function abre_selo() {
    var janela = window.open('https://sealinfo.thawte.com/thawtesplash?form_file=fdf/thawtesplash.fdf&dn=www.microofficeinformatica.com.br&lang=en', 'Certificado', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,menubar=no,width=550,height=535,left=200,top=10,screenX=200,screenY=10');
    janela.focus();
}