gistfile1.js

<script>
	document.addEventListener('DOMContentLoaded', pageFullyLoaded, false);
	function pageFullyLoaded(){
		var body = document.body,
    		html = document.documentElement;
		var height = Math.max( body.scrollHeight, body.offsetHeight, html.clientHeight, html.scrollHeight, html.offsetHeight );
		alert(height);
		Sfdc.canvas.publisher.resize( {height : height+'px'});
	}
</script>