regluit/frontend/templates/cardscripts.html

<script type="text/javascript" src="/static/js/loader-gif.js"></script>
<script type="application/x-javascript">

var $j = jQuery.noConflict();

$j(document).ready(function() {
    // don't let users modify their pledge amount on this page; it's just here for reference
    // if they modified it here we'd have to faff about with validating premiums
    if($j('#id_work_id').prop('value')!=""){
    $j('#id_preapproval_amount').prop('disabled', true);
    }
});
</script>