Navigator对象
Navigator对象包含有关浏览器的信息。虽然没有应用于Navigator对象的公开标准，不过，所有浏览器都支持该对象。
appCodeName 与浏览器相关的内部代码名
appMinorVersion 辅版本号
appName 浏览器的正式名称
appVersion 浏览器的版本号
cookieEnabled 支持cookie返回true，否则为false
cpuClass 浏览器正在运行的计算机的cpu型号
language 浏览器支持的语言
mimeTypes 浏览器支持的所有MIME类型的数组
onLine 浏览器当前为在线模式，返回true，否则为false
opsProfile 未定义
oscpu 浏览器正在运行的操作系统
platform 浏览器正在运行的操作平台
plugins 浏览器安装插件的数组
product 浏览器的产品名
productSub 与浏览器产品相关的更多信息
securityPolicy 浏览器支持的加密类型
systemLanguage 操作系统的默认语言
userAgent 包含多项属性中的所有或一部分
userLanguage 用户在自己的系统上设置的语言
userProfile 返回一个UserProfile对象，它存储用户的个人信息
vendor 制作浏览器的公司
vendorSub 关于浏览器制作厂商的更多信息
需要注意的是，每个浏览器的Navigator对象所包含的属性并不相同。
新建一个网页navigator.html：
<html>
<body>
<script type="text/javascript">
for (var i in window.navigator) {
document.write("navigator." + i + " = " +window.navigator[i] + "<br />");
}
</script>
</body>
</html>
分别用不同的浏览器打开，就返回各浏览器Navigator对象包含的属性值。
chrome:
navigator.language = zh-CN
navigator.product = Gecko
navigator.mimeTypes = [object DOMMimeTypeArray]
navigator.appVersion = 5.0 (Windows NT 6.1) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.66 Safari/535.11
navigator.plugins = [object DOMPluginArray]
navigator.onLine = true
navigator.platform = Win32
navigator.vendor = Google Inc.
navigator.appCodeName = Mozilla
navigator.cookieEnabled = true
navigator.geolocation = [object Geolocation]
navigator.appName = Netscape
navigator.productSub = 20030107
navigator.userAgent = Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.66 Safari/535.11
navigator.vendorSub =
navigator.javaEnabled = function javaEnabled() { [native code] }
navigator.getStorageUpdates = function getStorageUpdates() { [native code] }
navigator.registerProtocolHandler = function registerProtocolHandler() { [native code] }
navigator.appCodeName = Mozilla
navigator.appName = Netscape
navigator.appVersion = 5.0 (Windows)
navigator.language = zh-CN
navigator.mimeTypes = [object MimeTypeArray]
navigator.platform = Win32
navigator.oscpu = Windows NT 6.1
navigator.vendor =
navigator.vendorSub =
navigator.product = Gecko
navigator.productSub = 20100101
navigator.plugins = [object PluginArray]
navigator.userAgent = Mozilla/5.0 (Windows NT 6.1; rv:8.0.1) Gecko/20100101 Firefox/8.0.1
navigator.cookieEnabled = true
navigator.onLine = true
navigator.buildID = 20111120135848
navigator.javaEnabled = function javaEnabled() { [native code] }
navigator.taintEnabled = function taintEnabled() { [native code] }
navigator.geolocation = [object GeoGeolocation]
navigator.registerContentHandler = function registerContentHandler() { [native code] }
navigator.registerProtocolHandler = function registerProtocolHandler() { [native code] }
navigator.mozIsLocallyAvailable = function mozIsLocallyAvailable() { [native code] }
opera:
navigator.appCodeName = Mozilla
navigator.appMinorVersion =
navigator.appName = Opera
navigator.appVersion = 9.80 (Windows NT 6.1; U; zh-cn)
navigator.browserLanguage = zh-cn
navigator.cookieEnabled = true
navigator.geolocation = [object Geolocation]
navigator.language = zh-cn
navigator.mimeTypes = [object MimeTypes]
navigator.onLine = true
navigator.platform = Win32
navigator.plugins = [object PluginArray]
navigator.userAgent = Opera/9.80 (Windows NT 6.1; U; zh-cn) Presto/2.9.168 Version/11.52
navigator.userLanguage = zh-cn
navigator.javaEnabled = function javaEnabled() { [native code] }
navigator.taintEnabled = function taintEnabled() { [native code] }
Safari:
navigator.geolocation = [object Geolocation]
navigator.cookieEnabled = true
navigator.language = zh-CN
navigator.productSub = 20030107
navigator.product = Gecko
navigator.appCodeName = Mozilla
navigator.mimeTypes = [object MimeTypeArray]
navigator.vendorSub =
navigator.vendor = Apple Computer, Inc.
navigator.platform = Win32
navigator.appName = Netscape
navigator.appVersion = 5.0 (Windows; U; Windows NT 6.1; zh-CN) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1
navigator.userAgent = Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1
navigator.plugins = [object PluginArray]
navigator.onLine = true
navigator.javaEnabled = function javaEnabled() { [native code] }
navigator.getStorageUpdates = function getStorageUpdates() { [native code] }
navigator.registerProtocolHandler = function registerProtocolHandler() { [native code] }
navigator.registerContentHandler = function registerContentHandler() { [native code] }