https://github.com/mzubala/jquery-custom-scrollbar

jQuery Custom Scrollbar is a jQuery plugin that lets you add fully customizable scrollbars to your sites. With the plugin you can apply any css styles you want to your scrollbars.

Features

• vertical and horizontal scrollbars you can style your own way
• scrolling by mouse dragging, mouse wheel, keyboard – just as you would with native browser scrollbar
• touch scrolling on mobile devices (Android, iPhone and iPad)
• a couple predefined skins showing you how to style scrollbars
• simple api that lets you scroll programmatically and be notified about scroll events

Requirements

The plugin supports all major browsers: Chrome, Firefox, IE 7+.

To use the plugin you obviously need jQuery (it should work in jQuery 1.4 and later versions).