一个段小代码，同一个网站针对移动端查看和桌面端查看跳转不同的页面。

首先加载jQuery文件。

    $(function(){            var MobileUA = (function() {                var ua = navigator.userAgent.toLowerCase();                        var mua = {                    IOS: /ipod|iphone|ipad/.test(ua), //iOS                    IPHONE: /iphone/.test(ua), //iPhone                    IPAD: /ipad/.test(ua), //iPad                    ANDROID: /android/.test(ua), //Android Device                    WINDOWS: /windows/.test(ua), //Windows Device                    TOUCH_DEVICE: ('ontouchstart' in window) || /touch/.test(ua), //Touch Device                    MOBILE: /mobile/.test(ua), //Mobile Device (iPad)                    ANDROID_TABLET: false, //Android Tablet                    WINDOWS_TABLET: false, //Windows Tablet                    TABLET: false, //Tablet (iPad, Android, Windows)                    SMART_PHONE: false //Smart Phone (iPhone, Android)                };                        mua.ANDROID_TABLET = mua.ANDROID && !mua.MOBILE;                mua.WINDOWS_TABLET = mua.WINDOWS && /tablet/.test(ua);                mua.TABLET = mua.IPAD || mua.ANDROID_TABLET || mua.WINDOWS_TABLET;                mua.SMART_PHONE = mua.MOBILE && !mua.TABLET;                        return mua;            }());                    //SmartPhone             if (MobileUA.SMART_PHONE) {                // 移动端链接地址                                document.location.href = 'http://www.aaa.com/wap/index.html';            }        });