Copying options and optiongroups with jQuery -

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i have found great jquery snippet allows copying of option 1 selector , back.

i modify add option groups , when options moved 1 side another, have option group removed empty group , add full group in new selector.
can accomplished using jquery?

html:

<select multiple id="select1" class="w100p">                     <optgroup label="group 1">       <option value="1">option 1a</option>       <option value="2">option 1b</option>     </optgroup>     <optgroup label="group 2">       <option value="3">option 2a</option>       <option value="4">option 2b</option>     </optgroup> </select>  <a href="#" id="add">add >></a> <br> <a href="#" id="remove"><< remove</a>  <select multiple id="select2" class="w100p"></select>

javascript:

$('#add').click(function() {     return !$('#select1 option:selected').remove().appendto('#select2'); }); $('#remove').click(function() {     return !$('#select2 option:selected').remove().appendto('#select1'); });

demo

although not perfect, should started:

var $select1 = $('#select1');     $select2 = $('#select2');  $('option').each(function(){     $(this).data('optgroup', $(this).parent().attr('label')); });  $('#add').click(function() {     var $el = $('#select1 option:selected'),         groupname = $el.data('optgroup'),         $parent = $el.parent(),         $optgroup = $select2.find('optgroup[label="' + groupname + '"]');      if ( ! $el.length ) return false;      if ( ! $optgroup.length ) $optgroup = $('<optgroup label="' + $el.data('optgroup') + '" />').appendto($select2);      $el.appendto( $optgroup );      if ( ! $parent.children().length ) $parent.remove();      return false; }); $('#remove').click(function() {     var $el = $('#select2 option:selected'),         groupname = $el.data('optgroup'),         $parent = $el.parent(),         $optgroup = $select1.find('optgroup[label="' + groupname + '"]');      if ( ! $el.length ) return false;      if ( ! $optgroup.length ) $optgroup = $('<optgroup label="' + $el.data('optgroup') + '" />').appendto($select1);      $el.appendto( $optgroup );      if ( ! $parent.children().length ) $parent.remove();      return false; });

like said, needs additional work (like consolidating 2 functions; they're doing same thing), should started.

finally, here's fiddle: http://jsfiddle.net/m97zr/3/


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