Issue #1363112 by mparker17, mgifford, tlattimore, Jacine, dcmouyard, bowersox, ry5n, ahdiaz: Simplify names of 'element-x' helper classes.

Issue #1168246 by sun, mgifford, Manuel Garcia, mbrett5062, ry5n, Everett Zufelt, nod_, aspilicious, deviantintegral, tim.plunkett: Freedom For Fieldsets! Long Live The DETAILS.

Issue #1749782 by pascalduez: Use event.preventDefault(); and event.stopPropagation(); instead of return false;.

Issue #1419968 by nod_, cosmicdreams, droplet, tim.plunkett: Replace $('selector', domelement) with $(domelement).find('selector').

Nate Lampton authored Oct 30, 2011 and catch committed Nov 01, 2011

Issue #22336 by quicksketch, scor, boombatower, and rfay. Move all core Drupal files under a core subdirectory.

- Patch #676800 by casey, sun, james.elliott, cosmicdreams, seutje, Jacine: made fieldsets work on all browser.

#541568 by brandonojc, mgifford, Everett Zufelt, and sun: Fixed Link to expand / collapse fieldsets has poorly accessible link text.

- Patch #444344 by kkaefer, sun, Rob Loach: this change introduces a jQuery .once() method which streamlines the way behavior functions work. Previously, we had to manually ensure that an element is only initialized once. Usually, this happens by adding classes and selecting only those elements which do not have that class. However, this process can be separated out into a jQuery ‘filtering’ function which does all the grunt work.

#323112 by dmitrig01, kkaefer, quicksketch, frando and many many more: Now presenting... Vertical Tabs. Fantastic new UI improvement for node forms and hopefully more in the future.

#125030 by kkaefer, quicksketch, dvessel, Steven, and John Resig: Allow compatibility with other JavaScript libraries.

#146462 by Gurpartap Singh: update jQuery to 1.1.2 and make the core JS files compatible with the new version