Prototype JavaScript framework: Prototype 1.7 RC1:
Prototype 1.7 RC1: Sizzle, layout/dimensions API, event delegation, and more
April 5th, 2010
We've just tagged the first release candidate of Prototype 1.7: a major new version with some major new features."
http://prototypejs.org/2010/4/5/prototype-1-7-rc1-sizzle-layout-dimensions-api-event-delegation-and-more
