var theAgent=navigator.userAgent
function getAppVersion() {
        appstr = navigator.userAgent;
                if ((navigator.userAgent.indexOf("Mozilla/3.0") != -1) ||  
                    (navigator.userAgent.indexOf("Mozilla/4") != -1))
                return 1;
        return 0;
}

if (getAppVersion())

{        EnglishOn = new Image;  EnglishOn.src = "Graphics/english-lg.gif";
         EnglishOff = new Image;    EnglishOff.src = "Graphics/english.gif";

         FrenchOn = new Image;   FrenchOn.src = "Graphics/french-lg.gif";
         FrenchOff = new Image;  FrenchOff.src = "Graphics/french.gif";

}

function imageOn(imgName)
    { if (ver== "n3") {imgOn= eval(imgName+"On.src");
      document.images[imgName].src= imgOn;}}

function imageOff(imgName)
    { if (getAppVersion()) {imgOff= eval(imgName+"Off.src");
      document.images[imgName].src= imgOff;}}

function imageOn(imgName)
    { if (getAppVersion()) {imgOn= eval(imgName+"On.src");
      document.images[imgName].src= imgOn;}}