Customizable Scroll Bars
Customizable scroll bars on various browsers is very much possible and viewable. You can add a customized scroll bar at your website without the complaint of any browser not supporting the bars if you read about the FleXcroll Standards Compliant ScrollBar. The author of FleXcroll describes about supporting features of a keyboard scroll bar and mouse-wheel supported scroll bar along with text selection.
Hesido, the author, has tried but it is not much impressive though. The best solution to this problem is to design an unobtrusive method to write Hyper Text MarkUP Language. The FleXcrol should be able to handle most of the load of the user and content should be accessible with no javascript support or when it is, off.
Many browsers such as Opera version 8.5 and version 9, Firefox version 1.5 and version 2.0 for Linux, MAC and PC, Webkit, Internet explorer version 5, 5.5, 6, and version 7 have been tested to know if the FleXcroll works for them or not. Only Internet Explorer for MAC seems to not supporting the FleXcrol.
You can download the scroll bar from many links present on internet to use for non-commercial website pages or home user. Commercial users have to pay the usage fee. In order to find more details visit the homepage of author.

