Browser notification

browser-notification.js

function notifyMe(url) {
  if (!Notification) {
    alert('Notifications are supported in modern versions of Chrome, Firefox, Opera and Firefox.'); 
    return;
  }

  if (Notification.permission !== "granted")
    Notification.requestPermission();

  var notification = new Notification('Site is up!', {
  	icon: 'thumbs-up.png',
    body: "Hey there! " + url + " is back online now!",
  });

  notification.onclick = function () {
    window.open(url);      
  };
}