function SDMenu(id) {
	if (!document.getElementById || !document.getElementsByTagName)
		return false;
	this.menu = document.getElementById(id);
	this.submenus = this.menu.getElementsByTagName("div");
	this.remember = true;
	this.speed = 3;
	this.markCurrent = false;
	this.oneSmOnly = true;
	this.inAction = new Array();
}
SDMenu.prototype.init = function() {
	var mainInstance = this;
	for (var i = 0; i < this.submenus.length; i++) {
		this.inAction[i] = false;
		this.submenus[i].getElementsByTagName("span")[0].onclick = function() {
			mainInstance.toggleMenu(this.parentNode, i);
		};
	}
	if (this.markCurrent) {
		var links = this.menu.getElementsByTagName("p");
		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" : "");
		}
	}*/
	
	// Toujours ouvrir que le premier
	for (var i = 0; i < this.submenus.length; i++) {
		if( i != 0 )
			this.submenus[i].className = "collapsed";
	}
};
SDMenu.prototype.toggleMenu = function(submenu, idMenu) {
	if (submenu.className == "collapsed")
		this.expandMenu(submenu, idMenu);
	else
		this.collapseMenu(submenu, idMenu);
};
SDMenu.prototype.expandMenu = function(submenu, idMenu) {
	
	if( this.inAction[idMenu] == false || typeof this.inAction[idMenu] == "undefined" ) {

		this.inAction[idMenu] = true;
		var fullHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
		var links = submenu.getElementsByTagName("p");
		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;
			submenu.className = "";
			if (newHeight < fullHeight)
				submenu.style.height = newHeight + "px";
			else {
				clearInterval(intId);
				submenu.style.height = "";
				mainInstance.memorize();
				mainInstance.inAction[idMenu] = false;
			}
		}, 30);
		this.collapseOthers(submenu);
	}
};
SDMenu.prototype.collapseMenu = function(submenu, idMenu) {

	if( this.inAction[idMenu] == false || typeof this.inAction[idMenu] == "undefined" ) {	
		
		this.inAction[idMenu] = true;
		var minHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
		var moveBy = Math.round(this.speed * submenu.getElementsByTagName("p").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();
				mainInstance.inAction[idMenu] = false;
			}
		}, 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], 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], 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], 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=/";
	}
};