This article will show you how to add Facebook like and share to your InstantSite webpage.
Login to your 123-reg control panel.
Click on the InstantSite Manage button.
Login to the InstantSite account that you would like to edit.
From the right hand toolbar, drag the Script button onto your page where you like the Facebook like button to go.
Create a Facebook like button by using Facebook developers.
From the Script widget, click the Properties button.
Please note: You will only see the like button when your website is published.