7
<script type="text/javascript"> 
<!-- 
        //平台、设备和操作系统 
        var system = { 
            win: false, 
            mac: false, 
            xll: false, 
            ipad:false 
        }; 
        //检测平台 
        var p = navigator.platform; 
        system.win = p.indexOf("Win") == 0; 
        system.mac = p.indexOf("Mac") == 0; 
        system.x11 = (p == "X11") || (p.indexOf("Linux") == 0); 
        system.ipad = (navigator.userAgent.match(/iPad/i) != null)?true:false; 
        //跳转语句,如果是手机访问就自动跳转到wap.baidu.com页面 
        if (system.win || system.mac || system.xll||system.ipad) { 
 
        } else { 
 
            window.location.href = "http://www.jdpatro.com/3g/"; 
        } 
--> 
</script> 

腾讯网的适配代码

<script type="text/javascript">  
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)){ 
                window.location.href="http://shipei.qq.com/index.htm"; 
            }else if(/iPad/i.test(navigator.userAgent)){ 
            }else{ 
                window.location.href="http://shipei.qq.com/simple/s/index/" 
            } 
        }catch(e){} 
    } 
} 
</script> 
<script type="text/javascript"> 
    var browser = { 
        versions : function() { 
            var u = navigator.userAgent, app = navigator.appVersion; 
            return {//移动终端浏览器版本信息                                  
            trident : u.indexOf('Trident') > -1, //IE内核                                  
            presto : u.indexOf('Presto') > -1, //opera内核                                  
            webKit : u.indexOf('AppleWebKit') > -1, //苹果、谷歌内核                                  
            gecko : u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1, //火狐内核                                 
            mobile : !!u.match(/AppleWebKit.*Mobile.*/) 
                    || !!u.match(/AppleWebKit/), //是否为移动终端                                  
            ios : !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端                  
            android : u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, //android终端或者uc浏览器                                  
            iPhone : u.indexOf('iPhone') > -1 || u.indexOf('Mac') > -1, //是否为iPhone或者QQHD浏览器                     
            iPad: u.indexOf('iPad') > -1, //是否iPad        
            webApp : u.indexOf('Safari') == -1,//是否web应该程序,没有头部与底部 
            google:u.indexOf('Chrome')>-1 
        }; 
    }(), 
    language : (navigator.browserLanguage || navigator.language).toLowerCase() 
    } 
    document.writeln("语言版本: "+browser.language); 
    document.writeln(" 是否为移动终端: "+browser.versions.mobile); 
</script> 

JS 判断浏览器客户端类型(ipad,iphone,android)

<script type="text/javascript">  
   var bForcepc 
= fGetQuery("dv") == "pc";   
   function 
fBrowserRedirect(){   
       var sUserAgent = navigator.userAgent.toLowerCase();  
       var bIsIpad = sUserAgent.match(/ipad/i) == 
"ipad";    
       var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os";  
       var bIsMidp = sUserAgent.match(/midp/i) == "midp";  
       var bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";  
       var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb";  
       var bIsAndroid = sUserAgent.match(/android/i) == "android";  
       var bIsCE = sUserAgent.match(/windows ce/i) == "windows ce";  
       var bIsWM = sUserAgent.match(/windows mobile/i) == "windows 
mobile";   
       if(bIsIpad){   
           var sUrl = 
location.href;      
           if(!bForcepc){   
               window.location.href = "http://ipad.mail.163.com/";  
           }   
       }   
       if(bIsIphoneOs || bIsAndroid){   
           var sUrl = 
location.href;      
           if(!bForcepc){   
               window.location.href = "http://smart.mail.163.com/";  
           }   
       }   
       if(bIsMidp||bIsUc7||bIsUc||bIsCE||bIsWM){   
           var sUrl = 
location.href;      
           if(!bForcepc){   
               window.location.href = "http://m.mail.163.com/";  
           }   
       }   
   }  
   function 
fGetQuery(name){//获取参数值   
       var sUrl = window.location.search.substr(1);  
       var r = sUrl.match(new RegExp("(^|&)" + name + 
"=([^&]*)(&|$)"));  
       return (r == null ? null : (r[2]));  
   }  
   function 
fShowVerBlock(){     
       if(bForcepc){   
           document.getElementByIdx_x("dv_block").style.display = "block";  
       }   
       else{   
           document.getElementByIdx_x("ad_block").style.display = "block";  
       }   
   }  
   fBrowserRedirect();   
   </script> 

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