判断浏览器使用的语言

local.language.js

var language = navigator.userLanguage?navigator.userLanguage:(navigator.browserLanguage?navigator.browserLanguage:(navigator.systemLanguage?navigator.systemLanguage:(navigator.language?navigator.language:"")));
language = language.toLowerCase();
if (language.length!=5) {
    language = "zh-cn";
} else {
    if (language === "zh-hk" || language === "zh-mo") {
        language = "zh-tw";
    } else if (language !== "zh-cn")  {
        language = "en-us";
    } else {
        language = "zh-cn";
    }
}