Hi I would like to have one counter field which will be incrementing by 1 and at perticular time inverwal the field value would get reset and increment again by 1.Any suggestion please

Mark, i need the numeric value associated with each record...for example if i submit 1st record then counter field(numeric) should be 1...and if 2nd record is submitted then counter should 2..and so on...so from 1st April 2012  to 31st March 2013 if 300 records got entered then counter's value should be 300...now on 1st April 2013 counter should be reset to 0... and when the new record is added the value of that counter should be incremented as before....like 1,2,3,4.........