Flashbox is a simple, unobtrusive script used to overlay images on the current page using a combination of Javascript and Flash 8.Flash can show the following images SWF, JPEG, GIF, or PNG files.
(Support for unanimated GIF files, PNG files, and progressive JPEG files is added in Flash Player 8. If you load an animated GIF, only the first frame is displayed.)

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FlashBox, WordPress, Plugin