Run JavaScript On Submission?

I tried this:

jQuery(document).on('click','#un-feedback-submit',function() {
	console.log('Ow!');
});

Then I realized the form is in an iframe, so that doesn’t work.

I tried this in my theme’s functions:

function trackFeedbackSubmission() {
	echo '<script type="text/javascript">
		ga("send","event","form","contact");
		console.log("Submission tracking attempted");
	</script>';
}
add_action('un_feedback_created','trackFeedbackSubmission');

Which results in this error in the JavaScript console on form submission:

SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data