js分辨浏览器类别和版本

function BrowserInfo() {

var ua = navigator.userAgent.toLowerCase();

var Sys = {};

var s;

(s = ua.match(/msie ([\d.]+)/)) ? Sys.ie = s[1] : (s = ua

.match(/Trident\/(\d+)/i)) ? Sys.ie11 = s[1] : (s = ua

.match(/edge.([\d.]+)/)) ? Sys.edge = s[1] : (s = ua

.match(/opera.([\d.]+)/)) ? Sys.opera = s[1] : (s = ua

.match(/opr.([\d.]+)/)) ? Sys.opera = s[1] : (s = ua

.match(/firefox\/([\d.]+)/)) ? Sys.firefox = s[1] : (s = ua

.match(/chrome\/([\d.]+)/)) ? Sys.chrome = s[1] : (s = ua

.match(/version\/([\d.]+).*safari/)) ? Sys.safari = s[1] : 0;

var mBrowserInfo = {};

if (Sys.ie) {

mBrowserInfo.name = "IE";

mBrowserInfo.version =  parseInt(Sys.ie);

} else if (Sys.ie11) {

mBrowserInfo.name = "IE";

mBrowserInfo.version = 11;

} else if (Sys.firefox) {

mBrowserInfo.name = "Firefox";

mBrowserInfo.version = Sys.firefox;

} else if (Sys.chrome) {

mBrowserInfo.name = "Chrome";

mBrowserInfo.version = Sys.chrome;

} else if (Sys.opera) {

mBrowserInfo.name = "Opera";

mBrowserInfo.version = Sys.opera;

} else if (Sys.safari) {

mBrowserInfo.name = "Safari";

mBrowserInfo.version = Sys.safari;

} else if (Sys.edge) {

mBrowserInfo.name = "Edge";

mBrowserInfo.version = Sys.edge;

} else {

//默认Chrome

mBrowserInfo.name = "Chrome";

mBrowserInfo.version = 0;

}

return  mBrowserInfo;

}