HTML5的桌面提醒消息

function fnShow() {
       var date = new Date();
       var time = date.getHours() + ":" + date.getMinutes() + ":" + date.getSeconds();
       Notification.requestPermission(function (perm) {
           if (perm == "granted") {
               var notification = new Notification("现在时间:", {
                   dir: "auto",
                   lang: "hi",
                   tag: "testTag",
                   icon: "img/QR.png",
                   body:  time
               });
           }
       })
   }

<input type="button" value="桌面提醒显示时间" onClick="fnShow();">注意，需要在服务器端运行