n6 = (navigator.userAgent.indexOf("Gecko")!=-1);
ns4 = (document.layers)? true:false;
ie4 = (document.all)? true:false;
ng5 = (document.getElementById) ? true:false

dropsloaded=0
timerID=null

var h_offset = 0;
var left_offset = 0;

function RollOver(imageID,imageName)
	{document.images[imageID].src = eval(imageName + ".src");}

function accendi(nome,n_lay) {
		if(document[nome]) {
		if (ie4){
		obj=eval("document.all['"+n_lay+"'].document."+nome);}
		document[nome].src = eval(nome + "on.src");
        obj.src=eval(nome + "on.src");
		} else {
		if (ng5){
		obj=eval("document.getElementById['"+n_lay+"'].document."+nome);
        obj.src=eval(nome + "on.src");}
		if (ns4){
		obj=eval("document.layers['"+n_lay+"'].document."+nome);
        obj.src=eval(nome + "on.src");}
		if (ie4){
		obj=eval("document.all['"+n_lay+"'].document."+nome);
        obj.src=eval(nome + "on.src");}
        }
}

function spegni(nome,n_lay) {
		if(document[nome]) {
		if (ie4){
		obj=eval("document.all['"+n_lay+"'].document."+nome);}
		document[nome].src = eval(nome + "off.src");
        obj.src=eval(nome + "off.src");
		} else {
		if (ng5){
		obj=eval("document.getElementById['"+n_lay+"'].document."+nome);
        obj.src=eval(nome + "off.src");}
		if (ns4){
		obj=eval("document.layers['"+n_lay+"'].document."+nome);
        obj.src=eval(nome + "off.src");
        }
		if (ie4){
		obj=eval("document.all['"+n_lay+"'].document."+nome);
        obj.src=eval(nome + "off.src");}
        			}
}
function off_all_lay() {
		if (ng5) document.getElementById('menu1').style.visibility = "hidden"
		else if (ns4) document.menu1.visibility = "hide"
		else if (ie4) menu1.style.visibility ="hidden"

		if (ng5) document.getElementById('menu2').style.visibility = "hidden"
		else if (ns4) document.menu2.visibility = "hide"
		else if (ie4) menu2.style.visibility ="hidden"

		if (ng5) document.getElementById('menu3').style.visibility = "hidden"
		else if (ns4) document.menu3.visibility = "hide"
		else if (ie4) menu3.style.visibility ="hidden"

		if (ng5) document.getElementById('menu4').style.visibility = "hidden"
		else if (ns4) document.menu3.visibility = "hide"
		else if (ie4) menu3.style.visibility ="hidden"

		if (ng5) document.getElementById('menu5').style.visibility = "hidden"
		else if (ns4) document.menu5.visibility = "hide"
		else if (ie4) menu5.style.visibility ="hidden"
}

function onlay(n) {
clearTimeout(timerID)
off_all_lay();
if (ng5) document.getElementById('menu' + n).style.visibility = "visible";
else if (ns4) document.layers["menu" + n].visibility = "show";
else if (ie4) document.all["menu" + n].style.visibility = "visible";
}

function offlay(){
	if(ng5) {timerID=window.setTimeout('off_all_lay()',300); return}
	if(ie4) {timerID=window.setTimeout('off_all_lay()',300); return}
	if(ns4) {timerID=window.setTimeout('off_all_lay()',300); return}
}

function keepdrop(){
	clearTimeout(timerID)
}

function offlayns(){
	if (navigator.appName == "Netscape") {offlay() }
	// if (ng5) {offlay() }
}

function init(){
	off_all_lay();
//	muovi_layers();
}