@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document domain("eow.alc.co.jp") {

#AreaHeaderLeft,
#AreaHeaderCenter,
#AreaHeaderRight,
#AreaGnaviLeft,
#AreaGnaviRight,
#AreaUpperRight,
#AreaLowerRight

  { display: none !important; }
}