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';  
        }  
    });