title: Slanted Corner on CSS box
body: <p>I have been playing with CSS for only a short time and am trying to have a normal box but with the top left hand corner cut off at a 45 degree angle. Not a small amount either; I'm looking at a quite large corner cut at that angle. This effect:</p>
  
  <p><img src="https://i.stack.imgur.com/J0Cgl.jpg" alt="http://tadesign.net/corner.jpg"></p>
  
  <p>How should I go about it?</p>