function toggle_menu(lm_id)
{
  var e = _ge('menu_'+lm_id);

  if (e)
  {
    e.style.display = e.style.display != 'block' ? 'block' : 'none';
  }
}

function gray_bg_show()
{
  var bg_e = _ge('gray-bg');

  if (bg_e)
  {
    var screen_h = get_screen_dimensions('h');

    var h = Math.max(
      document.documentElement ? document.documentElement.clientHeight : 0,
      document.body.clientHeight,
      document.body.scrollHeight,
      document.body.offsetHeight,
      window.innerHeight || 0,
      screen_h
    );

    bg_e.style.height = h+'px';
    di_set_opacity(bg_e, 60);
    bg_e.style.display = 'block';
  }
}