var t2;
    change_text = function() {
        var element = "NewsRotationContent";
        $(element).style.display="none";
        new Ajax.Updater(

            element,
            "/_custom/modules/flash_rotation/flash_rotation.show.php", {
                method: 'get',
                onComplete: new Effect.Appear(element, {duration:3.0})});
        t2=setTimeout("change_text()",8*1000); // 20 sek * 1000 (milisek)

    }