var currentSubMenu = "01_toggle";
var currentMenuItem = "";
var menuItemNormal = "";

function setCurrentMenuItem(item, normal) {
  if(currentMenuItem != MM_findObj(item)) {
    currentMenuItem.src = menuItemNormal;
    currentMenuItem = MM_findObj(item);
    menuItemNormal = normal;
  }
}

function toggleList(id) {
  list = document.getElementById(id);
  if (list.style.display == "inline") {
    list.style.display = "none";
  } else {
    if(currentSubMenu != "") {
      prev = document.getElementById(currentSubMenu);
      prev.style.display = "none";
    }
    list.style.display = "inline";
  }
  currentSubMenu = id;
}