scrollbar usability
July 15th, 2005 
Comments(0)
Comments(0) Jacob Nielsen from Useit.com wrote an 
article on scrollbar design and usability.
There are five essential usability guidelines for scrolling and scrollbars:
– Offer a scrollbar if a page has scrolling content. Don’t rely on auto-scrolling, which people might not notice.
– Hide scrollbars if all content is visible. If people see a scrollbar, they assume there’s additional content and will be frustrated if they can’t scroll.
– Comply with GUI standards and use scrollbars that look like scrollbars.
– Avoid horizontal scrolling on Web pages and minimize it elsewhere.
– Display all important information above the fold. Users often decide whether to stay or leave based on what they can see without scrolling.
in short… keep it simple stupid (KISS)
Here’s a more detailed study in Flash Usability
