function menulOver(Nr)
{
  var TD = document.getElementById("menuL"+Nr)
  var TDdol = document.getElementById("menuL"+(Nr+1))

  TD.style.backgroundImage = "url('images/menul_wyb.jpg')";
  TDdol.style.backgroundImage = "url('images/menul_wyb2.gif')";
}

function menulOut(Nr)
{
  var TD = document.getElementById("menuL"+Nr)
  var TDdol = document.getElementById("menuL"+(Nr+1))

  TD.style.backgroundImage = "url('images/menul_linia.gif')";
  TDdol.style.backgroundImage = "url('images/menul_linia.gif')";
}