Calculating the difference between days
since: yyyy.mm.dd
xxxx.mm.dd ( days since last time the date (mm.dd) occured)
until: yyy.mm.dd
xxx.mm.dd ( days until next time the date (mm.dd) will occur)
between:yyyy.mm.dd yyyy.mm.dd
yyyy.mm.dd xxxx.mm.dd ( days from from first date until next time the date (mm.dd) will occur)
xxxx.mm.dd yyyy.mm.dd ( days since the date (mm.dd) occured, as seen from second date)
xxxx.mm.dd xxxx.mm.dd ( days between dates in same year, this year is used. possibly a leapyear)
Returns a simple text which normally is a single integer, possibly negative
Returns ? if parameters does not make sence, or are in bad format
http://www.it.hiof.no/~borres/cgi-bin/ajax/days/daydiff.py?diff=until&date=2007-12-24
http://www.it.hiof.no/~borres/cgi-bin/ajax/days/daydiff.py?diff=until&date=xxxx-12-24
http://www.it.hiof.no/~borres/cgi-bin/ajax/days/daydiff.py?diff=since&date=xxxx-12-24
http://www.it.hiof.no/~borres/cgi-bin/ajax/days/daydiff.py?diff=since&date=1946-12-27
http://www.it.hiof.no/~borres/cgi-bin/ajax/days/daydiff.py?diff=between&date=xxxx-12-24&date2=xxxx-12-31
http://www.it.hiof.no/~borres/cgi-bin/ajax/days/daydiff.py?diff=between&date=2007-12-24&date2=xxxx-12-01
http://www.it.hiof.no/~borres/cgi-bin/ajax/days/daydiff.py?diff=until&date=2007-07-21