Hide/Show of Signature Pad in Contact Form7 using JavaScript

Hello All,

I am facing a new issue in ContactForm7 Plugin. I have used Signature Pad in this. I want to show Signature Pad only when a radio button is clicked. I am trying to do this using JavaScript.

The Problem is when I am showing signature Pad, else it is hidden initially, on certain condition, I am not able to write on it, however it is visible to me.

What should I do to solve this problem? Has anyone else facing similar problem?