function showsubmenu(id){
	submenu=document.getElementById('s'+id);
	sublen = document.getElementById('sublinks').getElementsByTagName('ul').length;
	for(i=1;i<=sublen;i++){
		if(i==id){
			submenu.style.display="block";
		} else{
			document.getElementById('s'+i).style.display="none";
		}
	}
}

function biro(anc,id){
  var a = document.getElementById(id).style.display;
  if(a=="none"){
    document.getElementById(id).style.display="inline";
    anc.innerHTML="続きを閉じる";
  }else{
    document.getElementById(id).style.display="none";
    anc.innerHTML="続きを読む";
  }
  return 0;
}