title: How can I make a div 100% height fixed?
body: <p>I want to a div with 100% height but fixed position like right side of this website:  <a href="http://www.dast2.com" rel="nofollow noreferrer">http://www.dast2.com</a></p>
  
  <p>I know these are required: height:100%; position:fixed;</p>
  
  <p>but it doesn't work for me.</p>