var currentLayer = new Array(5);
for(i=1;i<=5;i++){
	currentLayer[i] = '';
}

function showLayer (l,f){
	// l : 表示するレイヤ
	// f : 現在の階層　2〜5
	
	for(i=f;i<=5;i++){
		if(currentLayer[i] != ''){
			hiddenLayer(currentLayer[i]);
		}
	}
	
	docObj = getObj(l);
	docObj.style.visibility='visible';
	currentLayer[f] = l;
	docObj = getObj('Layer0');
	docObj.style.visibility='visible';
}
function hiddenLayer(i){
	docObj = getObj(i);
	docObj.style.visibility='hidden';	
	docObj = getObj('Layer0');
	docObj.style.visibility='hidden';
}
function hiddenAllLayer(){
	for(i=1;i<=5;i++){
		if(currentLayer[i] != ''){
			hiddenLayer(currentLayer[i]);
		}
	}
}

function changeStyleOn(obj){
	obj.textDecoration = 'none';
	obj.backgroundColor = '#2C5790';
	obj.color = '#FFFFFF';
}
function changeStyleOff(obj){
	obj.textDecoration = 'underline';
	obj.backgroundColor = '#D2E5ED';
	obj.color = '#114892';
}
function changeStyleOffg(obj){
	obj.textDecoration = 'underline';
	obj.backgroundColor = '#CBEAC5';
	obj.color = '#114892';
}