NS4 = (document.layers);
IE4 = (document.all);
ver4 = (NS4 || IE4);
isMac = (navigator.appVersion.indexOf("Mac") != -1);
isMenu = (NS4 || (IE4 && !isMac));
function popUp(){return};
function popDown(){return};
function startIt(){return};
   var platform = navigator.appVersion;
isUNIX = (platform.indexOf("X11") != -1) ||
  (platform.indexOf("Linux") != -1) ||
  (platform.indexOf("SunOS") != -1) ||
  (platform.indexOf("IRIX") != -1) ||
   (platform.indexOf("HP-UX") != -1);

if (!ver4) event = null;
N4browser = ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) < 5 ));

browser = (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 3 )) || ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 )))