Update window title when new notifications are pending

This isn't quite as easy as it first seems. Changing the title is simple, just say:

document.title = "New title"

The challenge is that you don't have a way to know that the user is not viewing the page at the time unless the user has set their status as away. So, a notification will come in, the title gets updated, but then on the first message update the notification is cleared and the title goes back to normal.

An idea:

A hidden status field could be set via a function like the following:

window.onblur = function() {jQuery('#window_hidden').html('true');}
window.onfocus = function() {jQuery('#window_hidden').html('false');}

The notification AJAX response can then check the content of this div to determine whether to change the title.