Button for Form pop up using source code

I am trying to add iframe source code to a button or an image in Wix. I am using jotform and they are supplying me with the pop up source code. I want my form to pop up on its own small window by clicking a button or an image. Please help.

You can open a website as a popup: Link
You can create a new lightbox(popup) and place an iframe there: Link