function SDMenu(id) {
	if (!document.getElementById || !document.getElementsByTagName)
		return false;
		
	this.shouldRun = true;
	
	if(document.getElementById(id)) {
	  this.menu = document.getElementById(id);
	  this.submenus = this.menu.getElementsByTagName("div");
	} else {
	  this.shouldRun = false;
	}
	
	this.remember = true;
	this.speed = 3;
	this.markCurrent = true;
	this.oneSmOnly = true;
}
SDMenu.prototype.init = function() {
  if(this.shouldRun) {
	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++)
			for (var i = 0; i < this.submenus.length; i++)
			  if(this.submenus[i].getElementsByTagName("span")[0].getElementsByTagName("a").length > 0) {
			    this.submenus[i].className = "linkonly";
			  } else {
				//this.submenus[i].className = (states[i] == 0 ? "collapsed" : "");
				this.submenus[i].className = "collapsed";
			}
		//}
	}
  }
};
SDMenu.prototype.toggleMenu = function(submenu) {
if(this.shouldRun) {
//alert('1');
	if (submenu.className == "collapsed")
		this.expandMenu(submenu);
	else
		this.collapseMenu(submenu);
}		
};
SDMenu.prototype.expandMenu = function(submenu) {
if(this.shouldRun) {
//alert('2');
	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);

	if(submenu.getElementsByTagName("span")[0].getElementsByTagName("a").length > 0) {
	//alert('a');
	} else {
	
	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) {
if(this.shouldRun) {
//alert('3');
	var minHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
	var moveBy = Math.round(this.speed * submenu.getElementsByTagName("a").length);
	var mainInstance = this;
	
	if(submenu.getElementsByTagName("span")[0].getElementsByTagName("a").length > 0) {
	//alert('a');
	} else {
	
	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.shouldRun) {
//alert('4');
	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() {
if(this.shouldRun) {
//alert('5');
	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() {
//alert('6');
if(this.shouldRun) {
	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.shouldRun) {
//alert('7');
	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=/";
	}
}
};