window.onerror=null;
browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion.substring(0,4));

if((browserName=="Netscape" && browserVer >= 3) || (browserName=="Microsoft Internet Explorer" && browserVer >= 4)) ver = "yes";
else ver = "no";

if(ver == "yes") {
         a1 = new Image(); a1.src ="/gfx/menu_2a.gif";
         a2 = new Image(); a2.src ="/gfx/menu_2b.gif";

         b1 = new Image(); b1.src ="/gfx/menu_3a.gif";
         b2 = new Image(); b2.src ="/gfx/menu_3b.gif";

         c1 = new Image(); c1.src ="/gfx/menu_4a.gif";
         c2 = new Image(); c2.src ="/gfx/menu_4b.gif";

         d1 = new Image(); d1.src ="/gfx/menu_5a.gif";
         d2 = new Image(); d2.src ="/gfx/menu_5b.gif";

}

function active(imgName)
{
        if (ver == "yes")  {
                img1 = eval(imgName + "1.src");
                        document [imgName].src = img1;
        }
}



function inactive(imgName)
{
        if (ver == "yes")  {
                img2 = eval(imgName + "2.src");
                document [imgName].src = img2;
            }
}