// This is      ***      MAIN     *** 

versMajor = parseInt(navigator.appVersion);
versMinor = parseFloat(navigator.appVersion);
agt = navigator.userAgent.toLowerCase();

//  msg = "Agent = " + agt; alert(msg);

isNav = false; isExp = false;

if (navigator.appName == "Netscape") 
          {
            isNav = true
          }
          else
          {
            isExp = true
}

ExpVers = 0; NavVers =0;

isExp4 = (isExp && (versMajor == 4) && (agt.indexOf("msie 5")==-1));
isExp5 = (isExp && (versMajor == 4) && (agt.indexOf("msie 5")!=-1));
isExp6 = (isExp && (versMajor == 4) && (agt.indexOf("msie 6")!=-1));

if (isExp4) {ExpVers = 4};
if (isExp5) {ExpVers = 5};
if (isExp6) {ExpVers = 6};

isNav4 = (isNav && (versMajor == 4))
isNav5 = (isNav && (versMajor == 5))
isNav6 = (isNav && (versMajor > 5))

if (isNav4) {NavVers = 4};
if (isNav5) {NavVers = 5};
if (isNav6) {NavVers = 6};