function show(id)
{
	new Effect.BlindDown("subnavi_"+id, { duration:0.3 });
	document.getElementById("plus_"+id).style.display = "none";
	document.getElementById("minus_"+id).style.display = "block";
}
function hide(id)
{
	new Effect.BlindUp("subnavi_"+id, { duration:0.3 });
	document.getElementById("plus_"+id).style.display = "block";
	document.getElementById("minus_"+id).style.display = "none";
}