title: Page title Notification in multiple browsers
body: <p>I have a chat script on a webpage. 
  Now, when someone adds a message I want to notify other people who have the page/tab open but not active, to receive a notification of a new message.<br />
  For instance, I would like to change the page title from 'Chat' to 'New message - Chat'.
  I think this is what 'Facebook Chat' does too.</p>
  
  <p>But when I use:
  document.title = "New Message";
  It only changes in the browser of the user that submitted the message. Not on the other browsers.</p>
  
  <p>How can I achieve this?</p>