How would I remove the $ marks from this JavaScript code?

[Paul_Wilkins]

Detailed instructions on converting jQuery to JavaScript is found at:

Converting jQuery to vanilla JavaScript, a step by step guide

Frequently I see on here people asking to deal with jQuery, for example with converting it to vanilla JavaScript. As a result I thought that I’d provide a worked example of converting code from jQuery to vanilla JavaScript, using jQuery that is a bit more complex than the standard standard conversion tutorials. Along with event handlers this guide uses custom backgrounds that change to match the different tab colors, and deals with animation too. The original code is from a tabbed panel on cod…