var version;

function onLoad() {
 browserName = navigator.appName;
 browsonner = parseInt(navigator.appVersion);

 userAgent = navigator.userAgent;
   start = userAgent.indexOf("(");
   end = userAgent.indexOf(";");
   platform= userAgent.substring(start +1,end);  

        if (browserName == "Netscape" && browsonner >= 3) version = "n3";
        else version = "n2";
        if (browserName == "Microsoft Internet Explorer" && browsonner >= 4) version = "n3";
  
        if ((version == "n3")) { 
        nav01on = new Image();
        nav01on.src = "image/nav01b.gif";
        nav02on = new Image(); 
        nav02on.src = "image/nav02b.gif";
        nav03on = new Image();
        nav03on.src = "image/nav03b.gif";
        nav04on = new Image();
        nav04on.src = "image/nav04b_new.gif";

 
        nav01off = new Image(); 
        nav01off.src = "image/nav01a.gif";
        nav02off = new Image();
        nav02off.src = "image/nav02a.gif";
        nav03off = new Image();
        nav03off.src = "image/nav03a.gif";
        nav04off = new Image();
        nav04off.src = "image/nav04a_new.gif";


        }
       if (version == "n3")
        {
        nav01blurb = "Welcome to API Seminars";
        nav02blurb = "API Seminars and Workshop Schedules";
        nav03blurb = "About API";
        nav04blurb = "Contact API";


        }
}

onLoad();

function img_act(imgName) {
        if ((version == "n3")) {
        imgOn = eval(imgName + "on.src");
        document [imgName].src = imgOn;
        blurbNum= eval(imgName + "blurb")
        self.status = blurbNum
        }
       else if (version=="n3")
        {
        blurbNum= eval(imgName + "blurb")
        self.status = blurbNum
        }
       else
        return;

}

function img_inact(imgName) {
        if ((version == "n3")) {
        imgOff = eval(imgName + "off.src");
        document [imgName].src = imgOff;
        self.status =" ";
        }
       else if (version=="n3")
        {
        self.status =" ";
        }
       else

        return;

}