function toggleLayer(layerid){
	showLayer('togglelayer'+layerid);
	toggleButtonOn('togglebutton'+layerid);
	for(var i=0; i<document.getElementsByTagName('div').length; i++){
		if(document.getElementsByTagName('div')[i].id.substr(0,11) == 'togglelayer' && document.getElementsByTagName('div')[i].id != 'togglelayer'+layerid){
			hideLayer(document.getElementsByTagName('div')[i].id);
		}
	}
	for(var i=0; i<document.getElementsByTagName('a').length; i++){
		if(document.getElementsByTagName('a')[i].id.substr(0,12) == 'togglebutton' && document.getElementsByTagName('a')[i].id != 'togglebutton'+layerid){
			toggleButtonOff(document.getElementsByTagName('a')[i].id);
		}
	}
}

function toggleButtonOn(buttonid){
	var targetButton = document.getElementById(buttonid);
	targetButton.className = "contentdisplaysel";
}

function toggleButtonOff(buttonid){
	var targetButton = document.getElementById(buttonid);
	targetButton.className = "contentdisplay";
}
			
function showLayer(layerid){
	var targetLayer = document.getElementById(layerid);
	targetLayer.style.display = "inline";
}
			
function hideLayer(layerid){
	var targetLayer = document.getElementById(layerid);
	targetLayer.style.display = "none";
}