function toggle(object) {
  if (document.getElementById) {
    if (document.getElementById(object).style.visibility == 'visible')
      document.getElementById(object).style.visibility = 'hidden';
    else
      document.getElementById(object).style.visibility = 'visible';
  }

  else if (document.layers && document.layers[object] != null) {
    if (document.layers[object].visibility == 'visible' ||
        document.layers[object].visibility == 'show' )
      document.layers[object].visibility = 'hidden';
    else
      document.layers[object].visibility = 'visible';
  }

  else if (document.all) {
    if (document.all[object].style.visibility == 'visible')
      document.all[object].style.visibility = 'hidden';
    else
      document.all[object].style.visibility = 'visible';
  }
  return false;
}

function hide(object) {
  if (document.getElementById) {
      document.getElementById(object).style.visibility = 'hidden';
  }
  else if (document.layers && document.layers[object] != null) {
      document.layers[object].visibility = 'hidden';
  }
  else if (document.all) {
      document.all[object].style.visibility = 'hidden';
  }
  return false;
}


function show(object) {
  if (document.getElementById) {
      document.getElementById(object).style.visibility = 'visible';
  }
  else if (document.layers && document.layers[object] != null) {
      document.layers[object].visibility = 'visible';
  }
  else if (document.all) {
      document.all[object].style.visibility = 'visible';
  }
  return false;
}