Notification HTML5 Chrome Safari http://www.chromium.org/developers/design-documents/desktop-notifications/api-specification

notification.js

notification : function(sUrl, sTitle, sContent, onDisplay, onClick, onClose)
  {
		if(window.webkitNotifications) { // Test si webkitNotifications de Chrome
			if (window.webkitNotifications.checkPermission() == 0) { // 0 is PERMISSION_ALLOWED
				var notif = window.webkitNotifications.createNotification(
				  sUrl,  // icon url - can be relative
				  sTitle,  // notification title
				  sContent  // notification body text
				);

				notif.ondisplay = onDisplay;
	    		notif.onclick = onClick;
	    		notif.onclose = onClose;
			notif.addEventListener('display', function() { // On la close au bout de 5 sec
				    window.setTimeout(function() {
				        notif.cancel();
				    }, 5000);
				});
				notif.show();
			} else {
				// On demande la permission a l'utilisateur	
			 	window.webkitNotifications.requestPermission(function() {
			 		WMailDesign.notification(sUrl, sTitle, sContent, onDisplay, onClick, onClose);
			 	}); 
			}
		} else if(window.Notification) { // Cas Safari
			if (Notification.permissionLevel() === "granted") {
				var notif = new Notification(sTitle);
				
				notif.show();
			} else if (Notification.permissionLevel() === "default") {
				Notification.requestPermission(function () {
					WMailDesign.notification(sUrl, sTitle, sContent, onDisplay, onClick, onClose);
				});
			}
		}
	}