php - Enable dropdown box based on other dropdown selection -


i have 2 dropdown boxes, 1 role , 1 partner type, if role equal partner want enable dropdown partner type. using codeigniter , jquery. here code not working properly, when change 1st dropdown, 2nd dropdown keep disabled. maybe wrong in code.

<div class="form-group">     <label>role</label>     <?php         $role_id = array(             'value'     => set_value('role_id'),         );         $role_options = array(             '9'          => 'super-admin',             '10'         => 'admin',             '11'         => 'partner',             '12'         => 'reporting',         );         $role_ids_name = array(             'name'      => 'role_id',             'id'        => 'role_id',             'class'     => 'form-control',         );     echo form_dropdown('role_id', $role_options, set_value('role_id', $role_id), array('id' => 'role_id', 'class' => 'form-control','onchange'=>'enabletype($(this));')); ?> </div> <script type="text/javascript"> function enabletype(obj) {     var selectedtext = obj.children(':selected').text();     if(selectedtext == 'partner');     {         //enable partner type         $('type_id').attr('disabled',false);      }     else     {         //disable partner type         $('type_id').attr('disabled',true);       } } </script>  <div class="form-group">     <label>partner type</label>     <?php         $type_id = array(             'value'     => set_value('type_id'),          );         $type_options = array(             '3'         => 'photographer',             '4'         => 'house sitter',             '6'         => 'banker',             '7'         => 'lawyer',             '8'         => 'insurance agent',         );          $type_id_name = array(             'name'      => 'type_id',             'id'        => 'type_id',             'class'     => 'form-control',             'disabled'  => 'disabled',          );     echo form_dropdown('type_id', $type_options, set_value('type_id', $type_id), $type_id_name); ?> </div>

i solve problem , here code: 

<script>       $("#role_id").on("change", function(){         var selected = $(this).val();         if(selected == 11)          {             $('#type_id').attr('disabled',false);          }         else         {             $('#type_id').attr('disabled',true);         }        }) </script>

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