var show_=1
browser_ = navigator.appName;
version_ = parseInt(navigator.appVersion);
        if (browser_ == "Netscape" && version_ >= 3) version = "n3";
        else if (browser_ == "Microsoft Internet Explorer" && version_ >= 4) show_ = 1;
        else show_=0; 
 
        if (show_==1 && navigator.javaEnabled())  {

        k1on = new Image();
        k1on.src = "images/buttons/pradzia_on.jpg";
        k1off = new Image();
        k1off.src = "images/buttons/pradzia_off.jpg";

        k2on = new Image();
        k2on.src = "images/buttons/bendruomene_on.jpg";
        k2off = new Image();
        k2off.src = "images/buttons/bendruomene_off.jpg";

        k3on = new Image();
        k3on.src = "images/buttons/nuotraukos_on.jpg";
        k3off = new Image();
        k3off.src = "images/buttons/nuotraukos_off.jpg";

        k4on = new Image();
        k4on.src = "images/buttons/forumas_on.jpg";
        k4off = new Image();
        k4off.src = "images/buttons/forumas_off.jpg";

        k5on = new Image();
        k5on.src = "images/buttons/nuorodos_on.jpg";
        k5off = new Image();
        k5off.src = "images/buttons/nuorodos_off.jpg";

        k6on = new Image();
        k6on.src = "images/buttons/kontaktai_on.jpg";
        k6off = new Image();
        k6off.src = "images/buttons/kontaktai_off.jpg";
                 }
function img_on(imgName) {
        if (show_ == 1) {
        imgOn = eval(imgName + "on.src");
        document [imgName].src = imgOn;
        }
}
function img_off(imgName) {
        if (show_ == 1) {
        imgOff = eval(imgName + "off.src");
        document [imgName].src = imgOff;
        }
}