Validating a form using java script

06-Jul-2017 03:51

Otherwise it returns a message describing the error and highlight appropriate element with yellow.validate Empty ( ) The function below checks if a required field has been left empty.At first we check if the user entered anything at all in the email field.

By using Field Val UI to build a form and then Field Val to validate the input, you can pass the error straight back into the form."Bad data" are already filtered out when input is passed to the server-based program. Client side form validation usually done with javascript.