// pulldown menu - Layer
function checkBrowser() {
   var browser;
   var bName = navigator.appName;
   var bVersion = parseInt(navigator.appVersion);
   
   if (bName == "Netscape" && bVersion == 2) browser = "Netscape2";
   else if (bName == "Netscape" && bVersion == 3) browser = "Netscape3";
   else if (bName == "Netscape" && bVersion >= 4) browser = "Netscape4";
   else if (bName == "Microsoft Internet Explorer" && bVersion >= 3 && bVersion<4) browser = "IE3";
   else if (bName == "Microsoft Internet Explorer" && bVersion >= 4) browser = "IE4";

   return browser;
}
	var ns4;
	var ie4;
	ns4 = (checkBrowser() == "Netscape4")? true:false;
	ie4 = (checkBrowser() == "IE4")? true:false;	
	
	//if (checkBrowser() == "Netscape4") ns4 = true;
	//if (checkBrowser() == "IE4") ie4 = true;	
	//Note : This doesn't always work!
	//ns4 = (document.layers)? true:false;
	//ie4 = (document.all)? true:false;
	
	cont = new Array(4)
	cont[0] = 0
	cont[1] = 0
	cont[2] = 0
	cont[3] = 0
	
function menu(id){
	
		if (ns4) {
			document.layers[id].visibility = "show"
		}
	
		else if (ie4) {
			document.all[id].style.visibility = "visible"
		}
	
	function mostra(id){
		if (ns4) {
			document.layers[id].visibility = "show"
		}
		else if (ie4) {
			document.all[id].style.visibility = "visible"
		}
	}
	
	
	function nascondi(id){
		if (ns4) {
			document.layers[id].visibility = "hide"
		}
		else if (ie4) {
			document.all[id].style.visibility = "hidden"
		}
} 
}