Checks if an e-mail address is defined for the current user.
Returns TRUE if an e-mail address is defined for the user.
Returns FALSE if an e-mail address is not defined for the user.
Checks whether the user is logged in and has an e-mail address before performing a function.
<@dynamichtml subscription_action_script@> function allowSubscription(form) { <$if IsLoggedIn$> <$if IsUserEmailPresent$> <$else$> … } <@end@>