function menu(obj) {
	var ua = navigator.userAgent;

	if (ua.indexOf("Gecko") != -1) return false;
	var nodeNum = (document.all && ua.indexOf("Win") != -1) ? 2 : 3 ;
	var target = obj.childNodes[nodeNum];

	target.style.display = (target.style.display == "block") ? "none" : "block";
}