JavaScript设置不同来路链接跳转不同的落地页？设备检测

需求说明：

有三个不同来路的二级域名，PC端访问，显示主域名所展示的落地页；移动端显示不同的二级目录落地页；如下：

访问域名a01.domain.com; PC访问展示www.domain.com；移动端访问展示 http://loadpage.com/aa；

访问域名a02.domain.com; PC访问展示www.domain.com；移动端访问展示 http://loadpage.com/bb；

访问域名a03.domain.com; PC访问展示www.domain.com；移动端访问展示 http://loadpage.com/cc；

设置方法：

1.在服务器上，将a01.domain.com；a02.domain.com；a03.domain.com全部绑定到www.domain.com对应的文件；

2.在访问域名和www主域名对应的主页面 head标签内，添加如下代码：

 1         (function go_mobile() {
 2 
 3                 var sUserAgent = navigator.userAgent.toLowerCase();
 4                 var bIsIpad = sUserAgent.match(/ipad/i) == "ipad";
 5                 var bIsIphoneOs = sUserAgent.match(/iphone/i) == "iphone";
 6                 var bIsMidp = sUserAgent.match(/midp/i) == "midp";
 7                 var bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
 8                 var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb";
 9                 var bIsAndroid = sUserAgent.match(/android/i) == "android";
10                 var bIsCE = sUserAgent.match(/windows ce/i) == "windows ce";
11                 var bIsWM = sUserAgent.match(/windows mobile/i) == "windows mobile";
12                 var bIsWp = sUserAgent.match(/windows phone/i) == "windows phone";
13                 var hostUrl = window.location.href;
14 
15 
16                 if (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM || bIsWp) {
17                     if (hostUrl.indexOf("a01") != -1) {
18                         location.href = 'http://loadpage.com/aa'; //MB
19                     }
20                     if (hostUrl.indexOf("a02") != -1) {
21                         location.href = 'http://loadpage.com/bb'; //MB
22                     }
23 
24                     if (hostUrl.indexOf("a03") != -1) {
25                         location.href = 'http://loadpage.com/cc'; //MB
26                     }
27 
28                 } else {
29                     location.href = 'http://www.domain.com/'; //2022/3/23
30                 }
31             })();