yui/yui3 — pull request #1429 by zhiyelee (2013-11-22 05:57:38+00:00)
Title: fix deprecated event.returnValue in Chrome 

As @hatched reported in https://github.com/yui/yui3/issues/1417

chrome now issues a console warning
`event.returnValue is deprecated. Please use the standard event.preventDefault() instead.`