browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
         if ((browserName == "Netscape" && browserVer >= 3)||
             (browserName == "Microsoft Internet Explorer" && browserVer >=4)) version = "n3";
        else version = "x";
        if (version == "n3")
 {    
        Aon = new Image;
        Aon.src = "/img/en/menu_top_01_on.gif";
        Bon = new Image;
        Bon.src = "/img/en/menu_top_02_on.gif";
        Con = new Image;
        Con.src = "/img/en/menu_top_03_on.gif";
        Don = new Image;
        Don.src = "/img/en/menu_top_04_on.gif";
        Eon = new Image;
        Eon.src = "/img/en/menu_top_05_on.gif";
        
        Aoff = new Image;
        Aoff.src = "/img/en/menu_top_01_off.gif";
        Boff = new Image;
        Boff.src = "/img/en/menu_top_02_off.gif";
        Coff = new Image;
        Coff.src = "/img/en/menu_top_03_off.gif";
        Doff = new Image;
        Doff.src = "/img/en/menu_top_04_off.gif";
        Eoff = new Image;
        Eoff.src = "/img/en/menu_top_05_off.gif";
}
function img_act(imgName)
{
        if (version == "n3") 
        {
        imgOn = eval(imgName + "on.src");
        document [imgName].src = imgOn;
        }
}
function img_inact(imgName)
{
        if (version == "n3") 
        {
        imgOff = eval(imgName + "off.src");
        document [imgName].src = imgOff;
        }
}