How to Set Acrobat JavaScript Date Validation for a 10-Day Deadline
Question details
The user needs to implement custom validation in a PDF form to prevent a date entry that is less than ten days from the current date and display a specific alert.
- Product
- Adobe Acrobat PDF Forms
- Device & OS
- not provided
- Scenario
- Configuring a PDF form field to enforce a minimum 10-day advance deadline using JavaScript.
- Observed behavior
- The PDF needs a mechanism to calculate the difference between the current date and the inputted date, rejecting inputs within the 10-day window and triggering a custom approval message.
Ensure you have access to a PDF editor that supports JavaScript form validation, such as Adobe Acrobat Pro, and verify that your date field is formatted to match the input format expected by your script.
Use a Custom Validation Script in PDF Field Properties
Apply a custom JavaScript snippet to the specific date field to calculate the time difference and alert the user if the deadline constraint is not met.
This script uses the util.scand method to parse the entered date and compares it to the current time. If the difference is less than 10 days (864,000,000 milliseconds), it rejects the input and shows a custom alert message.
Launch your PDF document in your PDF editor and enter the 'Prepare Form' or Form Editing mode.
Right-click the target 'Suspense Date' text field and select 'Properties' from the context menu.
Click on the 'Validate' tab within the Text Field Properties dialog box.
Select the 'Run custom validation script' option and click 'Edit'. Paste the following code: if (event.value) { var d = util.scand("m/d/yy HH:MM", event.value); var now = new Date(); var tenDays = 864000000; if (d.getTime() - now.getTime() < tenDays) { app.alert("As per SOP, your request must be approved by the CoS."); event.rc = false; } }
Click 'OK', close the properties window, and test the field by entering a date less than 10 days away to ensure the pop-up alert successfully triggers.
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Frequently Asked Questions
Why is the custom JavaScript validation not working in my PDF?
This typically happens if the date format entered by the user does not match the format specified in the util.scand function. Ensure your form field is set to enforce a specific format like 'mm/dd/yyyy' to avoid parsing errors.
How do I calculate different time periods in Acrobat JavaScript?
Time in JavaScript is calculated in milliseconds. For a 10-day period, you multiply 10 days * 24 hours * 60 minutes * 60 seconds * 1000 milliseconds to get 864,000,000. You can adjust this math for other time frames like 5 or 30 days.
Can I stop users from saving the PDF if the date is invalid?
Yes, by setting event.rc = false; in the validation script, the field actively rejects the invalid input, forcing the user to correct the date before they can properly proceed or submit the finalized form data.
