JS代码判断浏览器类型以及版本

browserVersion:function(){
var explorer = window.navigator.userAgent;
if (explorer.indexOf("MSIE") >= 0) {// ie10及以下
var b_version = navigator.appVersion;
var version = b_version.split(";");
version = version[1].replace(/[ ]/g, "");
version = version.split('MSIE')[1];
browser = 'IE:' + version;
} else if (explorer.indexOf("Firefox") >= 0) {// Firefox
browser = 'Firefox';
} else if (explorer.indexOf("Chrome") >= 0) {// Chrome
browser = 'Chrome';
} else if (explorer.indexOf("Opera") >= 0) {// Opera
browser = 'Opera';
} else if (explorer.indexOf("Safari") >= 0) {// Safari
browser = 'Safari';
} else if (explorer.indexOf("Trident/7.0") >= 0) {// IE11
browser = 'IE:10.0以上';
}
return borwser;
}