function abrirDocumento(doc){  
	var url = doc;  
	  
	xmlRequest.open("GET", url, true);  
	xmlRequest.onreadystatechange = mudancaEstado;  
	xmlRequest.send(null);  
	 
	/* Enquanto carregando */
	/* if(xmlRequest.readyState == 1) {  
		//document.getElementById("divMensagem").innerHTML = "<p style='text-align:left;'><img src='imagens/loading.gif' width='50' height='50'><br />Carregando...</p>";  
		//document.getElementById("divMensagem").innerHTML = "<p style='text-align:left;'>Carregando mensagens...</p>";  
	}  
	*/
	  
	return url;  
	
}  
	  
	function mudancaEstado(){  
	if(xmlRequest.readyState == 4){  
		document.getElementById("divMensagem").innerHTML = xmlRequest.responseText;
		//tocarSom();
		window.location.href="#fim";
		document.form1.txtpergunta.focus(); //ajusta o foco no campo pergunta
		document.form1.txtpergunta.value = document.form1.txtpergunta.value; //coloca o cursor no final do campo
	}  
}