//SNIFF
if(document.getElementById) {
	//alert("getElementById");
	var isdom=true;
} else if (document.all) {
	//alert("document.all");
	var isie=true;
} else if (document.layers) {
	//alert("document.layers");
	var isns=true;
}
var agent = navigator.userAgent.toLowerCase();
if (agent.indexOf("mac") != -1) {
	//alert("is Mac");
	var ismac=true;
}
//MENUS
var current_menu="";
function show_menu(layername)
{
	if(current_menu!="")
		hide_current_menu()
	if(isdom) {
		document.getElementById(layername).style.visibility='visible';
		document.getElementById('resetlayer').style.visibility='visible';
	} else if(isie) {
		document.all[layername].style.visibility='visible';
		document.all['resetlayer'].style.visibility='visible';
	} else if (isns) {
		document.layers[layername].visibility="visible";
		document.layers['resetlayer'].visibility="visible";
	}
	current_menu = layername;
}
function hide_current_menu()
{
	if(current_menu!="") {
		if(isdom) {
			document.getElementById(current_menu).style.visibility='hidden';
			document.getElementById('resetlayer').style.visibility='hidden';
		} else if(isie) {
			document.all[current_menu].style.visibility='hidden';
			document.all['resetlayer'].style.visibility='hidden';
		} else if (isns) {
			document.layers[current_menu].visibility="hide";
			document.layers['resetlayer'].visibility="hide";
		}
	}
}
// reload if ns4 resized
function ns_reload(init) {
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
	 document.pgW=innerWidth; document.pgH=innerHeight; onresize=ns_reload; }}
  else if (innerWidth!=document.pgW || innerHeight!=document.pgH) location.reload();
}
ns_reload(true);