if (document.images) {
	var menuoff= new Array(5);
	for (var i = 1; i <= 4; i++) {
		menuoff[i] = new Image(160, 60);
		menuoff[i].src = "images/menu" + i + "_off.gif";
	}
	var menuon= new Array(5);	
	for (var i = 1; i <= 4; i++) {
		menuon[i] = new Image(160,60);
		menuon[i].src = "images/menu" + i + "_on.gif";
	}
}
function chgmenu(n,change) {
	if (document.images) {
		if (change == "on") {
			document.images['menu'+n].src = "images/menu" + n + "_on.gif";
		} else if (change == "off") {
			document.images['menu'+n].src= "images/menu" + n + "_off.gif";
		}
	}
}