function readImg (direction) {
    if (document.images) {
        ImageNumber += direction;
            if (ImageNumber > ImageLength) {
                ImageNumber = 1;
            } else if (ImageNumber == 0) {
                ImageNumber = ImageLength;
            }
            NextImage = ImageNumber + 1;
            PreviousImage = ImageNumber - 1;
            if (PreviousImage > 0) {
                ImageArray[PreviousImage] = new Image();
                ImageArray[PreviousImage].src = loadedArray[PreviousImage].src;
            }
            if (NextImage > 1 && NextImage <= ImageLength) {
                ImageArray[NextImage] = new Image();
                ImageArray[NextImage].src = loadedArray[NextImage].src;
            }
            if (loadedArray[ImageNumber] != null) {
                document.images.theSlide.src = loadedArray[ImageNumber].src;
            }
        
     }
}