function getBrowser(){
var userAgent = navigator.userAgent,
rMsie = /(msie\s|trident.*rv:)([\w.]+)/,
rFirefox = /(firefox)\/([\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 = 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;
}
判断浏览器类型
原文：http://www.cnblogs.com/yulei126/p/6786143.html
