//Main Nav

function Browser() {

  var ua, s, i;

  this.isIE    = false;  // Internet Explorer
  this.isNS    = false;  // Netscape
  this.version = null;

  ua = navigator.userAgent;

  s = "MSIE";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isIE = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  s = "Netscape6/";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }



  // Treat any other "Gecko" browser as NS 6.1.

  s = "Gecko";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = 6.1;
    return;
  }
}

var browser = new Browser();

function removeClassName(el, name) {

  var i, curList, newList;

  if (el.className == null)
    return;

  // Remove the given class name from the element's className property.

  newList = new Array();
  curList = el.className.split(" ");
  for (i = 0; i < curList.length; i++)
    if (curList[i] != name)
      newList.push(curList[i]);
  el.className = newList.join(" ");
}

// Submenu links

var submenu=new Array()


submenu[0]='<a href="alessandro.htm">Alessandro Pacini</a>  | <a href="http://www.anteamurlo.it">AN.TE.A</a></li> | <a href="../index.html">Aliseda</a>'
submenu[1]='<a href="#">#</a> | <a href="#">#</a> | <a href="#">#</a> '
submenu[2]='<a href="#"></a> | <a href="#"></a> | <a href="#"></a> | <a href="#"</a> '
submenu[3]='<a href="lezioni.htm">Tecniche della oreficeria etrusca</a> | <a href="lessons.htm"><img src=immagini/bandiera_inglese.png width="45" height="18" border="0" align="top"> </a> '
submenu[4]='<a href="mailto:ale.pacini@gmail.com">Email</a>  | <a href="contatti.htm" target="_blank">Indirizzo</a> '


var menuobj=document.getElementById? document.getElementById("submenu") : document.all


var activeButton = null;

function buttonClick(event, which) {

  var button;

  // Get the target button element.

  if (browser.isIE)
    button = window.event.srcElement;
  else
    button = event.currentTarget;
	
  // Blur focus from the link to remove that annoying outline.

  button.blur();

  // Reset the currently active button, if any.

  if (activeButton != null)
    resetButton(activeButton);

  // Activate this button, unless it was the currently active one

  if (button != activeButton) {
    depressButton(button);
    activeButton = button;
	thecontent=(which==-1)? "" : submenu[which]
  }
  
  else {
    activeButton = null;
	thecontent = ""
  }
	
  menuobj.innerHTML=thecontent

  return false;
}

function depressButton(button) {
button.className += "active";
}

function resetButton(button) {
  removeClassName(button, "active");
}

function resetSub(button) {
  menuobj.innerHTML=""
}