bName = navigator.appName;
bVer = parseInt(navigator.appVersion);
if ((bName == "Netscape" && bVer >= 3) ||
(bName == "Microsoft Internet Explorer" && bVer >= 4)) br = "n3";
else br = "n2";

if (br == "n3") {
img1on = new Image( );
img1on.src  = "images/nav1_on.gif";	
img2on = new Image( );
img2on.src  = "images/nav2_on.gif";	
img3on = new Image( );
img3on.src  = "images/nav3_on.gif";
img4on = new Image( );
img4on.src  = "images/nav4_on.gif";
img5on = new Image( );
img5on.src  = "images/nav5_on.gif";
img6on = new Image( );
img6on.src  = "images/nav6_on.gif";

img1off = new Image( );
img1off.src  = "images/nav1_off.gif";
img2off = new Image( );
img2off.src  = "images/nav2_off.gif";	
img3off = new Image( );
img3off.src  = "images/nav3_off.gif";
img4off = new Image( );
img4off.src  = "images/nav4_off.gif";
img5off = new Image( );
img5off.src  = "images/nav5_off.gif";
img6off = new Image( );
img6off.src  = "images/nav6_off.gif";
}

function imgAct(imgName) {
	if (br == "n3") {
	document[imgName].src = eval(imgName + "on.src");
	}
}

function imgInact(imgName) {
	if (br == "n3") {
	document[imgName].src = eval(imgName + "off.src");
	}
}