A similar solution is available on the website, but you can use any of them, as in each case you have to choose yourself.
Support for the latest versions of Joomla 2.5 and 3.x.
A smooth transition to the top of the page when the button is pressed.
Set the speed of scrolling.
Settings: show or hide text, change background color, etc.
You can assign the button mapping in any corner of the screen.
Free support for manufacturer extensions.
The option to enable or disable jQuery to avoid conflicts of scripts.