brName = navigator.appName;
brVer = parseInt(navigator.appVersion);
var ch = false;

if ( ( brName == "Netscape" ) && ( brVer >= 3 ) ) {
	ch = true;
} else {
	ch = false;
}

if ( ( brName == "Microsoft Internet Explorer") && ( brVer >= 3 ) ) {
	ch = true;
} else {
	ch = false;
}

function imgOn( img, chg ) {
	document[img].src = chg;
}

function imgOff( img, chg ) {
	document[img].src = chg;
}

if ( ch == true ) {
	a=new Image;a.src="images/menu_right.gif";
	b=new Image;b.src="images/menu_right_over.gif";
}