function reveal(menu, parent) {
  if (document.layers) {
    daMenu = document.layers[menu];
  }
  else {
    daMenu = document.getElementById(menu).style;
  }

    daMenu.visibility = "visible";
//  lastMenu = daMenu;
}

function hide(menu, parent) {
  if (document.layers) {
    daMenu = document.layers[menu];
  }
  else {
    daMenu = document.getElementById(menu).style;
  }
  
  daMenu.visibility = "hidden";
}

var lastItem = '';