Common username and password to protect particular directory

Hi friends,

I know how to protect particular directories in virtualmin. But I want to protect the directory by using common username and password so that any one can browse the directory by entring that username and password .As it should not necessary that the user/viwer has to be the member of the virtualmin. If i give UN or PW to any end Viwer then they are able to see that page or directory through browser.

Pls reply asap.waiting for your reply or solution.

Thanks & regard
pooja pathak