var active = null;

function addItem(oid, text, pid, url)
   {
   pid = document.getElementById(pid);
   if (pid.getElementsByTagName("span").length == 0) pid = createTag("span", pid);
   else pid = pid.getElementsByTagName("span")[0];

   mi = createTag("div", pid);
   mi.id = oid;

   miImg = createTag("img", mi);
   miImg.align = "absbottom";
   miImg.className = "ico";

   mia = createTag("a", mi);
   mia.innerHTML = text;
   mia.className = "mi";
   mia.onclick = function (e) { mi_click(e) };
   mia.onfocus = function (e) { mi_focus(e) };
   if (url != null) mia.href = url;

   createTag("br", mi);
   }

function createTag(tag, pel)
   {
   el = document.createElement(tag);
   return pel.appendChild(el);
   }

function initMenu(act)
   {
   root = document.getElementById("menu");

   els = root.getElementsByTagName("a");
   for (i=0; i<els.length; i++)
      {   
      els[i].parentNode.className = els[i].parentNode.nextSibling != null ? "lsbg" : "ls";

      img = els[i].parentNode.getElementsByTagName("img")[0];
      if (els[i].parentNode.getElementsByTagName("span")[0] != null)
         { 
         els[i].parentNode.getElementsByTagName("span")[0].style.display = 'none';
         img.src = "article/plus.jpg";
         img.onclick = function (e) { img_click(e) };
         }
      else 
         img.src = els[i].parentNode.nextSibling != null ? "article/blank.jpg" : "article/blank.jpg";
      }

   if (act != null) node_open(act);
   }

function mi_click(e)
   {
   obj = eventHandler(e);
   node_activate(obj);
   if ((node = obj.parentNode.getElementsByTagName("span")[0]) == null) return;
   if (node.style.display != "block")
      {
      node.style.display = "block";
      obj.parentNode.firstChild.src = "article/open.jpg";
      }
   }


function img_click(e)
   {
   obj = eventHandler(e);
   if ((node=obj.parentNode.getElementsByTagName("span")[0]) == null) return;

   if (node.style.display != "block")
      {
      node.style.display = "block";
      obj.src = "article/open.jpg";
      }
   else
      {
      node.style.display = "none";
      obj.src = "article/plus.jpg";
      }
   }


function mi_focus(e)
   {
   obj = eventHandler(e);
   obj.blur();
   }


function node_open(node_id)
   {
   if ((node = document.getElementById(node_id)) == null) return;
   node_activate(node.getElementsByTagName("a")[0]);
   while (node.id != "0") 
      {
      node = node.parentNode;
      node.style.display = "block";
      if(node.tagName == "DIV") node.getElementsByTagName("img")[0].src = "article/open.jpg";
      }
   }


function node_activate(node_a)
   {
   if (active!=null) active.className = 'mi';
   active = node_a;
   active.className += 'act';
   }


function eventHandler(e)
   {
   return window.event ? window.event.srcElement : e.currentTarget;
   }