| IE6 IE7 IE8 | Firefox Chrome Safari | Opera | |
|---|---|---|---|
| navigator.language | undefined | zh-CN | zh-CN |
| navigator.userLanguage | zh-cn | undefined | zh-cn |
| navigator.browserLanguage | zh-cn | undefined | zh-cn |
| navigator.systemLanguage | zh-cn | undefined | undefined |
原文：http://www.cnblogs.com/luoxiaofu/p/7428427.html