# Success in Observe field

**URL:** <https://www.ruby-forum.com/t/success-in-observe-field/178362>\
**Category:** Rails\
**Created:** [November 3, 2009, 3:11pm UTC](https://www.ruby-forum.com/t/success-in-observe-field/178362 "2009-11-03T15:11:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![srinathbtech](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/7bcc69/32.png) [@srinathbtech](https://www.ruby-forum.com/u/srinathbtech)\
**Post date:** [November 3, 2009, 3:11pm UTC](https://www.ruby-forum.com/t/success-in-observe-field/178362/1 "2009-11-03T15:11:15Z")

</div>

Hi,  
How to call javascript function using success in observe field .

```
  <%= observe_field (ha.id,
      :frequency => 0.5,
      :update => "article_list_#{ha.id}",
      :url => {:action => :auto_complete_for_article_title, :id =>

```

ha.id},  
:with =\> “‘article=’+ escape(value)”,  
:success =\> “close\_title(#{ha.id})”)%\>

In javascript :  
function close\_title(div\_id){  
document.getElementById(‘article\_list\_’+div\_id).style.display=“block”;  
}

I want to call close\_title function for every success ie. status 200 OK  
.  
let me know if any there are any alternatives if wrong

thanks,  
sri…