bName = navigator.appName;
bVer = parseInt(navigator.appVersion);

var NN4 = (bName == "Netscape" && bVer == 4);
var NN6 = (bName == "Netscape" && bVer >= 5);
var IE4 = (bName == "Microsoft Internet Explorer" && bVer == 4);
var IE5 = (document.all && document.getElementById)? true : false;
var LLn = 6;
var DLn = "tag";
var t = 0;

timerID = 10;
function cleartime(){
	clearTimeout(timerID);
}
function hideLay(){
	timerID = setTimeout("hideAll()", t);
}


//
function hideAll(){
cleartime();
	if((NN6 == true) || (IE5 == true)){
		for(i = 1 ; i <= LLn ; i++){
			document.getElementById(DLn + i).style.visibility = "hidden";
		}
	}
	else if(IE4 == true){
		for(i = 1 ; i <= LLn ; i++){
			document.all(DLn + i).style.visibility = "hidden";
		}
	}
	else if(NN4){
		for(i = 1 ; i <= LLn ; i++){
			document.layers[DLn + i].visibility = "hidden";
		}
	}
}

//
function showMenu(layName){
	hideAll();
	if((NN6 == true) || (IE5 == true)){
		if((document.getElementById(layName).style.visibility) == "hidden"){
			document.getElementById(layName).style.visibility = "visible";
		}
	}
	else if(IE4 == true){
		if((document.all(layName).style.visibility) == "hidden"){
			document.all(layName).style.visibility = "visible";
		}
	}
	else if(NN4 == true){
		if((document.layers[layName].visibility) == "hide"){
			document.layers[layName].visibility = "show";
		}
	}
}