var browser = {
versions: function() {var u = navigator.userAgent, app = navigator.appVersion;return {//移动终端浏览器版本信息trident: u.indexOf('Trident') > -1, //IE内核presto: u.indexOf('Presto') > -1, //opera内核webKit: u.indexOf('AppleWebKit') > -1, //苹果、谷歌内核gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1, //火狐内核mobile: !!u.match(/AppleWebKit.*Mobile.*/) || !!u.match(/AppleWebKit/), //是否为移动终端ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, //android终端或者uc浏览器iPhone: u.indexOf('iPhone') > -1 || u.indexOf('Mac') > -1, //是否为iPhone或者QQHD浏览器iPad: u.indexOf('iPad') > -1, //是否iPadwebApp: u.indexOf('Safari') == -1 //是否web应该程序，没有头部与底部
                    };}(),
language: (navigator.browserLanguage || navigator.language).toLowerCase()
}if (browser.versions.ios || browser.versions.iPhone || browser.versions.iPad) {
window.location="https://itunes.apple.com/xxx";
}
else if (browser.versions.android) {
window.location="http://xxx/xxx.apk";
}document.writeln("语言版本: " + browser.language + "<br>");
document.writeln(" 是否为移动终端: " + browser.versions.mobile + "<br>");
document.writeln(" ios终端: " + browser.versions.ios + "<br>");
document.writeln(" android终端: " + browser.versions.android + "<br>");
document.writeln(" 是否为iPhone: " + browser.versions.iPhone + "<br>");
document.writeln(" 是否iPad: " + browser.versions.iPad + "<br>");
document.writeln(navigator.userAgent);