function mmenu(e) {
var n = document.getElementById(e).childNodes;
	for (var i = 0; i < n.length; i++) {
	// do something with each child as children[i]
//if(n[i].tagName == 'A') {"collapse" == n[i].style.visibility ? n[i].style.visibility = "visible" : n[i].style.visibility = "collapse"}
if(n[i].tagName == 'A') {
		if(n[i].style.display == 'block') {n[i].style.display = "none";} else {n[i].style.display = "block";}
}
	}
}