gistfile2.txt

Mootools_hash_2_jQuery

var subcats = cats[foo_barcat_id].subcats;
var subcatHash = $.extend({}, subcats);

$('tr[id^=all_fields_]').each(function() {
  if($(this).id == 'all_fields_' + foo_barcat_id) {
    $(this).hide();
  } else {
    $(this).show();
  }
});

if(foo_barcat_id == 0 || subcatHash.isEmptyObject()) {
  $('#foo_barsubcat_id').options.length = 1;
  $('#foo_barsubcat_id').hide();
}