function ExpandLI (obj)
{
  var id = obj.id.substr (2)
  var li = document.getElementById ("li" + id)
  var ul = document.getElementById ("ul" + id)

  if (ul.style.display == "")
  {
    obj.src = "../images/folder.gif"
    obj.alt = "Розгорнути"
    ul.style.display = "none"
  }
  else
  {
    obj.src = "../images/folderop.gif"
    obj.alt = "Згорнути"
    ul.style.display = ""
  }
}