/* Show-hide for all DIVs initially closed */

  var element_id = "";
  var state = 0;

  function show_hide ( id )
  {
	if ( state == 0 )
	{
		state = 1;
		element_id = id;
		document.getElementById( id ).style.display = 'block';
	}
	else
	{
		if ( id == element_id )
		{
			state = 0;
			document.getElementById( id ).style.display = 'none';
		}
		else
		{
		
			state = 1;
			document.getElementById( element_id ).style.display = 'none';
			document.getElementById( id ).style.display = 'block';
			element_id = id;
		}
	}
  }