Problem with trills

Hey guys!

I got a problem learning this piece: Bach's Praeludium XI BWV 856 https://i.servimg.com/u/f46/16/66/17/92/naamlo13.png
I'm not sure how to play the trills. I do have some kind of a 'picture' of the notes how it should be played, but I am not sure. I need your help to confirm/correct my thoughts.

My idea of how to play the trills:
3rd measure:
A-B-C-B-C-B........B

D-E-F-E-F-E.........E
4th measure:
D-C#-Bb-C#-D-C#-D-C#..........C#

E-F-G-F-G-F-G-F...........F

Here's the link again:
https://i.servimg.com/u/f46/16/66/17/92/naamlo13.png

Thanks guys!

Here is a picture with how to perform baroque ornaments:
http://en.wikipedia.org/wiki/File:Baroque_Trill_Instructions.png
Hopefully that will help, I'm not 100% sure that these are the correct ways though.

Your ideas were right, except on the C#: you should play B C# D and not Bb C# D.

Thank you for your help Rickard And Mattieu!! I appreciate it!