Using Javascript to reset a form on document load

I am trying to reset all field vaules on a acrobat form to the default values, when the form is initially loaded.  I am trying to use the resetForm() method in a document level script, but not having any luck.

I have been able to reset fields after user inputs such as a button that resets the form, or a script the will reset a form prior to importing field data... but I need to ensure all data is removed from the form when the form first loads

Any ideas?