title: Browser tab change notification like when you get a new gmail e-mail or a new tweet in Twitter
body: <p>In Chrome and Firefox, whenever I get a new email the inactive tab displays a very subtle notification. Basically, it just shines a little. In Chrome is shines from left to right as if someone is shining a flashlight on the tab. </p>
  
  <p>It also does this when your are on the Twitter homepage, and a new tweet shows up.</p>
  
  <p>I'm sure it is some Javascript function, but I can't seem to find it, because I don't think I am asking the question right. </p>
  
  <p>Does anyone know how to do this?</p>