Convio embedded survey - duplicates the email address of user into hidden CRI email field

Convio embedded survey

<!-- Bringing in jQuery -->
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>

<convio:session name="28" param="EMBED:14841"></convio:session>

<script>
$(document).ready(function() {
 //$("input#cons_email").parents("tr.old-school").addClass("hide");
 $("input#cons_email").parents("tr.old-school").hide();
 $('input[name="3340_14841_3_12143"]').bind("keyup change", function (){
   var email_input = $(this).val();
   $("input#cons_email").val(email_input);
 });
 
 //Center align survey table
 $('tr.old-school td').attr('align','center');
 
 //Hide required 'star'
 $('td.req').empty();
});
</script>