function showItem(item)
      {
        var elem = document.getElementById(item)  

        if (elem != null)
        {
          elem.style.display = "block";
        }
      }
      
      function hideItem(item)
      {
        var elem = document.getElementById(item)
        
        if (elem != null)
        {
          elem.style.display = "none";
        }
      }
      
      function expand(item)
      {
        var elem = document.getElementById(item);
        var link = document.getElementById(item + "Lnk");
        
        if (elem != null)
        {
          if (elem.style.display == "none")
          {
            link.innerHTML = link.innerHTML.replace(/\+/, "-");
            elem.style.display = "block";
          }
          else
          {
            //alert(link.innerHTML);
            link.innerHTML = link.innerHTML.replace(/-/, "+");
            elem.style.display = "none";
          }
        }
      }