JS客户端判断

<script language="javascript" type="text/javascript">

        function browserDetection(){

              var userAgent=window.navigator.userAgent.toLowerCase();

              var browser=null;

              if(userAgent.match(/ipad/i)){browser='ipad';

              }else if(userAgent.match(/iphone os/i)){browser='iphone';

              }else if(userAgent.match(/midp/i)){browser='midp'   

              }else if(userAgent.match(/rv:1.2.3.4/i)){browser='rv:1.2.3.4';

              }else if(userAgent.match(/ucweb/i)){browser='ucweb';

              }else if(userAgent.match(/android/i)){browser='android';

              }else if(userAgent.match(/windows ce/i)){browser='windowsCe';

              }else if(userAgent.match(/windows mobile/i)){browser='windowsMobile'; 

              }else{browser='PC' 

              }

              return browser;

       }

if(browserDetection()!="PC"){alert("不是PC端")

}else{alert("是PC端")}

</script>