bName = navigator.appName;
bVer = parseInt(navigator.appVersion);
    if ((bName == "Netscape" && bVer >= 3) || 
        (bName == "Microsoft Internet Explorer" && bVer >= 4)) br = "n3"; 
    else br = "n2";

    if (br== "n3") { 
    
   
    
    img41on = new Image();                    
    img41on.src = "images/0401on.gif";      
    img41off = new Image();              
    img41off.src = "images/0401.gif";
    
    img42on = new Image();                    
    img42on.src = "images/0402on.gif";      
    img42off = new Image();              
    img42off.src = "images/0402.gif";

    img43on = new Image();                    
    img43on.src = "images/0403on.gif";      
    img43off = new Image();              
    img43off.src = "images/0403.gif";
    
    img44on = new Image();                    
    img44on.src = "images/0404on.gif";      
    img44off = new Image();              
    img44off.src = "images/0404.gif";
   
    img45on = new Image();                    
    img45on.src = "images/0405on.gif";      
    img45off = new Image();              
    img45off.src = "images/0405.gif";

    img46on = new Image();                    
    img46on.src = "images/0406on.gif";      
    img46off = new Image();              
    img46off.src = "images/0406.gif";

  
    
    }
// Function to "activate" images.
function imgAct(imgName) {
    if (br == "n3") {
    document[imgName].src = eval(imgName + "on.src");
    }
}
// Function to "deactivate" images.
function imgInact(imgName) {
    if (br == "n3") {
    document[imgName].src = eval(imgName + "off.src");
    }
}