Web page not printing in full color

When i print the web with colours and background colors etc. the output pdf shows up in black and white, o/p is fine but the background beauty of the page is Gone, its all black and white,

                                           info is all there and pictures are also reproduced but no background its theblack and white, with words.


Secondly is it possible to reproduce a web page as pdf in Lossless quality?


OS: win xp sp3

browser: Mozilla firefox ver 3.6.13