//---------------------------------------------------------------
//
//  Simple Javascript script to reveal/hide selected menu items
//
//---------------------------------------------------------------

// Set the visible and hidden variables to the appropriate
// strings for NN and IE.

var lastItemSelected = null;
var visible;
var hidden;

function initVisibleHidden()
// Initializes the visible and hidden designators.
{
   if (document.layers)     // Document has NN DOM
   { 
      visible = 'show';
      hidden = 'hide';
   } 
   else if (document.all)   // Document has IE DOM
   {
     visible = 'visible';
     hidden = 'hidden';
   }
}

function select (Item)
// Reveals/hides the specified Item.
{
  if (document.layers)
    ItemSelected = document.layers[Item];
  else if (document.all) 
    ItemSelected = document.all(Item).style;

  if ( lastItemSelected == null )
     initVisibleHidden();
  else if ( lastItemSelected != ItemSelected )
     lastItemSelected.visibility = hidden;

  if ( ItemSelected != null )
  {
     if (ItemSelected.visibility == visible) 
        ItemSelected.visibility = hidden;
     else
        ItemSelected.visibility = visible;
     lastItemSelected = ItemSelected;
  }
}