var timerState = false;

function browser_name() {
		var browser_name = navigator.appName;
		return browser_name;
	}

	function browser_version() {
		var browser_version = parseFloat(navigator.appVersion);
		return browser_version;
	}

	function browser_os() {
		if(navigator.appVersion.indexOf("Win95") > 0) return "WIN95";
		else if(navigator.appVersion.indexOf("Win16") > 0) return "WIN31";
		else if(navigator.appVersion.indexOf("WinNT") > 0) return "NT";
		else if(navigator.appVersion.indexOf("Mac") > 0) return "MAC";
		else if(navigator.appVersion.indexOf("UNIX") > 0) return "UNIX";
		else return "UNKNOWN";
	}

var browserOk = false;

if (browser_name() == "Netscape" && browser_version() >= 3.0) browserOk = true;
else if (browser_name() == "Microsoft Internet Explorer" && browser_version() >= 3.0) browserOk = true;

function chg_button(titlename, onoff) 
{

 if (browserOk == true) {
		if (onoff == "on") {
			document[titlename].src = "images/button_" + titlename + "_on.gif"
		}
		else
		{
			document[titlename].src = "images/button_" + titlename + "_off.gif";
		}
	}
}

function menu_on(which) {
	menu_off();
	stop_timer();
	document.all[which].style.visibility='visible';
	document.all[which].style.display='block';
}

function menu_off() {
	document.all.menu_youth.style.visibility='hidden';
	document.all.menu_about.style.visibility='hidden';
	document.all.menu_events.style.visibility='hidden';
	document.all.menu_care.style.visibility='hidden';
	document.all.menu_mycca.style.visibility='hidden';
	document.all.menu_av.style.visibility='hidden';
	
	menu_youth.style.display='none';
	menu_about.style.display='none';
	menu_events.style.display='none';
	menu_care.style.display='none';
	menu_mycca.style.display='none';
	menu_av.style.display='none';
}

function stop_timer () {
	if (timerState) {
		clearTimeout(timerApp);
		timerState = false;
	}
}

function start_timer () {
	stop_timer();
	timerState = true;
	timerApp = setTimeout('menu_off()',2000);
}