function exibe_testemunho(cod) 
{
	var testemunho = document.getElementById('testemunho');
	
	if (xmlhttp) 
	{		
		var hack = new Date(); 
		var dummy = hack.getTime();
		xmlhttp.open("post", "ajax_exibe_testemunho.php?cod=" + cod + "&hack=" + dummy ,true);
		xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; iso-8859-1");
		xmlhttp.setRequestHeader("Cache-Control", "no-store, no-cache, must-revalidate");
		xmlhttp.setRequestHeader("Cache-Control", "post-check=0, pre-check=0");
		xmlhttp.setRequestHeader("Pragma", "no-cache");

		xmlhttp.onreadystatechange=function() 
		{
			if (xmlhttp.readyState==4)
			{
				if(xmlhttp.responseText != "")
				{
					if(xmlhttp.responseText.lastIndexOf("Erro") == -1)
					{
						testemunho.innerHTML = xmlhttp.responseText;
					}
				}
			}
		}
		xmlhttp.send(null);		
	}	
}