function menu_display(mhead, mitem)
{
  // Display submenu
  var mEl = document.getElementById(mitem);
  if(!mEl) { return; }

  mEl.style.display = "block";

  // Menuhead stay white
  var mEl = document.getElementById(mhead);
  mEl.style.color = "white";
}

function menu_hide(mhead, mitem)
{
  // Hide submenu
  var mEl = document.getElementById(mitem);
  if(!mEl) { return; }
  mEl.style.display = "none";
  mEl.style.zIndex = 1;
  
  // Menuhead back to original color
  var mEl = document.getElementById(mhead);
  mEl.style.color = "rgb(206, 230, 193)";
  
}