function setImage(name, new_src, layer)
{
        // version test
        if ((navigator.appName == 'Netscape' && parseFloat(navigator.appVersion) >= 3) ||
                (parseFloat(navigator.appVersion) >= 4)
        ) {
                if (!document.layers || !layer)
                        eval('document.' + name + '.src = "' + new_src + '"');
                else
                        document.layers[layer].document.images[name].src = new_src;
        };
}