Lightbox Plus fix lightbox (don't scroll with scrollbar)

I am using the following lightbox:

http://serennz.sakura.ne.jp/toybox/lightbox/

It's simple and light. However, I don't like how it follows the scrollbar. How can I stop the lightbox following the scrollb开发者_开发知识库ar when its displayed?

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open the plugin's theme file(colorbox.css).

add overflow:hidden!important; to #cboxLoadedContent.

DONE.