title: Is 'window' always on top of the scope chain in javascript?
body: <p>I've seen global variables defined with window.global_name.
  I wonder why not just using global_name even if this script will be run in closure.</p>
  
  <p><strong>UPD</strong>: seems like IE doesn't explicitly add it to the window object, when you declare it inside of a closure</p>