JavaScript 浏览器版本判定

 

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function BrowserType()  {    var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串    var isOpera = userAgent.indexOf("Opera") > -1; //判断是否Opera浏览器    // var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera; //判断是否IE浏览器    var isIE=window.ActiveXObject || "ActiveXObject" in window    // var isEdge = userAgent.indexOf("Windows NT 6.1; Trident/7.0;") > -1 && !isIE; //判断是否IE的Edge浏览器    var isEdge = userAgent.indexOf("Edge") > -1; //判断是否IE的Edge浏览器    var isFF = userAgent.indexOf("Firefox") > -1; //判断是否Firefox浏览器    var isSafari = userAgent.indexOf("Safari") > -1 && userAgent.indexOf("Chrome") == -1; //判断是否Safari浏览器    var isChrome = userAgent.indexOf("Chrome") > -1 && userAgent.indexOf("Safari") > -1&&!isEdge; //判断Chrome浏览器        if (isIE)     {       var reIE = new RegExp("MSIE (\\d+\\.\\d+);");       reIE.test(userAgent);       var fIEVersion = parseFloat(RegExp["$1"]);       if(userAgent.indexOf('MSIE 6.0')!=-1){         return "IE6";       }else if(fIEVersion == 7)         { return "IE7";}       else if(fIEVersion == 8)         { return "IE8";}       else if(fIEVersion == 9)         { return "IE9";}       else if(fIEVersion == 10)         { return "IE10";}       else if(userAgent.toLowerCase().match(/rv:([\d.]+)\) like gecko/)){             return "IE11";         }       else         { return "0"}//IE版本过低     }//isIE end             if (isFF) { return "FF";}     if (isOpera) { return "Opera";}     if (isSafari) { return "Safari";}     if (isChrome) { return "Chrome";}     if (isEdge) { return "Edge";}   }//myBrowser() end      alert(BrowserType());