browserName = navigator.appName;          
browserVer = parseInt(navigator.appVersion); 
if ((browserName == "Netscape" && browserVer >= 3) || (browserVer > 3)) version = "n3";
            else version = "n2";
            
            if (version == "n3") {
            Aon = new Image();
            Aon.src = "image/nv_23.gif";  
                        
			

            Aoff = new Image();
            Aoff.src = "image/nv_22.gif";              
            
               
			}

function select(imgName) {
            if (version == "n3") {             
            document.images['A'].src = Aoff.src;   

            document.images[imgName].src = eval(imgName + "on.src");
			}
    }

    function deselect(imgName) {
            if (version == "n3") {                 
            document.images[imgName].src = eval(imgName + "off.src");
			}
    }