Atrribute conversion on form submission to previous Unbounce page

formExtConversionClick.html

<script type="text/javascript">
    function yourSubmitFunction(e, $) {
        e.preventDefault();

        var _ubaq = _ubaq || [];
        _ubaq.push(['trackGoal', 'convert']);

        var ub_script = document.createElement('script');
        ub_script.type = 'text/javascript';
        ub_script.src =
            ('https:' == document.location.protocol ? 'https://' : 'http://') +
            'd3pkntwtp2ukl5.cloudfront.net/uba.js';
        var s = document.getElementsByTagName('script')[0];
        s.parentNode.insertBefore(ub_script, s);

        $('.lp-pom-form form').submit();
    }

    lp.jQuery(function($) {
        $('.lp-pom-form .lp-pom-button').unbind('click').bind('click.formSubmit', function(e) {
            if ($('.lp-pom-form form').valid()) yourSubmitFunction(e, $);
        });

        $('form').unbind('keypress').bind('keypress.formSubmit', function(e) {
            if (e.which === 13 && e.target.nodeName.toLowerCase() !== 'textarea' && $('.lp-pom-form form').valid())
                yourSubmitFunction(e, $);
        });
    });
</script>