Toggles JavaScript execution on and off globally; when off, the PDF cannot execute JavaScript.
When the user's ability to create privileged locations is not disabled and locked, end users can bypass disabled JS by choosing Trust once or Trust Always via the Options button on the Yellow Message Bar. Admins can disable and lock JS execution by setting bDisableJavaScript to 0 in HKLM.
GUI mapping: Preferences > JavaScript > JavaScript panel > Enable Acrobat JavaScript
| Registry Hive | HKEY_CURRENT_USER |
| Registry Path | Software\Adobe\Acrobat Reader\2015\JSPrefs |
| Value Name | bEnableJS |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |