bName = navigator.appName;
bVer = parseInt(navigator.appVersion); 

        if  ((bName == "Netscape" && bVer >= 3) || (bName == "Microsoft Internet Explorer" && bVer >= 4)) ver = "good";

        else ver = "bad"; 

             

     function img_act(imgName) {

             if (ver == "good") {

             imgOn = eval(imgName + "on.src");

             document[imgName].src = imgOn;

             }
     }

     function img_inact(imgName) {

             if (ver == "good") {

             imgOff = eval(imgName + "off.src");

             document[imgName].src = imgOff;

             }

     }


     function alt_act(imgName) {

             if (ver == "good") {

             document["pic"].src = eval(imgName + ".src");

             }

     }


     function alt_inact(imgName) {
 
            if (ver == "good") {

             document["pic"].src = p0.src

             }

     }



if (ver == "good") {


             p0 = new Image();

             p0.src = "pics/0.gif";

             p1 = new Image();

             p1.src = "pics/1.gif";

}