var old_Id=-1;
var timer=-1;

var DOM2=(document.getElementById)?1:0;
var IE4 =(document.all) ? 1:0;
var NS4 =(document.layers) ? 1:0;

if (NS4 && DOM2) NS4=0;

/*Pass -1 to hide all menus otherwise the number of menu to display*/
/*The name of the layer should be "subMenu"+number*/
function see(myId){
	
	if(myId<0){
		activeEl="subMenu"+old_Id;
		if(NS4){
			timer=setTimeout("document.layers[activeEl].visibility='hide'",1000);
		} else {
			timer=setTimeout("document.getElementById(activeEl).style.visibility='hidden'",500);
		}
	}
/*The first DIV is never displayed because it's a logo element*/
	if (myId>1){
		for (j=2;j<menu_length;j++){
			if(NS4){ 
				thisLayer="subMenu"+j;
				document.layers[thisLayer].visibility="hide";
			} else { 
				document.getElementById("subMenu"+j).style.visibility="hidden";
			}
		}
		if(timer>0){
			window.clearTimeout(timer);
		}
		if(NS4){
			thisLayer="subMenu"+myId;
			parentLayer="menu"+myId;
			document.layers[thisLayer].moveTo(document.layers[parentLayer].pageX,document.layers[parentLayer].pageY-10);
			document.layers[thisLayer].visibility="show";
		} else {
			
			document.getElementById("subMenu"+myId).style.top=document.getElementById("menu"+myId).offsetTop-10;
			document.getElementById("subMenu"+myId).style.visibility="visible";
			//alert(document.getElementById("subMenu"+myId).offsetTop);
		}
		//old_Id=myId;
	}
	
	if (myId >= 0)
		old_Id=myId;
	
}

function seeNS(myId){
//questa funzione filtra le chiamate solo per NS4 sono attivi i comandi sui link perche' non sono validi quelli sul DIV

	if(NS4){
		see(myId);
	} else {
		return false;
	}
}