js 判断客户端

   /* * 智能机浏览器版本信息: * */
        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 i
                    Phone: 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iPad
                    webApp: 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/cn/app/kuai-zhu-you-fang/id899514012?mt=8"; }
        else if (browser.versions.android)
        { window.location = "http://a.app.qq.com/o/simple.jsp?pkgname=com.uehouses"; }
        // document.writeln("语言版本: " + browser.language);
        // document.writeln(" 是否为移动终端: " + browser.versions.mobile);
        // document.writeln(" ios终端: " + browser.versions.ios);
        // document.writeln(" android终端: " + browser.versions.android);
        // document.writeln(" 是否为iPhone: " + browser.versions.iPhone);
        // document.writeln(" 是否iPad: " + browser.versions.iPad);
        // document.writeln(navigator.userAgent);