browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
/* if (top.frames.length > 1)
   {
      top.location="menu.html";
    } */
           
        if (browserName == "Netscape" && browserVer >= 3) version ="n3";
        else {version = "n2"};
        if (navigator.appVersion.substring(0,3) == '4.0') {version = "n3"};
        if (version == "n3")        
        {
           nav1on = new Image; 
           nav1on.src = "images/buttons/button1a.gif";  
           
           nav1off = new Image; 
           nav1off.src = "images/buttons/button1n.gif";
          
           nav2on = new Image; 
           nav2on.src = "images/buttons/button2a.gif";  
           
           nav2off = new Image; 
           nav2off.src = "images/buttons/button2n.gif";
           
           nav3on = new Image; 
           nav3on.src = "images/buttons/button3a.gif";  
           
           nav3off = new Image; 
           nav3off.src = "images/buttons/button3n.gif";
           
           nav4on = new Image;
           nav4on.src = "images/buttons/button4a.gif";
           
           nav4off = new Image;
           nav4off.src = "images/buttons/button4n.gif";
           
           nav5on = new Image;
           nav5on.src = "images/buttons/button5a.gif";
           
           nav5off = new Image;
           nav5off.src = "images/buttons/button5n.gif";
           
           nav6on = new Image;
           nav6on.src = "images/buttons/button6a.gif";
           
           nav6off = new Image;
           nav6off.src = "images/buttons/button6n.gif";
           
           nav7on = new Image;
           nav7on.src = "images/buttons/button7a.gif";
           
           nav7off = new Image;
           nav7off.src = "images/buttons/button7n.gif";

           nav8on = new Image;
           nav8on.src = "images/buttons/button8a.gif";
           
           nav8off = new Image;
           nav8off.src = "images/buttons/button8n.gif";
           
           nav9on = new Image;
           nav9on.src = "images/buttons/button9a.gif";
           
           nav9off = new Image;
           nav9off.src = "images/buttons/button9n.gif";

           nav10on = new Image;
           nav10on.src = "images/buttons/button10a.gif";
           
           nav10off = new Image;
           nav10off.src = "images/buttons/button10n.gif";





           nav21on = new Image; 
           nav21on.src = "images/buttons/end_them1a.gif";  
           
           nav21off = new Image; 
           nav21off.src = "images/buttons/end_them1n.gif";
          
           nav22on = new Image; 
           nav22on.src = "images/buttons/end_them2a.gif";  
           
           nav22off = new Image; 
           nav22off.src = "images/buttons/end_them2n.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;
        }
    }