I have a current web build with a right sidebar that is a fixed position. I have tried to positioning from the right but don\'t want it overlapping other divs content.
That example site is using more than just css to generate that effect. It is also using a MooTools plugin: ScrollSpy. http://davidwalsh.name/mootools-scrollspy
View the source at http://demo.rickyh.co.uk/css-position-x-and-position-y/ to see the scripting and the full css.