can't keep footer on the bottom

pls help, I can't keep my footer at the bottom.
 main.css index.html
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Tom BeckCommented:
It's hard to see the problem with just the html and one css. Can you provide the other css or a link to a live page?
lisakilgoreAuthor Commented:
not reallly, it is for a class.. I guess I assumed people would do what I am doing, and that is just using css and html to view on computer-no need to have it live (?)
Tom BeckCommented:
Here is how your page renders using the html and the main.css. Is this correct? The footer is on the bottom.
Tom BeckCommented:
Forgot the image.

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lisakilgoreAuthor Commented:
you know, might have been my cache was messing me up, sorry, but I do have a brand new problem.
I will post it now,
thanks you!!!!
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