function abrirPag(valor){

	var url = valor;

	xmlRequest.open("GET",url,true);
	xmlRequest.onreadystatechange = mudancaEstado;
	xmlRequest.send(null);

	if (xmlRequest.readyState == 1) {
		document.getElementById("carrega").innerHTML = "carregando...";
	}
	
	return url;
}


function mudancaEstado(){

	if (xmlRequest.readyState == 4){
		document.getElementById("carrega").innerHTML = xmlRequest.responseText;
	}

}