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("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=/";

 }

};