// browser check

var browserName = navigator.appName;
var browserVer = parseInt(navigator.appVersion);

if ( browserName == "Netscape" ) {
	if ( browserVer >= 4 ) {
		version = "n4"
	}
	else if ( browserVer >= 3 ) {
		version = "n3";
	}
	else {
		version = "na";
	}
}

else if ( browserName == "Microsoft Internet Explorer" ) {
	if ( browserVer >= 4 ) {
		version = "ie4";
	}
	else if ( browserVer >= 3 ) {
		verParts = (navigator.appVersion).split( "(" );
		browserVer = parseFloat( verParts[0] );
		if ( browserVer >= 3.02 ) {
			version = "ie3";
		}
		else {
			version = "na";
		}
	}
	else {
		version = "na";
	}
}

else {
	version = "na";
}

if ( version == "ie4" || version == "n4" || version == "n3" ) {
	imgok = 1;
}