Thanks to Col. Shrapnel I am using a VERY basic PHP script to send emails. The form is located here.

This is the script:

<?php
mail('[email protected]','Live Date Submission',implode("\n\n",$_POST));
header("Location: thankyou.html");
?>

When a user submits the form, they are redirected to a thankyou.html page. I want to edit the code to display a javascript alert, instead of a redirect. I don't have much PHP knowledge, so how would I edit this code to return a alert instead of a redirect?