Monday, August 13, 2007

Really Easy Field Validation

Form validation is a crucial thing in web applications and making them sometimes requires hard work. Here’s a form validation script that is very easy to use. It has a number of tests built-in but is extensible to include your custom validation checks. Here’s the list of tests available to add to your field elements:

  • not blank – required
  • a valid number
  • digits only
  • letters only
  • only letters and numbers
  • a valid date value
  • a valid email address
  • a valid URL
  • a date formatted as; dd/mm/yyyy
  • a valid dollar value
  • first option e.g. ‘Select one…’ is not selected option
  • At least one textbox/radio element must be selected in a group

Here is a demo of the field validation.

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