Question: So I just finished working on a site on my computer, and I put it on a flash drive and put it in my public\_html folder on my server. When I type in <http://localhost/> I get my index page but the css is gone and all the images are gone. 

How can I fix this?

Answer: 
Sorry, this question is from years ago. For those interested, the problem was due to permissions on my server.
Sometimes all that you need to do is clear your browsers cache, which will store the pages current state and will sometimes ignore any new changes to the css and sometimes even images until the cache is cleared.