example of adding Javascript to run after the checkout button is clicked with PMPro

my_pmpro_js_on_submit.php

// example of adding Javascript to run after the checkout button is clicked
function my_pmpro_js_on_submit() {
	?>
		<script>
			jQuery(document).ready( function(){
				jQuery("#pmpro_form").submit( function(){
					alert("hello world!");
				});
			});
		</script>
	<?php
}
add_action('pmpro_checkout_after_form', 'my_pmpro_js_on_submit');