function hyoji(id){
	obj=(document.all)?document.all(id):((document.getElementById)?document.getElementById(id):null);
	if(obj)obj.style.visibility="visible";
}
function syokyo(id){
	obj=(document.all)?document.all(id):((document.getElementById)?document.getElementById(id):null);
	if(obj)obj.style.visibility="hidden";
}