How to remove scrollbars from Facebook iFrame application

Question

It’s explained how to do this here:
http://clockworkcoder.blogspot.com/2011/02/how-to-removing-facebook-application-i.html
Basically you should use

window.fbAsyncInit = function() {
    FB.Canvas.setAutoGrow();
};

plus make sure that your html and body tags are set to overflow:hidden so you don’t get those briefly shown scroll bars that are so annoying

<html xmlns="http://www.w3.org/1999/xhtml" style="overflow: hidden">
    <head>
  <!-- Header stuff -->
 </head>
 <body style="overflow: hidden">