var menu_count = 10;
function toggle_menu(id) {
	var obj = document.getElementById(id);
	if ( obj == null ) return;
	for(i=1; i<=menu_count;i++) {
		if ( id != "menu"+i ) {
			var o = document.getElementById("menu"+i);
			if ( o != null && o.style.display == "block" ) {
				toggle_menu2("menu"+i);
			}
		}
	}
	obj.style.display = (obj.style.display == "none") ? "block" : "none";
	set_cookie(id, obj.style.display,"","/");
}

function toggle_menu2(id) {
	var obj = document.getElementById(id);
	if ( obj == null ) return;
	obj.style.display = (obj.style.display == "none") ? "block" : "none";
	set_cookie(id, obj.style.display,"","/");
}

function set_cookie(name, value, expires, path, domain, secure) {
  var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}

function get_cookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}

function restore_menu_state() {
	for(var i=1; i<=menu_count; i++) {
		if ( get_cookie("menu"+i) != null ) {
			document.getElementById("menu"+i).style.display = get_cookie("menu"+i);
		}
	}
}

function show_menu(id) { //fix index not use sub_menu
	var obj = document.getElementById(id);
	if ( obj == null ) return;
	obj.style.display = (obj.style.display == "none") ? "block" : "block";
	set_cookie(id, obj.style.display,"","/");
}