I am suggesting following accordions:
jQuery Accordion example:
http://www.stemkoski.com/downloads/jquery-accordion-menu/example.htm
http://www.i-marco.nl/weblog/jquery-accordion-menu/
http://roshanbh.com.np/2008/06/accordion-menu-using-jquery.html
http://jqueryfordesigners.com/demo/simple-slide-demo.html
this has single ‘jquery-1.js’ (79KB) un-compressed version with first visible accordion, onclick backgroud color change
MooTools Accordion example:
http://davidwalsh.name/dw-content/accordion.php
this has single ‘moo1.js’ (133KB) un-compressed version with first visible accordion, onclick backgroud color change
YUI Accordion example:
http://www.hedgerwow.com/360/mwd/accordion/demo.php?page=3
Other:
http://www.switchonthecode.com/tutorials/javascript-tutorial-inline-sliding-panels
My Code Book 