title: sharepoint notify new items to list
body: <p>I'm creating a sharepoint hosted app, two pages, default.aspx and admin.aspx.
  When I update the list in the appweb thru a function in default.aspx, I want that a notify windows will popup to the client that are watching the admin.aspx page, that a new items is added to the list.</p>
  
  <p>Is that possible in sharepoint 2013?</p>