List of Events available to trap in Scripts when saving a Dynamics CRM Form

CRM 3.0 has limited event detection made available using scripting. However It is now possible to detect which user action was performed to Save the form using the event.Mode property in the OnSave event.

You can gain more detailed information about the user actions in the OnSave event by referencing the event.Mode values. These values represent the buttons clicked by the user to save the record.

The following event modes are supported:

Entity	Event Mode	Value
All	Save	1
All	Save and Close	2
All	Save and New	59
Task, Phone Call, Letter, Fax, Appointment	Save as Completed	58
All	Deactivate	5
All	Reactivate	6
All	user-owned entities Assign	47
E-Mail	Send	7
Lead	Qualify	16
Lead	Disqualify	15

By checking the value of event.mode we can find out which button user has clicked and based on this take further action.

To cancel the Save operation event simply use the script below:
event.returnValue = false;