var isNew = 0;
var isNS4 = 0;
var isIE4 = 0;
var isGood = 0;
var brow = ((navigator.appName) + (parseInt(navigator.appVersion)));
if (parseInt(navigator.appVersion >= 5)) {
isNew = 1
}
else if (brow == "Netscape4") {
isNS4=1;
}
else if (brow == "Microsoft Internet Explorer4") {
isIE4 = 1;
}
isGood = isNew || isNS4 || isIE4;