var Booking = {
  validDestinations: {'BOS':['LAS','LAX','SFO','SAN','SEA'],
                      'LAS':['BOS','JFK','SFO','SEA','IAD'],
                      'LAX': ['BOS','JFK','SFO','SEA','IAD'],
                      'JFK': ['LAS','SAN','SFO','SEA'],
                      'SAN': ['BOS','JFK','SFO','SEA','IAD'],
                      'SFO': ['BOS','LAS','LAX','JFK','SAN','SEA','IAD'],
                      'SEA': ['BOS','LAS','LAX','JFK','SAN','SEA','IAD'],
                      'IAD': ['LAS','LAX','SAN','SFO','SEA']},
  updateDestination:function(origin) {  
    $j(".to li").hide();
    $j(".to li").each(function(){
      for (var i=0; i < Booking.validDestinations[origin].length; i++){
        if ($j(this).children().children(":input")[0].value == Booking.validDestinations[origin][i]){
          $j(this).show();
        }
      }
    });
  }
};