http://www.noupe.com/jquery/50-amazing-jquery-examples-part1.html

http://www.dhtmlgoodies.com/index.html?whichScript=show_hide_content_slide

http://woork.blogspot.com/2008/03/two-css-vertical-menu-with-showhide.html

tabbeb content display in single place ajax effect
http://www.ibm.com/developerworks/xml/library/x-ajaxxml10/#fig2

http://www.gowestwebdesign.com/demos/jquery-effects-1/#thecode