Uprava javascriptu

<div id="_ctl0_Fmenu_PriceListByTypes" class="TableCss">
   <div  class="HeaderCss" align="left">
      <a href="..." id="PriceListByTypesFullLink">Kategória&nbsp;»</a>
   </div>
   <ul class="PLHidsMenu">
      <li  class="PL1"><span>...</span></li>
      <li  class="PL2"><a href="" title=""></a></li>
      <li  class="PL2"><a href="" title=""></a></li>
   </ul>   
</div>

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=/";
   }
};

http://expertcomp.sk/menu.html

$('.PL1').click(function () {
$('ul li.PL2').slideToggle('medium');
});