my site was down it seems .htaccess was emptied

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
My site was built under oscommerce shopping cart. It was working last night. This morning, when I woke up, I see the 500 Internal Server Error page. I called my hosting provider and they say it is due to some codes in htaccess file.
I then looked at the file and see the file was emptied. I don't know who did it, unfortunately I don't have a back up file for it.
Can someone fix this?

Skills required:
Shopping Carts
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