Ticket #5304 (closed bug: fixed)
jQuery + IE + Prototype fails with "Object doesn't support this property or method"
|Reported by:||ecmanaut||Owned by:||john|
When using jQuery in conjunction with Prototype (my example is on http://www.nytimes.com/), jQuery's detection of the browser's getElementsByClassName capabilities in  fails in IE(7). This is probably another variant on #4042 and #4058, but which still exhibits with jQuery trunk, or  at current time of writing.
The test for document's or document.documentElement's getElementsByClassName finds Prototype and assumes it to be native capability -- but the actual code uses a freshly created div's such method, which does not exist, so things fail.
Patch fixing the issue attached.