function showa(ano_id){
	var ano=document.getElementById(ano_id);
	if(ano.style.display==""){
		ano.style.display="none";
	}else{
		ano.style.display="";
	}
	//if(ano_id.substring(0,1)=="W"){
		
	//}
}
var allshow =false;
function showall(aum){
	if(!allshow){
		for(var i=1;i<=aum;i++){
			var ano=document.getElementById("W"+i);
			ano.style.display="";
			document.getElementById("subBut").value="全ての質問を非表示";
		}
		allshow=true;
	}else{
		for(var i=1;i<=aum;i++){
			var ano=document.getElementById("W"+i);
			ano.style.display="none";
			document.getElementById("subBut").value="全ての質問を表示";
		}
		allshow=false;
	}
}

function switchbox(i)
{
 selectbox(i);
}
function selectbox(i)
{
 switch(i)
 {
 case 1:
 document.getElementById("layer1").style.display="block";
 document.getElementById("layer2").style.display="none";
 break;
 case 2:
 document.getElementById("layer1").style.display="none";
 document.getElementById("layer2").style.display="block";
 break;
 }
}