var menuBtnOn = new Array;
var menuBtnOff = new Array;
var busy = new Array(0, 0, 0, 0, 0, 0);

function Preload()
{
	for (var i = 1; i <= 5; i++) {
		menuBtnOn[i] = new Image;
		menuBtnOn[i].src = 'img/menu/menu' + i + 'on.gif';
		menuBtnOff[i] = new Image;
		menuBtnOff[i].src = 'img/menu/menu' + i + 'off.gif';
	}
}

function menuOn(num)
{
	document.images['menu' + num].src = menuBtnOn[num].src;
	eval("document.all.menuDiv" + num + ".style.visibility='visible'");
}

function menuOff(num)
{
	if (busy[num] == 0) {
		document.images['menu' + num].src = menuBtnOff[num].src;
		eval("document.all.menuDiv" + num + ".style.visibility='hidden'");
	}
}

Preload();