validating email - or allow blank entry
Hi
I've successfully created a registration form (not using the built in version) - but in addition to the user name being unique, I also want the email address to be unique OR allow a blank entry.
When the form is submitted, my 'show if validation fails' text is displayed if the email address entry is blank (because there are other blank entries in the database) - how can I get it so that if an entry is made, it checks for 'unique-ness', but if blank, it ignores it.
Many thanks
Chris