function toggleLayer( whichLayer, whichLink ){  
	document.getElementById('rowid1').style.display = 'none';
	document.getElementById('rowid3').style.display = 'none';
	document.getElementById('rowid4').style.display = 'none';
	document.getElementById('rowid5').style.display = 'none';
	document.getElementById('rowid6').style.display = 'none';
	document.getElementById('rowid7').style.display = 'none';
	document.getElementById('rowid8').style.display = 'none';
	document.getElementById('rowid9').style.display = 'none';
	document.getElementById('rowid10').style.display = 'none';
	document.getElementById('rowid11').style.display = 'none';
	document.getElementById('rowid12').style.display = 'none';
	document.getElementById('rowid13').style.display = 'none';
	document.getElementById('rowid14').style.display = 'none';
	document.getElementById('rowid15').style.display = 'none';
	document.getElementById('rowid16').style.display = 'none';
	document.getElementById('rowid17').style.display = 'none';
	document.getElementById('rowid18').style.display = 'none';
	document.getElementById('linkrow1').className = 'linktitlea';
	document.getElementById('linkrow3').className = 'linktitlea';
	document.getElementById('linkrow4').className = 'linktitlea';
	document.getElementById('linkrow5').className = 'linktitlea';
	document.getElementById('linkrow6').className = 'linktitlea';
	document.getElementById('linkrow7').className = 'linktitlea';
	document.getElementById('linkrow8').className = 'linktitlea';
	document.getElementById('linkrow9').className = 'linktitlea';
	document.getElementById('linkrow10').className = 'linktitlea';
	document.getElementById('linkrow11').className = 'linktitlea';
	document.getElementById('linkrow12').className = 'linktitlea';
	document.getElementById('linkrow13').className = 'linktitlea';
	document.getElementById('linkrow14').className = 'linktitlea';
	document.getElementById('linkrow15').className = 'linktitlea';
	document.getElementById('linkrow16').className = 'linktitlea';
	document.getElementById('linkrow17').className = 'linktitlea';
	document.getElementById('linkrow18').className = 'linktitlea';
	var elem, vis;  if( document.getElementById ) 
   elem = document.getElementById( whichLayer );  
   else if( document.all )     
   elem = document.all[whichLayer]; else if( document.layers ) 
   elem = document.layers[whichLayer];
   vis = elem.style;
   if(vis.display == '' && elem.offsetWidth!=undefined && elem.offsetHeight!=undefined) vis.display = (elem.offsetWidth!=0 && elem.offsetHeight!=0)?'block':'none';  
   vis.display = (vis.display == '' || vis.display=='block')?'none':'block';

	if (document.getElementById(whichLayer).style.display == 'block') {
		document.getElementById(whichLink).className = 'linktitleb';
	} 
	
}