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<script type="text/javascript">
function sendHeight()
{​​
if(parent.postMessage)
{​​
// replace #wrapper with element that contains
// actual page content
var height= document.getElementById('container').offsetHeight;
parent.postMessage(height, '*');
}​​
}​​// Create browser compatible event handler.
var eventMethod = window.addEventListener ? "addEventListener" : "attachEvent";
var eventer = window[eventMethod];
var messageEvent = eventMethod == "attachEvent" ? "onmessage" : "message";// Listen for a message from the iframe.
eventer(messageEvent, function(e) {​​ if (isNaN(e.data)) return; sendHeight();}​​,
false);
</script>