var version="0";

bName = navigator.appName;             
bVer = parseInt(navigator.appVersion);
if      (bName == "Netscape" && bVer >= 3) version = "n3";
else if (bName == "Microsoft Internet Explorer" && bVer >= 2) version = "n3";

if (version == "n3")
             {
             tilbage1on = new Image(54,15);tilbage1on.src = "../../../pics/tilbage01-rod.gif";
             tilbage2on = new Image(54,15);tilbage2on.src = "../../../pics/tilbage01-rod.gif";
                         
             tilbage1off = new Image(54,15);tilbage1off.src = "../../../pics/tilbage01-blaa.gif";
             tilbage2off = new Image(54,15);tilbage2off.src = "../../../pics/tilbage01-blaa.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; }
     }