does users have to be loggin-in to click like button on my website?

I am selling bags and I intend to have a "开发者_运维百科like" button for each bags's page. Is all "like" buttons in my product pages linked to my main facebook page, or can it be programmed to link to individual products and churns out comments and discussions on the particular product only?

Secondly, do users have to be logged-in to click on the like button?

Hope my question is not confusing, the way i phrase it.

Thanks

yes user has to be logged in to FB to like any of ur products .. but FB takes care of the logging part if the user is logged out, don't worry ..

u can map the like button to various pages by changing the url field in the like iframe ..