// hide this stuff from other browsers
function getAppVersion() {
	appname= navigator.appName;
	appversion = navigator.appVersion;
	majorver = appversion.substring(0, 1);
	if ( (appname == "Netscape") && ( majorver >= 3 ) ) return 1;
	if ( (appname == "Microsoft Internet Explorer") && (majorver>= 4) ) return 1;
	return 0; }