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This is a very specific need, which will probably only be able to be accomplished by HTML5 or javascipt. <br />
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You won't be able to do this with just some CSS. 
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This is a very specific need, which will probably only be able to be accomplished by HTML5 or javascipt.

You won't be able to do this with just some CSS.

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I need a transparent div that holds a flash file that is centered with the dimensions 550 x 400 over a web page that has a background image. &nbsp;In addition, I need that transparent div to be visible for roughly 6 seconds and then dissipate automatically over the web page which will appear as clear after the flash file plays out in the foreground which has the transparent div. &nbsp;please tell me how I would do this. &nbsp;Thank you!
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I need a transparent div that holds a flash file that is centered with the dimensions 550 x 400 over a web page that has a background image.  In addition, I need that transparent div to be visible for roughly 6 seconds and then dissipate automatically over the web page which will appear as clear after the flash file plays out in the foreground which has the transparent div.  please tell me how I would do this.  Thank you!

Need a transparent div over a background image with a flash file in the foreground div

Cascading Style Sheets (CSS) is a language used for describing the look and formatting of a document written in a markup language. Usually used to change web pages and user interfaces written in HTML, it can also be applied to any kind of XML document. CSS is designed primarily to distinguish the content of a document from its presentation.