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Validating input containing a string in netsuite

edited Dec 2, 2019 6:06PM in SuiteCloud / Customization 3 comments

I have a custom field called Key Number, it is a string of digits containing 2 digits and starting with 9. This field is mandatory. How do I check and verify the user's input to make sure user enters
1. 3 digits
2. first digit starting with '9'.

If not, to set off an alert saying. User input invalid. Entry must start with 9 and contain 3 digits.

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