// Autorem skryptu jest: SŁAWOMIR KOKŁOWSKI
// www.kurshtml.boo.pl
// Jeśli chcesz wykorzystać ten skrypt na swojej stronie, nie usuwaj tego komentarza!


function tree(id) {
   this.id = id;
   this.click = function ()
   {
     for (var i = 0, el_node; i < this.parentNode.childNodes.length; i++)
     {
       el_node = this.parentNode.childNodes.item(i)
       if (el_node.nodeName.toLowerCase() == 'ul')
       {
         el_node.style.display = el_node.style.display == 'none' ? 'block' : 'none';
         this.parentNode.style.backgroundImage = 'url("' + (el_node.style.display == 'none' ? 'graphics/folder_closed' : 'graphics/folder_open') + '.png")';
         return;
       }
     }
   }
 
   this.start = function (el)
   {
     for (var i = 0, el_node; i < el.childNodes.length; i++)
     {
       el_node = el.childNodes.item(i);
       if (el_node.nodeName.toLowerCase() == 'a')
       {
         el_node.onclick = this.click;
         for (var j = 0; j < el_node.parentNode.childNodes.length; j++)
         {
           if (el_node.parentNode.childNodes.item(j).nodeName.toLowerCase() == 'ul')
           {
             el_node.parentNode.style.backgroundImage = 'url("graphics/folder_closed.png")';
             el_node.className = (el_node.className ? el_node.className + ' ' : '') + 'folder';
             break;
           }
           if (el_node.parentNode.childNodes.item(j).nodeName.toLowerCase() == 'li') break;
         }
         if (el_node.href && unescape(el_node.href) == unescape(window.location.href))
         {
           el_node.className = 'active';
           var el_parentNode = el_node;
           do
           {
             el_parentNode = el_parentNode.parentNode;
             if (el_parentNode.nodeName.toLowerCase() == 'ul')
             {
               el_parentNode.style.display = 'block';
               if (document.getElementById(this.id) != el_parentNode) el_parentNode.parentNode.style.backgroundImage = 'url("graphics/folder_open.png")';
             }
           }
           while (document.getElementById(this.id) != el_parentNode)
         }
       }
       else if (el_node.nodeName.toLowerCase() == 'ul') el_node.style.display = 'none';
       this.start(el_node);
     }
   }
 
   if (document.getElementById && document.childNodes)
   {
     if (document.images)
     {
       new Image().src = 'graphics/folder_open.png';
       new Image().src = 'graphics/file.png';
     }
     this.start(document.getElementById(this.id));
   }

 }