wordpress in sub-domain (mod_rewrite)

I have my wordpress in a sub-folder for my domain.

I’d like that sub-folder to be my main folder for my domain.

example:

People visit my site at example.com, wich will be directed to example.com/site

But, i do not want them to see the /site url, i want everything to run with mod_rewrite.

Example 2:

they goes to the post example.com/site/?p=354

but in their url it says example.com/?p=354

You know what i mean? How can i allow this with my wordpress instalation?