- $('#display_name').append('<option id="display_firstname" value="' + first + '">' + first + '</option>' +
- '<option id="display_lastname" value="' + last + '">' + last + '</option>' +
- '<option id="display_firstlast" value="' + first + ' ' + last + '">' + first + ' ' + last + '</option>' +
- '<option id="display_lastfirst" value="' + last + ' ' + first + '">' + last + ' ' + first + '</option>');
- } else if ( first && !last ) {
- $('#display_name').append('<option id="display_firstname" value="' + first + '">' + first + '</option>');
- } else if ( !first && last ) {
- $('#display_name').append('<option id="display_lastname" value="' + last + '">' + last + '</option>');
+ if ( ! select.children('option[value=' + first + ' ' + last + ']').length )
+ select.append('<option id="display_firstlast" value="' + first + ' ' + last + '">' + first + ' ' + last + '</option>');
+ if ( ! select.children('option[value=' + last + ' ' + first + ']').length )
+ select.append('<option id="display_lastfirst" value="' + last + ' ' + first + '">' + last + ' ' + first + '</option>');