function Page(page,lang)
{
  switch(page)
  {
    case 'aktualnosci':
      frames['tresc'].location.href = 'include/aktualnosci.php?setlang='+lang;
      break;
    case 'od_szefa':
      frames['tresc'].location.href = 'include/od_szefa.php?setlang='+lang;
      break;
    case 'program':
      frames['tresc'].location.href = 'include/program.php?setlang='+lang;
      break;
    case 'katalog_filmow':
      frames['tresc'].location.href = 'include/katalog_filmow.php?setlang='+lang;
      break;
    case 'koncerty_i_diaporamy':
      frames['tresc'].location.href = 'include/koncerty_i_diaporamy.php?setlang='+lang;
      break;
    case 'jak_zrobic_film':
      frames['tresc'].location.href = 'include/jak_zrobic_film.php?setlang='+lang;
      break;
    case 'wazne_linki':
      frames['tresc'].location.href = 'include/wazne_linki.php?setlang='+lang;
      break;
    case 'kronika':
      frames['tresc'].location.href = 'include/kronika.php?setlang='+lang;
      break;
    case 'kronika_zdjeciowa':
      frames['tresc'].location.href = 'include/kronika_zdjeciowa.php?setlang='+lang;
      break;
    case 'kronika_filmowa':
      frames['tresc'].location.href = 'include/kronika_filmowa.php?setlang='+lang;
      break;
    case 'czeski_tydzien':
      frames['tresc'].location.href = 'include/czeski_tydzien.php?setlang='+lang;
      break;
    case 'wspomnienie':
      frames['tresc'].location.href = 'include/wspomnienie.php?setlang='+lang;
      break;
    case 'kontakt':
      frames['tresc'].location.href = 'include/kontakt.php?setlang='+lang;
      break;
    case 'mediainfo':
      frames['tresc'].location.href = 'include/mediainfo.php?setlang='+lang;
      break;      
    case 'szukaj':
      szukaj = document.formularz.szukana_fraza.value;
      frames['tresc'].location.href = 'include/szukaj.php?setlang='+lang+'&szukaj='+szukaj;
      break;
  }
}