最近用bootstrap做自适应，发现仍然很难很好的兼容web端和PC端的现实。
仔细观察百度，淘宝，京东等大型网站，发现这些网站都有对应不同客户端的子站。
| 站点 | PC端url | web端url |
|---|---|---|
| 百度 | www.baidu.com | m.baidu.com |
| 淘宝 | www.taobao.com | m.taobao.com |
| 京东 | www.jd.com | m.jd.com |
| 网易 | www.163.com | 3g.163.com |
/*判断当前设备跳转到指定地址。PCurl:PC端地址；WebUel:PC端地址；*/
function judgmentClient(PCurl,WebUel){
var UserClient = navigator.userAgent.toLowerCase();
var IsIPad = UserClient.match(/ipad/i) == "ipad";
var IsIphoneOs = UserClient.match(/iphone os/i) == "iphone os";
var IsMidp = UserClient.match(/midp/i) == "midp";
var IsUc7 = UserClient.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
var IsUc = UserClient.match(/ucweb/i) == "ucweb";
var IsAndroid = UserClient.match(/android/i) == "android";
var IsCE = UserClient.match(/windows ce/i) == "windows ce";
var IsWM = UserClient.match(/windows mobile/i) == "windows mobile";
if(IsIPad || IsIphoneOs || IsMidp || IsUc7 || IsUc || IsAndroid || IsCE || IsWM){
window.location = WebUel;
}else{
window.location = PCurl;
}
}
这套代码虽然可以直接使用，但会有个调用的问题。
假设现有一个PC页 和 一个Web页，这两个页面onload的时候都调用这个函数，结果是反复调用此函数，页面不停刷新。(有兴趣的朋友可以自行尝试)
起初这个调用bug想了两个小时就是绕不出来。(本菜有点愚钝)
后来终于想明白了，其实就是把这个拆开成两个函数，分开调用就OK了。
function PCjudgment(WebUel){
var UserClient = navigator.userAgent.toLowerCase();
var IsIPad = UserClient.match(/ipad/i) == "ipad";
var IsIphoneOs = UserClient.match(/iphone os/i) == "iphone os";
var IsMidp = UserClient.match(/midp/i) == "midp";
var IsUc7 = UserClient.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
var IsUc = UserClient.match(/ucweb/i) == "ucweb";
var IsAndroid = UserClient.match(/android/i) == "android";
var IsCE = UserClient.match(/windows ce/i) == "windows ce";
var IsWM = UserClient.match(/windows mobile/i) == "windows mobile";
if(IsIPad || IsIphoneOs || IsMidp || IsUc7 || IsUc || IsAndroid || IsCE || IsWM){
window.location = WebUel;
}
}
// web端调用判断PC设备
function Webjudgment(pcUel){
var UserClient = navigator.userAgent.toLowerCase();
var IsIPad = UserClient.match(/ipad/i) == "ipad";
var IsIphoneOs = UserClient.match(/iphone os/i) == "iphone os";
var IsMidp = UserClient.match(/midp/i) == "midp";
var IsUc7 = UserClient.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
var IsUc = UserClient.match(/ucweb/i) == "ucweb";
var IsAndroid = UserClient.match(/android/i) == "android";
var IsCE = UserClient.match(/windows ce/i) == "windows ce";
var IsWM = UserClient.match(/windows mobile/i) == "windows mobile";
if(!IsIPad && !IsIphoneOs && !IsMidp && !IsUc7 && !IsUc && !IsAndroid && !IsCE && !IsWM){
window.location = pcUel;
}
}