anchor.diff:  
   
   
  -         
  +       
  +
  +
  +
  +<script type="text/javascript">
  +$(document).on('change', '#combo', function(){
  +    var shouldEnable = $(this).val() !== 'Empleado';
  +    $('#textbox').prop('disabled', shouldEnable);
  +});
  +
  +</script>
   
   
   
  
positive.code: 
                      <div class="col-md-4">
                          <label>Arl:</label> 
                          <%= f.collection_select :arl_id, Arl.all, :id, :nombre, {prompt: "Selecciones una Arl"}, {class: "form-control arl habilitado"} %>
                      </div>
  
  
  