Just like <http://twitter.github.com/bootstrap>,

The site what I working on now is responsive.

I would like to remove **transition animation** 

when I click the collapsed navbar menu button.

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![enter image description here](https://i.stack.imgur.com/GvSpb.png)

Above picture is the screenshot of what I'm asking.

At **TOP-RIGHT-CORNER**, there is a three-lined menu button.