$(function(){
	var dest_clone = $('#bb_dest').clone();
	var home_clone = $('#bb_hb').clone();

	$('#bb_orig').change(function(){
		var v = $(this).val();
		var oldval = $('#bb_dest').val();
		$('#bb_dest').html(dest_clone.html());
		$('#bb_dest option[value='+v+']').remove();
		$('#bb_dest').val(oldval);
	}).change();

	$('#bb_ob').change(function(){
		var idx = $('#bb_ob').get(0).selectedIndex;
		var oldval = $('#bb_hb').val();
		$('#bb_hb').html(home_clone.html());
		$('#bb_hb option:lt('+idx+')').remove();
		$('#bb_hb').val(oldval);
	}).change();
});