function sizeit(){
	var inner = document.body.innerHTML;
	altura = document.body.scrollHeight + 30;
	document.body.innerHTML=inner+"<iframe id=\"pipe\" src=\"\" height=\"0\" border=\"0\" style=\"border:0;\"></iframe>";
	var pipe = document.getElementById('pipe');
	pipe.src = 'http://www.respirafutebol.com/resize.htm?altura='+altura;
}

window.onload = sizeit;