通过js中的useragrent来判断设备是pc端还是移动端，跳转不同的地址

if(/AppleWebKit.*Mobile/i.test(navigator.userAgent) || (/MIDP|SymbianOS|NOKIA|SAMSUNG|LG|NEC|TCL|Alcatel|BIRD|DBTEL|Dopod|PHILIPS|HAIER|LENOVO|MOT-|Nokia|SonyEricsson|SIE-|Amoi|ZTE/.test(navigator.userAgent))){
    if(window.location.href.indexOf("?mobile")<0){
        try{
            if(/Android|webOS|iPhone|iPod|BlackBerry/i.test(navigator.userAgent)){
                //手机
                window.location.href="http://www.mobile.com";
            }else if(/iPad/i.test(navigator.userAgent)){
                //ipad
                window.location.href="http://ipad.com"
            }else{
                //电脑
                window.location.href="http://pc.com"
            }
        }catch(e){}
    }
}