function showLayer(layerName)  {  
	document.getElementById(layerName).style.display='block'; 
}

function hideLayer(layerName)  {  
	document.getElementById(layerName).style.display='none';  
}

function ToggleSection(obj) {
	var el = document.getElementById(obj);
	el.style.display = (el.style.display != 'none' ? 'none' : '' );
}