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

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

function showLyrics(layername, total){
	for(i=1; i<=total; i++){
		document.getElementById('lyrics'+i).style.display = 'none';	
	}
	document.getElementById('lyricsContainer').style.display = 'block';
	document.getElementById(layername).style.display = 'block';
}

function hideLyrics(total){
	for(i=1; i<=total; i++){
		document.getElementById('lyrics'+i).style.display = 'none';	
	}
	document.getElementById('lyricsContainer').style.display = 'none';
}