title: Creating an AJAX alert for a user when there's a server-side change
body: <p>I have a site where employees can login and manage things.</p>
  
  <p>Each employee has a list of To-Do Items. Items can be added to an employee's list for several different things, like a new customer signing up. When an item is added to an employee's list, I'd like for an ajax dialog to show on the logged-in employee screen, which they can then simply dismiss.</p>
  
  <p>What's the best way of doing this? I'm using C#, MVC 3 and Razor</p>