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 = true;
	this.oneSmOnly = false;
}

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("sdaws_" + encodeURIComponent(this.menu.id) + "=([0-9]+)");
		var match = regex.exec(document.cookie);
		if (match) 
		{
			var states = match[1].split("");
			for (var i = 0; i < states.length; i++)
			{
				if (states[i] == 0)
				{
					this.submenus[i].className = "collapsed";
				}
				else if (states[i] == 2)
				{
					this.submenus[i].className = "nonExpanding";
				}
				else
				{
				   this.submenus[i].className = "expanded";
				}
			}
		}
	}
};

SDMenu.prototype.toggleMenu = function(submenu) 
{
	if (submenu.className == "collapsed")
		this.expandMenu(submenu);
	else if (submenu.className == "nonExpanding")
	  return; 
	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 = "expanded";
			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";
			submenu.className = "expanded";
		}
		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 == "expanded")
				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 == "expanded")
			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++)
		{
			var value = 1;
			if (this.submenus[i].className == "collapsed")
			{
				value = 0; 
			}
			else if (this.submenus[i].className == "nonExpanding")
			{
				value = 2; 
			}
			states.push(value);
		}
		var d = new Date();
		d.setTime(d.getTime() + (30 * 24 * 60 * 60 * 1000));
		document.cookie = "sdaws_" + encodeURIComponent(this.menu.id) + "=" + states.join("") + "; expires=" + d.toGMTString() + "; path=/";
	}
};

function InsertNavigation(id) 
{
	var content = "\
      <div class=\"collapsed\">\
        <span>About SDAWS</span>\
          <a href=\"/AboutSDAWS/Achievements\">Achievements </a>\
          <a href=\"/AboutSDAWS/Mentors\">Mentors </a>\
      </div>\
      <div class=\"collapsed\">\
        <span>Events</span>\
          <a href=\"/Events/Calendar\">Calendar </a>\
      </div>\
      <div class=\"collapsed\">\
        <span>News</span>\
          <a href=\"/News/Newsletters\">Newsletters </a>\
          <a href=\"/News/Articles\">Articles </a>\
      </div>\
      <div class=\"collapsed\">\
        <span>Winemaking</span>\
          <a href=\"/discus/messages/7/7.html?1237047623\">Reference </a>\
          <a href=\"/discus/messages/6/6.html?1237047606\">Forum </a>\
          <a href=\"/discus/messages/5/5.html?1237047577\">FAQ </a>\
      </div>\
      <div class=\"collapsed\">\
        <span>Grape Growing</span>\
          <a href=\"/discus/messages/10/10.html?1237047756\">Reference </a>\
          <a href=\"/discus/messages/9/9.html?1237047741\">Forum </a>\
          <a href=\"/discus/messages/8/8.html?1237047726\">FAQ </a>\
      </div>\
      <div class=\"nonExpanding\">\
         <span><a href=\"/discus/messages/12/12.html?1237227985\">Classifieds</a></span>\
      </div>\
      <div class=\"nonExpanding\">\
         <span><a href=\"/Photos\">Photos</a></span>\
      </div>\
      <div class=\"nonExpanding\">\
			   <span><a href=\"/Resources\">Resources</a></span>\
      </div>\
      <div class=\"nonExpanding\">\
		 	   <span><a href=\"/Contact\">Contact</a></span>\
      </div>\
   ";

   document.getElementById(id).innerHTML =  content;

   var myMenu;
   myMenu = new SDMenu("my_menu");
   myMenu.speed = 4;           // Menu sliding speed (1 - 5 recomended)
   myMenu.remember = true;     // Store menu states (expanded or collapsed) in cookie and restore later
   myMenu.oneSmOnly = false;   // One expanded submenu at a time
   myMenu.markCurrent = false;  // Mark current link / page (link.href == location.href)
   myMenu.init();

};