// JavaScript Document
var onoff = 0;
function MenuOn(x){
	onoff = 1;
	for (i = 1; i < 13; i++) {
		document.getElementById("submenu"+i).style.visibility = "hidden";
	}
	obj=document.getElementById("submenu"+x).style.visibility = "visible";
	}
function kilmenu(x){
	if (onoff == 0) {
		obj=document.getElementById("submenu"+x).style.visibility="hidden";
	}
	}
function MenuOff(x){
	onoff = 0;
	t = x;
	setTimeout("kilmenu(t)",1000);
	}
function newWindow() {
		networkWindow = window.open('http://www.iij.ad.jp/network/backbone/index.html', 'networkWin', 'width=810,height=600,scrollbars=yes,resizable=yes')
	}