how to force like on page load ?

EDIT : forget to mention in the title : Facebook Likes
hey guys, so i'm trying with no success to force people into liking my Facebook page when entering my website.
i do not have a lot of traffic, Just trying to have fun with what i got.

But i cannot get inside the html of the facbook like button iframe : Blocked a frame with origin "MYORIGIN" from…

how to force like on page load ?