//----------レイヤー表示非表示（メニュー）
var Lay2;
var flag2;
var flag3;
var timeout_ID;
function ShowHide(Lay,flag,t_out) {
	v = (!flag) ? "hidden" : "visible"
	if ( document.all ) document.all( Lay ).style.visibility = v
	else if ( document.layers ) document.layers[Lay].visibility = v
	else if ( document.getElementById )
	document.getElementById( Lay ).style.visibility = v
	if (Lay2){
		v = "hidden";
		if (Lay2==Lay && !flag3 && !t_out){
			v = "visible";
			flag3 = 1;
		}
		else{flag3=0;}
		if ( document.all ) document.all( Lay2 ).style.visibility = v
		else if ( document.layers ) document.layers[Lay2].visibility = v
		else if ( document.getElementById )
		document.getElementById( Lay2 ).style.visibility = v
	}
	else{flag3=1;}
	if (t_out){Lay2=''; flag2='';}
	else{
		Lay2 = Lay;
		flag2 = flag;
	}
	if (timeout_ID){clearTimeout(timeout_ID);}
	if(flag){timeout_ID = window.setTimeout("ShowHide(Lay2,0,1)",20000);}//タイムアウトでメニュークローズ(ｎ/1000秒)
}