How to make fixed css transparentbackground logo like this

Can someone pls tell me how to make a fixed transparent logo like in this site:
http://www.communitymx.com/


Thank you

 

The CSS code:

body {background:#FFF url(PATH_TO_YOUR_BACKGROUND_IMAGE) no-repeat fixed center center;}

Code (markup):

Background Image:
You can use Photoshop or something similar to make your background image. On the communitymx page, it is a faded out jpeg.

 

Thank you Manishk, Your always helping me
I have done it, here you can see http://www.hfolder.com/fixedlogo/

Thanks

 

Nice, I'd make it a little more subtle though, like in http://www.communitymx.com/