转载 js判断浏览器

$scope.identifyBrowser= function () {
var userAgent = navigator.userAgent,
rMsie = /(msie\s|trident.*rv:)([\w.]+)/,
rFirefox = /(firefox)\/([\w.]+)/,
rOpera = /(opera).+version\/([\w.]+)/,
rChrome = /(chrome)\/([\w.]+)/,
rSafari = /version\/([\w.]+).*(safari)/;
var browser;
var version;
var ua = userAgent.toLowerCase();

function uaMatch(ua) {
var match = rMsie.exec(ua);
if (match != null) {
return { browser: "IE", version: match[2] || "0" };
}
var match = rFirefox.exec(ua);
if (match != null) {
return { browser: match[1] || "", version: match[2] || "0" };
}
var match = rOpera.exec(ua);
if (match != null) {
return { browser: match[1] || "", version: match[2] || "0" };
}
var match = rChrome.exec(ua);
if (match != null) {
return { browser: match[1] || "", version: match[2] || "0" };
}
var match = rSafari.exec(ua);
if (match != null) {
return { browser: match[2] || "", version: match[1] || "0" };
}
if (match != null) {
return { browser: "", version: "0" };
}
}
var browserMatch = uaMatch(userAgent.toLowerCase());
if (browserMatch.browser) {
browser = browserMatch.browser;
version = browserMatch.version;
}
return {
"browser": browser ,
"version": version
};
}

//判断当前页面时否在在IE浏览器下运行
$scope.joinConf= function () {
var temp = $scope.identifyBrowser();
if (temp.browser == "IE") {
if (!$scope.initActivxObj()) {
}

} else {
alert("请选用IE浏览器!");
}
}