adImages = new Array("imagea1.gif","imagea1.gif","imagea1.gif");
    bann = 0;

    function rotate() 
    {
        if (document.images) 
        {
            if (document.adBanner.complete) 
            {
                bann++
                if (bann == adImages.length) // cand am ajuns la sfarsit
                {
                    bann = 0;
                }
                document.adBanner.src=adImages[bann];
            }
            setTimeout("rotate()", 3000); // la 3 secunde
        }
    }