function choices()
{
//elegir el numero de banner que se desean insertar, ej: 6
this[0] = 1;
this[1] = '<iframe allowtransparency="true" src="http://www.codigobarras.com/share-ht/jedis/ad_tpl.php?ic=2471&amp;r=14014" width="120" height="60" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" align="middle"></iframe>';
//this[3] = '<script type="text/javascript"  src="http://www.netfilia.com/contenidos/insert_html.html?cmf=1991&con_capa=1&contenido=120x60&web=1317&p=141398827&id=hirYaXnD7lN92"></script>';
//si se pone arriba ej: 7 aqui añadir this[7]=' codigo ';
}
function popUpBanner(list)
{
var today = new Date();
var choiceInstance = new choices();
var Banner = choiceInstance[(today.getSeconds() % choiceInstance[0]) + 1];
}
function grabBanner()
{
var today = new Date();
var choiceInstance = new choices();
var Banner = choiceInstance[(today.getSeconds() % choiceInstance[0]) + 1];
return Banner;
}
document.writeln(grabBanner());