which to be added in like plugin url - fb or website?

Unfortunately, I cannot understand your question, but here is a link to one of our widgets that will allow you to add a Facebook like button to your form: http://widgets.jotform.com/widget/facebook_like_box 

This guide will help you to add the widget to your form: How-to-Add-a-Widget-to-your-Form

But, please provide us more details about what you're trying to achieve, we will be glad to help you.