Details
Description
the function nextSCO and prevSCO are used in AICC and SCORM 1.3 datamodels but these functions seem to have been committed to 1.5 stable but never landed in HEAD so will cause JS errors in the browser if triggered
this has been reported at least once in the forums(but never logged as an issue)
http://moodle.org/mod/forum/discuss.php?d=95929
the way next and prev is calculated has changed in Moodle 2.0 but this should probably be backported using the correct 1.9 method as well.