title: Iframe proxying without extra traffic
body: <p>For the sake of cross-domain javascript communications I use iframe proxying technique with onresize event monitoring<br>
  (the method is well known and perfectly described here <a href="http://softwareas.com/cross-domain-communication-with-iframes" rel="nofollow">http://softwareas.com/cross-domain-communication-with-iframes</a>).<br>
  But I'm still not happy because of extra page load produced by the hidden iframe.<br>
  How to get rid of this unwanted iframe traffic?</p>