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 ['boxImage'].src = eval(newImage + ".src");
}

if (js > 1.0) {
    main = new Image();
    main.src  = "/images/nav-bar.gif";

    why = new Image();
    why.src  = "/images/nav-bar-1.gif";

    about = new Image();
    about.src  = "/images/nav-bar-2.gif";

    services = new Image();
    services.src  = "/images/nav-bar-3.gif";
	
    portfolio = new Image();
    portfolio.src  = "/images/nav-bar-4.gif";
    
    contact = new Image();
    contact.src  = "/images/nav-bar-5.gif";
}