function choices()
{
//elegir el numero de banner que se desean insertar, ej: 6
	this[0] = 4;

// PRIMER BANNER, Tradedoubler Segunda mano 120x60

this[1] = '<script type="text/javascript" src="http://impes.tradedoubler.com/imp?g(16914496)a(287784)" charset="ISO-8859-1"></script>';

// SEGUNDO BANNER, Tradedoubler Segunda mano 120x60

this[2] = '<script type="text/javascript" src="http://impes.tradedoubler.com/imp?g(16914496)a(287784)" charset="ISO-8859-1"></script>';
    
// TERCER BANNER, Tradedoubler Segunda mano 120x60

this[3] = '<script type="text/javascript" src="http://impes.tradedoubler.com/imp?g(16914496)a(287784)" charset="ISO-8859-1"></script>';
    
// CUARTO BANNER, Tradedoubler Segunda mano 120x60

this[4] = '<script type="text/javascript" src="http://impes.tradedoubler.com/imp?g(16914496)a(287784)" charset="ISO-8859-1"></script>';
   

//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());