var myMenu;

if (window.addEventListener)
window.addEventListener("load", SDMenuInitialize, false)
else if (window.attachEvent)
window.attachEvent("onload", SDMenuInitialize)

function setCookie(c_name,value,expiredays){
  var exdate=new Date();exdate.setDate(exdate.getDate()+expiredays);
  document.cookie=c_name+ "=" +escape(value)+ ((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}
function getCookie(c_name){
  if (document.cookie.length>0){
    c_start=document.cookie.indexOf(c_name + "=");
    if (c_start!=-1){ 
      c_start=c_start + c_name.length+1; 
      c_end=document.cookie.indexOf(";",c_start);
      if (c_end==-1) c_end=document.cookie.length;
      return unescape(document.cookie.substring(c_start,c_end));
    } 
  }
  return "";
}
function SDMenuInitialize() {
    myMenu = new SDMenu("my_menu");
    myMenu.speed = 3;                    // Menu sliding speed (1 - 5 recomended)
    myMenu.remember = true;              // Store menu states (expanded or collapsed) in cookie and restore later
    myMenu.oneSmOnly = true;             // One expanded submenu at a time
    myMenu.markCurrent = true;           // Mark current link / page (link.href == location.href)
    myMenu.collapseOnStart = collapseOnStart; 
    myMenu.init();
    myObj = document.getElementById('my_menu')
    myObj.style.display = 'block'

};
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 = true;
}
SDMenu.prototype.init = function() {
	var mainInstance = this;
        if (this.submenus.length) {
	  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 CurrentFound = false
		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";
                                CurrentFound = true;
                                setCookie("SDM_LastLink",i);
				break;
			}
                if (CurrentFound == false){
                  var LastCurrent = parseInt(getCookie("SDM_LastLink"));
                  if (LastCurrent){
                    var links = this.menu.getElementsByTagName("a");
                    links[LastCurrent].className = "current";
                  }
                }
	}
        if (this.submenus.length) {
	    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++)
			  if (this.collapseOnStart) {
			    this.submenus[i].style.height = 45 + "px";
			    this.submenus[i].className = "collapsed"
			    mainInstance.memorize();}
			  else   {
			    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 fullHeight = 0;                              //Piet: the header (span) now also includes an a (anchor)
	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=/";
	}
};