览器
        };
    })()
}