JS 判断浏览器客户端类型(ipad,iphone,android)

参考：http://my.oschina.net/parker/blog/112888

如何判断是否是 iPad 浏览器呢，关键是看它的 User Agent 中是否有 iPad。iPad 使用的是 Safari Mobile 浏览器，他的的 User Agent 是：

Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B334b Safari/531.21.10

Javascript代码

function is_iPad(){ 

    var ua = navigator.userAgent.toLowerCase(); 

    if(ua.match(/iPad/i)=="ipad") { 

       return true; 

    } else { 

       return false; 

    } 

}

因此，判断ipad,iphone,android的代码为：

<script type="text/javascript">

    var bForcepc = fGetQuery("dv") =="pc";

    functionfBrowserRedirect(){

        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/";
            }

        }

    }

    functionfGetQuery(name){//获取参数值

        var sUrl = window.location.search.substr(1);

        var r = sUrl.match(newRegExp("(^|&)"+ name +"=([^&]*)(&|$)"));

        return(r ==null?null: unescape(r[2]));

    }

    functionfShowVerBlock(){

        if(bForcepc){

            document.getElementById("dv_block").style.display ="block";

        }

         else{

            document.getElementById("ad_block").style.display ="block";

        }

    }

    fBrowserRedirect();

</script>