function initImageList( nameArray, width, height)
{
    result = new Array( nameArray.length);
    for (i = 0; i < nameArray.length; i++)
    {
        result[i] = new Image(width, height)
        result[i].src = nameArray[i];
    }
    return result;
}

function changeImage(imageElementName, newImage) {
    document.images[imageElementName].src = newImage.src;
}