version=5.03
31/08/2007
corrected a "NaN error" in checkfile.


version=5.02
22/08/2007
Added a few exercises: using Javascript to allow 
a "normal" interval-syntax, avoiding the "WIMS unmatching parenthesis error"

version=5.01
14/07/2007
Horrible data_file mixup's (noticed by W.van Briemen)
Changed DHTM exercise to IE compatible .

version=5.00
1/07/2007
This module is a ready for a "common authordir"
As temporary fix, the commonpart is present in all new modules...


