function _show(_iTag)
{
  var _sList=document.getElementById(_iTag);

  if (_sList==null) {return;};

  with (_sList.style)
  {
    display="block";
    visibility="visible";
    zIndex="999";
  };
  return;
}

function _hide(_iTag)
{
  var _sList=document.getElementById(_iTag);

  if (_sList==null) {return;};

  with (_sList.style)
  {
    display="none";
    visibility="hidden";
    zIndex="0";
  };
  return;
}

function _hideAll(_iClass)
{
  var _sList=document.getElementsByClassName(_iClass);

  if (_sList==null) {return;};

  for (_s in _sList)
  {
    with (_s.style)
    {
      display="none";
      visibility="hidden";
      zIndex="0";
    };
  };

  return;
};


//..... ..... ..... .....