write_styles = "<style type='text/css'> #menu DIV UL.off {display: none;} </style>";
document.write(write_styles);

// funkce pro rozbaleni a sbaleni podmenu
function submenu(n)
{
  var list = "l"+n;
  var image = "i"+n;

  if (document.getElementById(list).className != "off")
  {
    document.getElementById(list).className = "off";
    document.getElementById(image).className = "off";
  }
  else
  {
    document.getElementById(list).className = "on";
    document.getElementById(image).className = "on";
  }
}