Facebook tracking on submit button

Hello!

I’ve searched through similar threads, but it mainly focuses to google analytic codes for tracking…

how do i insert this code on the action of submitting a contact form:

<!– Facebook Pixel Code –>
<script>
!function(f,b,e,v,n,t,s){if(f.fbq)return;n=f.fbq=function(){n.callMethod?
n.callMethod.apply(n,arguments):n.queue.push(arguments)};if(!f._fbq)f._fbq=n;
n.push=n;n.loaded=!0;n.version=’2.0′;n.queue=[];t=b.createElement(e);t.async=!0;
t.src=v;s=b.getElementsByTagName(e)[0];s.parentNode.insertBefore(t,s)}(window,
document,’script’,’//connect.facebook.net/en_US/fbevents.js’);
fbq(‘track’, ‘Lead’);
fbq(‘init’, ‘162940’);
fbq(‘track’, ‘PageView’);
</script>
<noscript><img height=”1″ width=”1″ style=”display:none”
src=”https://www.facebook.com/tr?id=162940&ev=PageView&noscript=1&#8243;
/></noscript>
<!– End Facebook Pixel Code –>

thanks so much!