Catch 22!

[Miguels]

May not be the right forum.. but have a notes database, the emp pushes button it goes to the last portal and into the Notes field they type.. meanwhile before this step they've click a button to start a timer.. "Which is only a stamped start time and end time and a calc to get duration." however the catch 22 is that my boss naturally wants the notes to be secure so no one can modify them.. however when the user clicks the button to end the time.. this commits the note record which is setup on an Event Script to autopopulate other fields.. and time taken for writing note must be caputured. See my problem? I heard somewhere that they're may be a way to run a clock from within a field using PHP or fx.PHP? Any ideas guys?