php - ddslick plugin: get value in wordpress -

i have choice menu in wordpress plug-in ddslick . want pass id of selected option , send form database , value not saved although appears within html . when put manual maintained.

   <script type='text/javascript' src='http://g-page.co.il/wp-content/themes/g-page/js/jquery.ddslick.min.js'></script>   <div id="mydropdown">      <select id="demo-htmlselect">             <?php               $thumbnails = get_posts('numberposts=5');   foreach ($thumbnails $thumbnail) {        $url = wp_get_attachment_url( get_post_thumbnail_id($thumbnail->id) );               ?>             <option value="<?php echo $thumbnail->id;?>" data-imagesrc="<?php echo $url; ?>"             data-description="<?php echo $thumbnail->post_title;?>"><?php echo $thumbnail->post_title;?></option>         <?php } ?>      </select>      </div>   <?php  ?>     <div class="wrap">         <form method="post" action="options.php">             <?php wp_nonce_field('update-options') ?>                  <input type="text" name="main_art_id" size="45" value="<?php echo get_option('main_art_id'); ?>" />             </p>             <p><input type="submit" name="submit" value="store options" /></p>             <input type="hidden" name="action" value="update" />             <input type="hidden" name="page_options" value="ain_art_id" />         </form>     </div>               <script type="text/javascript">      jquery(document).ready(function($) {            $('#mydropdown').ddslick({             onselected: function(selecteddata){                    var cor_val = selecteddata['selecteddata']['value'];                  $("input[name=main_art_id]").val(cor_val);               }            });  });    </script>   <?php    }