Hi TygerTyger,
The form validation is currently JS only - as it's only a single page for us, I just wanted to get it up quickly. If it becomes a problem, I can amend.
There is however PHP validation for attempted mass spamming in place, so the form can't be abused to send mails elsewhere.
The "false" is a PHP variable

The first PHP variable name is $send so in the actual code it makes more sense: if ($send == true). And for the 2nd it's: if ($submitError == true).
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Hi Matt - glad you like it! I think for us it only works as "mini ad" page though - for the main site, there's just much more info which customers need.