function choices()
{
//elegir el numero de banner que se desean insertar, ej: 6
this[0] = 1;

// PRIMER BANNER, Tradedoubler. Viajes Iberia
this[1] = '<a href="http://clk.tradedoubler.com/click?p(57039)a(287784)g(17035788)" title="Mi Texto" target="_blank" style="text-decoration:none"> <font face="Verdana" color="#336600">Reservas de Hotel</font></a><img src="http://impes.tradedoubler.com/imp?type(inv)g(17035788)a(287784)">';

//si se pone arriba ej: 7 aqui aņadir 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());