function changeCruise(year) {
 if (self.parent.frames.length != 0)
   self.parent.location='/cruise_books/'+year+'/intro/';
}

function changeReunion(year) {
 if (self.parent.frames.length != 0)
   self.parent.location='/Reunion/'+year+'/';
}

function changeOldReunion(year) {
 if (self.parent.frames.length != 0)
   self.parent.location='/photo_album/'+year+'_reunion/default.htm';
}