Adding ProveSource to your Joomla website is quite easy, follow the steps below:
Download and install Add Custom Javascript plugin here: https://extensions.joomla.org/extension/add-custom-javascript If you're not sure on how to install a plugin, you can follow this official Joomla guide
Create a custom.js file and add your ProveSource javascript code in itNOTE: you should only include the code between the <script></script> tags in the file
Upload the custom.js file to your server
In Joomla Go to Extensions > Plugins > Add Custom Javascript
In the Custom Javascript File Path option, enter the relative path to your custom.js file, for example: templates/mytemplate/js/custom.js
Enable the plugin
Save & Close
