Knowing jQuery
You may have come across something like the following in a PrestaShop file:
$("p.neat").addClass("ohmy").show("slow");
This is how jQuery code looks. jQuery is basically a JavaScript library that allows easier and faster web development through simplifying Java scripting and AJAX programming.
The code is located in the js
folder in the specific theme directory. JavaScripts are more often used as add on modules.
Note
You may get better acquainted with jQuery at the following sites:
http://docs.jquery.com/Tutorials:How_jQuery_Works#jQuery:_The_Basics