home = new Image(146, 37);
        home.src = "images/home.png";
        home_bold = new Image(146, 37);
        home_bold.src = "images/home_bold.png";
        services = new Image(146, 37);
        services.src = "images/services.png";
        services_bold = new Image(146, 37);
        services_bold.src = "images/services_bold.png";
        philosophy = new Image(146, 37);
        philosophy.src = "images/philosophy.png";
        philosophy_bold = new Image(146, 37);
        philosophy_bold.src = "images/philosophy_bold.png";
        resources = new Image(146, 37);
        resources.src = "images/resources.png";
        resources_bold = new Image(146, 37);
        resources_bold.src = "images/resources_bold.png";
        contact = new Image(146, 37);
        contact.src = "images/contact.png";
        contact_bold = new Image(146, 37);
        contact_bold.src = "images/contact_bold.png";

        function boldOn(imgName) {
              imgOn = eval(imgName + "_bold.src");
              document.images[imgName].src = imgOn;
        }

        function boldOff(imgName) {
              imgOff = eval(imgName + ".src");
              document.images[imgName].src = imgOff;
        }