var 	navVer = navigator.appVersion;
var	IEmenuJS = '<script language=\"JavaScript\" src=\"iemenu.js\\index.html"></script>';
var	NSmenuJS = '<script language=\"JavaScript\" src=\"nsmenu.js\\index.html"></script>';

if(navVer.substr(0,3) >= 4) {
if(navigator.appName == 'Netscape') {
document.write(NSmenuJS);
} else {
document.write(IEmenuJS);
}
}