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>