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Possible Duplicate:
Which tools and technologies build the Stack Exchange Network?

When not logged in Stack Overflow shows this message

"Was this post useful to you?"

I was wondering if anybody could tell me what plugin does Stack Overflow use to achieve this.

enter image description here

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marked as duplicate by Bart, Yannis, ChrisF, Martijn Pieters, GEOCHET Oct 10 '12 at 11:55

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Why would it be using a plugin? – Bart Oct 10 '12 at 11:36
Hey Bart ! I am not sure.., just thought it would be using a plugin as there are many jquery feedback plugin that offer the similar kind of functionality. – Yasser Oct 10 '12 at 11:39
@Bart you really think this link has the answer ?? how can this be a dupe ? – Yasser Oct 10 '12 at 11:40
I strongly suspect this was custom written, and no jQuery plugin was used. The effect is not that special to build - it's a simple .show() with a fade, isn't it? – Pëkka Oct 10 '12 at 11:41
It informs about all the tools and technologies used to develop the site. So one of them is most likely your answer. And as Pekka says, I suspect it's simply custom developed functionality. – Bart Oct 10 '12 at 11:41
I agree with @pek - All I can see is is a hover event triggering a fade in animation... Not really something you would need a plugin to do... – Lix Oct 10 '12 at 11:42
Thanks for your answer @Pekka – Yasser Oct 10 '12 at 11:47
up vote 8 down vote accepted

It's using plain AJAX, no plugin. It boils down to this code executed upon clicking a feedback button: (b is the post ID)

    type: "POST",
    url: "/vote/anon/" + b,
    data: {
        votetypeid: "Yes" == a.val() ? 2 : 3
    complete: function () {}
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