function abre_fullscreen(pagina){


largura = 720;
altura = 420;

//janela = window.open(pagina, "janela", "width="+largura+", height="+altura+", status=0, toolbar=0, location=0, menubar=0, directories=0, resizable=0, scrollbars=0");

janela = window.open(pagina, "janela", "width=" + largura + ", height=" + altura + ", status=no, toolbar=no, location=no, menubar=no, directories=no, resizable=no, scrollbars=no");
}

function muda_pagina(pagina){

janela.close();
window.location = pagina;

}