Event.observe(window, 'load', function() {
    Iniciar();
});

function Iniciar() {
    new Effect.Move('home_novedades_mercados_contenido', {
        x: 0,
        mode: 'absolute',
        duration: 15, 
        afterFinish: Posicionar,
        transition: Effect.Transitions.linear
    });
}

function Posicionar(effect) {
    effect.element.setStyle({ left: '1160px' });
    Iniciar();
}