Salve!

Premetto di non avere assolutamente nessuna conoscenza di JS, mi limito a scaricare script (ovviamente free) ed inserirli nelle mie pagine. Ora, io ho un menù di questo tipo: quando clicco su una voce, sotto si apre una tendina, con un tot di bottoni. Sarebbe possibile inserire un'altro livello? Mi spiego: Io clicco su uno dei bottoni primari e si apre una tendina con un tot di bottoni; cliccando su uno di questo bottoni si apre un'altra tendina. E' possibile? Che codice dovrei aggiungere?

Vi posto il codice XHTML, JS e CSS.

codice:
<div id="my_menu" class="sdmenu">
<div class="collapsed">
<span>Capitoli principali</span>
Final Fantasy
Final Fantasy II
Final Fantasy III
Final Fantasy IV
Final Fantasy V
Final Fantasy VI
Final Fantasy VII
Final Fantasy VIII
Final Fantasy IX
Final Fantasy X
Final Fantasy X-2
Final Fantasy XI
Final Fantasy XII
Final Fantasy XIII
</div>
<div class="collapsed">
<span>Support Us</span>
Recommend Us
Link to Us
Web Resources</div>
<div class="collapsed">
<span>Partners</span>
JavaScript Kit
CSS Drive
CodingForums
CSS Examples</div>
<div class="collapsed">
<span>Test Current</span>
Current or not
Current or not
Current or not
Current or not</div>
</div>
codice:
div.sdmenu {
	position: absolute;
	top: 420px;
	width: 231px;
	font-family: Verdana, Arial, sans-serif;
	font-size: 10px;
	padding-bottom: 10px;
	background: url("graphic/menu_js/bg_menu.png") no-repeat right bottom;
	color: #fff;
}
div.sdmenu div {
	background: url("graphic/menu_js/expand_button.png") no-repeat top;
	overflow: hidden;
}
div.sdmenu div.collapsed {
	height: 20px;
}
div.sdmenu div span {
	display: block;
	padding: 5px 25px;
	font-weight: bold;
	color: white;
	background: url("graphic/menu_js/hide_button.png") no-repeat center;
	cursor: default;
}
div.sdmenu div.collapsed span {
	background-image: url("graphic/menu_js/expand_button.png");
}
div.sdmenu div a {
	width: 122px;
	margin-left: auto;
    margin-right: auto;
	text-align: left;
	padding: 5px 10px;
	background: url("graphic/menu_js/bg_exp_menu.png");
	display: block;
	color: #fff;
	text-decoration: none;
}
div.sdmenu div a:hover {
	background: url("graphic/menu_js/bg_exp_menu_hover.png");
	color: #fff;
	text-decoration: none;
}
codice:
function SDMenu(id) {
	if (!document.getElementById || !document.getElementsByTagName)
		return false;
	this.menu = document.getElementById(id);
	this.submenus = this.menu.getElementsByTagName("div");
	this.remember = false;
	this.speed = 4;
	this.markCurrent = false;
	this.oneSmOnly = true;
}

SDMenu.prototype.init = function() {
	var mainInstance = this;
	for (var i = 0; i < this.submenus.length; i++)
		this.submenus[i].getElementsByTagName("span")[0].onclick = function() {
			mainInstance.toggleMenu(this.parentNode);
		};
	if (this.markCurrent) {
		var links = this.menu.getElementsByTagName("a");
		for (var i = 0; i < links.length; i++)
			if (links[i].href == document.location.href) {
				links[i].className = "current";
				break;
			}
	}
	if (this.remember) {
		var regex = new RegExp("sdmenu_" + encodeURIComponent(this.menu.id) + "=([01]+)");
		var match = regex.exec(document.cookie);
		if (match) {
			var states = match[1].split("");
			for (var i = 0; i < states.length; i++)
				this.submenus[i].className = (states[i] == 0 ? "collapsed" : "");
		}
	}
};
SDMenu.prototype.toggleMenu = function(submenu) {
	if (submenu.className == "collapsed")
		this.expandMenu(submenu);
	else
		this.collapseMenu(submenu);
};
SDMenu.prototype.expandMenu = function(submenu) {
             var fullHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
		var links = submenu.getElementsByTagName("a");
	for (var i = 0; i < links.length; i++)
		fullHeight += links[i].offsetHeight;
	var moveBy = Math.round(this.speed * links.length);
	
	var mainInstance = this;
	var intId = setInterval(function() {
		var curHeight = submenu.offsetHeight;
		var newHeight = curHeight + moveBy;
		if (newHeight < fullHeight)
			submenu.style.height = newHeight + "px";
		else {
			clearInterval(intId);
			submenu.style.height = "";
			submenu.className = "";
			mainInstance.memorize();
		}
	}, 30);
	this.collapseOthers(submenu);
};
SDMenu.prototype.collapseMenu = function(submenu) {
	var minHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
	var moveBy = Math.round(this.speed * submenu.getElementsByTagName("a").length);
	var mainInstance = this;
	var intId = setInterval(function() {
		var curHeight = submenu.offsetHeight;
		var newHeight = curHeight - moveBy;
		if (newHeight > minHeight)
			submenu.style.height = newHeight + "px";
		else {
			clearInterval(intId);
			submenu.style.height = "";
			submenu.className = "collapsed";
			mainInstance.memorize();
		}
	}, 30);
};
SDMenu.prototype.collapseOthers = function(submenu) {
	if (this.oneSmOnly) {
		for (var i = 0; i < this.submenus.length; i++)
			if (this.submenus[i] != submenu && this.submenus[i].className != "collapsed")
				this.collapseMenu(this.submenus[i]);
	}
};
SDMenu.prototype.expandAll = function() {
	var oldOneSmOnly = this.oneSmOnly;
	this.oneSmOnly = false;
	for (var i = 0; i < this.submenus.length; i++)
		if (this.submenus[i].className == "collapsed")
			this.expandMenu(this.submenus[i]);
	this.oneSmOnly = oldOneSmOnly;
};
SDMenu.prototype.collapseAll = function() {
	for (var i = 0; i < this.submenus.length; i++)
		if (this.submenus[i].className != "collapsed")
			this.collapseMenu(this.submenus[i]);
};
SDMenu.prototype.memorize = function() {
	if (this.remember) {
		var states = new Array();
		for (var i = 0; i < this.submenus.length; i++)
			states.push(this.submenus[i].className == "collapsed" ? 0 : 1);
		var d = new Date();
		d.setTime(d.getTime() + (30 * 24 * 60 * 60 * 1000));
		document.cookie = "sdmenu_" + encodeURIComponent(this.menu.id) + "=" + states.join("") + "; expires=" + d.toGMTString() + "; path=/";
	}
};
Perdonate l'eccessiva lunghezza del post, non sapevo di preciso cosa potesse c'entrare. Grazie anticipatamente a chi mi risponderà.