Go to the ‘Settings’ page, then click on ‘Advanced’ in the upper right hand corner.  Under ‘Text Validators’, you can add / remove new validators for text fields.

  • Label – The label of the validator in the ‘Validation’ dropdown for the Text element.
  • Error Message – Message displayed for an invalid input. Should include one ‘%s’, which will be repaced with the particular element’s label when using the form.
  • Regular Expression – A regular expression, used in JavaScript’s String.match() function.  You should include the ‘/’ character at the beginning and end of the regular expression.