function menu(id,active) {
  if(active=='on') {
    document.getElementById('menu'+id).className='active';
  } else if(active=='off') {
    document.getElementById('menu'+id).className='menu-item';
  }
}

function showHideDiv(id) {
  var div = document.getElementById(id);
  var displaymode = div.style.display;
  if(displaymode=='none') {
    div.style.display='block';
  } else {
    div.style.display='none';
  }
}