title: iFrame 100% height causes vertical scrollbar
body: <p>I see alot of questions about 100% height iFrames but noone seems to have the exact same problem as I do.</p>
  
  <p>What I want to do is to have an iFrame that covers the entire viewport, with no scrollbars, without setting overflow: hidden on the body.</p>
  
  <p>I get a 5px bottom margin to my iFrame that won't go away with css, and it causes a vertical scroolbar. The standard advice seems to be to set overflow: hidden on the body, but that's not really solving the problem, and it's not enough for me.</p>
  
  <p>Here's a super simple <a href="http://jsfiddle.net/b64Ug/6/" rel="noreferrer">jsFiddle example</a>. (notice the double vertical scrollbars)</p>
  
  <p>This behaviour is the same in Chrome 15, IE9 and FF9 for me.</p>