I found this on a great site Spice Up Your Blog it is a Pop on a website that has a like box for facebook it is great I use it and I'v seen a great out come. It is in HTML all you have to do is copy the code on the site the goto Layout > Gadgets > HTML > Paste

h**p://www*spiceupyourblog*com/2012/01/one-time-facebook-pop-up-like-box-for*html

Feel free to give thanks & rep

Here is it in action:

h**p://super-bowl46*blogspot*com/

Sorry cant post links yet

I can pm them if your lazy.