//colore del link al mouseover
var linkon = "#50b947";
//colore del link del menu normale
var linkoff = "#ffffff";

//gestione della evidenziazione del percorso di navigazione
var currLevel = new Array(null, null, null);
var aTags = document.getElementsByTagName("a");

//traccia dei sottomenu
var menuopen = null;
var submenuopen = null;
var submenuopenexist = null;

function ShowMenu(source, name)
{
	if (menuopen)
	{
		if (IE4_NS6) 
		{
			HideLink(1);
			document.getElementById(menuopen).style.visibility = 'hidden';
			}
		if (NS4) document.layers[menuopen].visibility = 'hidden';
		}
	if (submenuopen) HideSubmenu();
	menuopen = name;
	if (IE4_NS6) 
	{
		ShowLink(source, 0);
		document.getElementById(menuopen).style.visibility = 'visible';
		}
	if (NS4) document.layers[menuopen].visibility = 'show';
	}

function ShowSubmenu(source, name, exist)
{
	if (submenuopen) HideSubmenu();
	if (IE4_NS6) ShowLink(source, 1);
	if (exist) 
	{
		if (IE4_NS6) document.getElementById(name).style.visibility = 'visible';
		if (NS4) document.layers[name].visibility = 'show';
		}
	submenuopen = name;
	submenuopenexist = exist;
	}
	
function HideLink(level)
{
	if (currLevel[level] != null) aTags[currLevel[level]].style.color = linkoff;
	}

function ShowLink(source, level)
{
	HideLink(level);
	for (i = 0; i < aTags.length; i++) 
		if (aTags[i].innerText == source.innerText) 
		{
			currLevel[level] = i;
			break;
			}
	aTags[currLevel[level]].style.color = linkon;
	}

function HideSubmenu()
{
	if (submenuopenexist)
	{
		if (IE4_NS6) 
		{
			HideLink(2);
			document.getElementById(submenuopen).style.visibility = 'hidden';
			}
		if (NS4) document.layers[submenuopen].visibility = 'hidden';
		}
	submenuopen = null;
	submenuopenexist = null;
	}

function Reload()
{
	if (document.layers) window.location = this.location;
	}

function changeImage(img)
{
	if (document.images)
	{
		if (NS4) document.layers["top2"].document.images["logo"].src = img;
		if (IE4_NS6) document.images['logo'].src = img;
		}
	}