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") { 
    
    img21on = new Image();                    
    img21on.src = "images/0201on.gif";      
    img21off = new Image();              
    img21off.src = "images/0201.gif";
    
    img22on = new Image();                    
    img22on.src = "images/0202on.gif";      
    img22off = new Image();              
    img22off.src = "images/0202.gif";
    
    img23on = new Image();                    
    img23on.src = "images/0203on.gif";      
    img23off = new Image();              
    img23off.src = "images/0203.gif";
    
    img24on = new Image();                    
    img24on.src = "images/0204on.gif";      
    img24off = new Image();              
    img24off.src = "images/0204.gif";
    
    img25on = new Image();                    
    img25on.src = "images/0205on.gif";      
    img25off = new Image();              
    img25off.src = "images/0205.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");
    }
}