var js = 1.0;
Version = parseInt(navigator.appVersion)
if (navigator.appName == "Netscape") {
    js = ((Version >= 4) ? 1.2 : ( (Version == 3) ? 1.1 : 1.0 ));
} else {
    if (navigator.appVersion.indexOf('MSIE') != -1) {
        js = ((Version >= 4) ? 1.1 : 1.0);
    }
}

function changeImagemap(newImage) {
    if (js > 1.0) document ['home-banner'].src = eval(newImage + ".src");
}

if (js > 1.0) {
    home = new Image();
    home.src  = "images/banners/home-banner.gif";

    catalog = new Image();
    catalog.src  = "images/banners/catalog.gif";

    tips = new Image();
    tips.src  = "images/banners/tips.gif";

    workshops = new Image();
    workshops.src  = "images/banners/workshops.gif";

    aboutus = new Image();
    aboutus.src  = "images/banners/about-us.gif";

    contactus = new Image();
    contactus.src  = "images/banners/contact-us.gif";
}