2016-02-26 Planned deprecated functionality

cr_track, cr_track_id, cr_link, and cr_submit have moved to the global __CR as __CR.track, __CR.track_id, __CR.link, and __CR.submit
CR_QS is now called __CR.query
CR_Cookie is now called __CR.cookie

2014-01-18 Planned deprecated functionality

The following JavaScript functionality will be removed from our client-side JavaScript and will no longer be supported after March 1, 2014.

CRUser and crcookie variables
Memory functions: CRMemory_Set CRMemory_Get CRMemory_HiddenInput CRMemory_Output CRMemory
Cross code and related functions: CrossCodeOutput CrossCodeAppendURL LandingCodeOutput CRCookieOutput CrossCodeFormInput LandingCodeFormInput CRCookieFormInput CRCrossCodeMailTo
Cross code globals: CRCrossCode CRLandTime CRLandingCode CRActionMinutes
No landing flag: CRNoLand

The globals "okay" and "valid" are used by some of our snippets on old sites in JavaScript, and are confirmed still in use.