function RotarImagen(pictureName,imageFiles,displaySecs) {
            var imageSeparator = imageFiles.indexOf(";");
            var nextImage = imageFiles.substring(0,imageSeparator);
            
            if (document.all) {
                document.getElementById(pictureName).style.filter="blendTrans(duration=2)";
                document.getElementById(pictureName).filters.blendTrans.Apply();
            }
            
            document.getElementById(pictureName).src = nextImage;
            
            if (document.all) {
                document.getElementById(pictureName).filters.blendTrans.Play();
            }
            
            var futureImages= imageFiles.substring(imageSeparator+1,imageFiles.length) + ';' + nextImage;
            
            setTimeout("RotarImagen('"+pictureName+"','"+futureImages+"',"+displaySecs+")", displaySecs*1000);
            // cambio de imagen.
            
            imageSeparator = futureImages.indexOf(";");
            nextImage = futureImages.substring(0,imageSeparator);
            
            if (slideCache[nextImage] == null) {
                slideCache[nextImage] = new Image;
                slideCache[nextImage].src = nextImage;
            }
        }