Módulo Joomla

Make your floating sidebar visible at all times, making it permanently visible while scrolling.

This module works simply by putting the names of div or class you want to stick on the Div name field. If it is a div to stick, should put it for example #container and if is a class it should be example .container. Multiple itees should separated by symbol , Example you have divs left and right to slide, the code should be #right, #left

Check documentation