Can you reverse what microsoft does to your code?

Can you reverse what microsoft does to your code?: "I just made a big mistake by loading all my sites pages to Word from dreamweaver to do a spell check (i couldnt find a dang spell check on dreamweaver) so it all checked and i load it back up to dreamweaver and all the code is changed and all the pages are messed up a little, this sucks i just got done rebuilding this site for the second time and its messed up again, is there a way i can fix it without having to go through the code and changing everything?"