function abrirPag(valor){

var url = valor;

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


if (xmlRequest.readyState == 1) {

document.getElementById("meio_trans").innerHTML = "<img src='imagens/loader.jpg'>";

}


return url;

}


function mudancaEstado(){

if (xmlRequest.readyState == 4){

document.getElementById("meio_trans").innerHTML = xmlRequest.responseText;

}

}