no css effect when printing!

I made a page contains specific control, and i used CSS and it works okay and applied on the page, but when i print the control which contains my data , no effect to the CSS on the paper . what is the problem ?开发者_如何学Python the control exists in div.

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Background colors and images won't be printed by default by most browsers.

IE reference: http://support.microsoft.com/kb/296326

Firefox reference: How do I Make Firefox Print a Background-Color Style?

Easy enough to find for any other browser if you want.

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have you used @media inside the css source or the media-attribute eg media="screen"inside the html source code? that might be the reason.

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Check this interesting read at A List Apart: http://www.alistapart.com/articles/goingtoprint/

It is a comprehensive guide at using print style sheets.