function toggleLayer( whichLayer, thatLayer )
{
  var elem, vis, elem2, vis2;
  if( document.getElementById ) // this is the way the standards work
    elem = document.getElementById( whichLayer );

	else if( document.all ) // this is the way old msie versions work
      elem = document.all[whichLayer];
 	  
  else if( document.layers ) // this is the way nn4 works
    elem = document.layers[whichLayer];
  vis = elem.style;
  // if the style.display value is blank we try to figure it out here
  if(vis.display=='undefined'&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
    vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
    vis.display = (vis.display=='undefined'||vis.display=='block')?'none':'block';

// hide other one (thatLayer)

  if( document.getElementById ) // this is the way the standards work
    elem2 = document.getElementById( thatLayer );

	else if( document.all ) // this is the way old msie versions work
       elem2 = document.all[thatLayer];

	  else if( document.layers ) // this is the way nn4 works
    elem2 = document.layers[thatLayer];
	vis2 = elem2.style;
  // if the style.display value is blank we try to figure it out here

  if(vis2.display=='undefined'&&elem2.offsetWidth!=undefined&&elem2.offsetHeight!=undefined)
    vis2.display = (elem2.offsetWidth==0&&elem2.offsetHeight==0)?'block':'none';
	vis2.display = (vis2.display!='undefined'||vis2.display!='block')?'none':'block';

	
}


// the function below(closeLayer) is not using now

function closeLayer( whichLayer, thatLayer )
{
  var elem, vis, elem2, vis2;
  if( document.getElementById ) // this is the way the standards work
    elem = document.getElementById( whichLayer );

	else if( document.all ) // this is the way old msie versions work
      elem = document.all[whichLayer];
 	  
  else if( document.layers ) // this is the way nn4 works
    elem = document.layers[whichLayer];
  vis = elem.style;
  // if the style.display value is blank we try to figure it out here
  if(vis.display=='undefined'&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
    vis.display = (elem.offsetWidth==0&&elem.offsetHeight==0)?'block':'none';
    vis.display = (vis.display!='undefined'||vis.display!='block')?'none':'block';

// hide the other one 

  if( document.getElementById ) // this is the way the standards work
    elem2 = document.getElementById( thatLayer );

	else if( document.all ) // this is the way old msie versions work
       elem2 = document.all[thatLayer];

	  else if( document.layers ) // this is the way nn4 works
    elem2 = document.layers[thatLayer];
	vis2 = elem2.style;
  // if the style.display value is blank we try to figure it out here

  if(vis2.display=='undefined'&&elem2.offsetWidth!=undefined&&elem2.offsetHeight!=undefined)
    vis2.display = (elem2.offsetWidth==0&&elem2.offsetHeight==0)?'block':'none';
	vis2.display = (vis2.display!='undefined'||vis2.display!='block')?'none':'block';
}