How to Prepopulate text field using Lightbox code?

How do I alter the Lightbox code to prepopulate text field "id_54" ?

<script src ="https://form.jotform.com/static/feedback2.js" type="text/javascript"></script><script type="text/javascript"> var JFL_82386878484982 = new JotformFeedback({ formId: '82386878484982', base: 'https://form.jotform.com/', windowTitle: 'Sponsor a Sonrise Babies Home Child', background: '#FFA500', fontColor: '#FFFFFF', type: '2', height: 600, width: 550, openOnLoad: false }); </script> <a class="btn lightbox-82386878484982" style="margin-top: 16px"> "Square" v1 - SPONSOR BABY (Sonrise Babies Home) </a>

Here is an example:

https://pastebin.com/raw/9qNECPtc

Related guide:

Adding parameters in Lightbox and Feedback forms

Thank you.

You guys are so responsive!
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