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

if ((browserName == "Netscape" && browserVer >= 3) || (browserName == "Microsoft Internet Explorer" && browserVer >= 4))
	version = "n3";
else 
	version = "n2";

if (version == "n3"){
    	show1on = new Image();	
	show1on.src = "../graphics/Navigation_bar/who_all.gif";
	show2on = new Image();	
 	show2on.src = "../graphics/Navigation_bar/ser_all.gif";
	show3on = new Image();	
	show3on.src = "../graphics/Navigation_bar/mar_all.gif";
	show4on = new Image();	
	show4on.src = "../graphics/Navigation_bar/pro_all.gif";
	show5on = new Image();	
	show5on.src = "../graphics/Navigation_bar/env_all.gif";
	show6on = new Image(); 	
	show6on.src = "../graphics/Navigation_bar/cle_all.gif";

	show1off = new Image();	
	show1off.src = "../graphics/Navigation_bar/who_new.gif";
	show2off = new Image();	
	show2off.src = "../graphics/Navigation_bar/ser_new.gif";
	show3off = new Image();	
	show3off.src = "../graphics/Navigation_bar/mar_new.gif";
	show4off = new Image();	
	show4off.src = "../graphics/Navigation_bar/pro_new.gif";
	show5off = new Image();	
	show5off.src = "../graphics/Navigation_bar/env_new.gif";
	show6off = new Image();	
	show6off.src = "../graphics/Navigation_bar/cle_new.gif";
}

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

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