var i = 0;
var banners = Array("autumn", "barrel", "bunches", "cork", "home", "merlot", "shelves");
function rotateBanner(image) {
    if (i >= banners.length)
        i = 0;
    image.src = "media/image/jpeg/title_" + banners[i] + ".jpg";
    i++;
}

function imageSwitch(image, suffix) {
    len     = image.src.length;
    url     = image.src.substr(0, (len - 5));
    image.src = url + suffix + '.' + image.src.substr(image.src.length - 3);
}