function showBanner(url, object) {
    hideBanners();

    object.onclick = "";

    object.href = url;
    object.childNodes[0].src = './App_themes/default/graphics/banners/' + object.childNodes[1].value + '.png';
}

function hideBanners() {
    var bannerLinks = document.getElementsByClassName('bannerLink');

    for (var i = 0; i < bannerLinks.length; i++) {
        if (bannerLinks[i].href != '') {
            bannerLinks[i].onclick = new Function("showBanner('" + bannerLinks[i].href + "', this); return false;");
            
            if (bannerLinks[i].attributes.getNamedItem('href'))
                bannerLinks[i].attributes.removeNamedItem('href');

            bannerLinks[i].childNodes[0].src = './App_themes/default/graphics/banners/' + bannerLinks[i].childNodes[1].value + '_Small.png';
        }
    }
}