Hide link on MTurk

gistfile1.html

<!-- paste this at the top of your HIT's source -->

<script type="text/javascript">
function turkGetParam(name) {
    name = name.replace(/[[]/,"\[").replace(/[]]/,"\]");
    var regexS = "[?&]"+name+"=([^&#]*)";
    var regex = new RegExp(regexS);
    var results = regex.exec(window.location.href);
    if (results == null) {
        return "";
    } else {
        return results[1];
    }
}

document.addEventListener('DOMContentLoaded', function () {
    var assignmentId = turkGetParam('assignmentId');
    if (assignmentId != '' && assignmentId != 'ASSIGNMENT_ID_NOT_AVAILABLE') {
        document.querySelector(".hiddenUntilAccept").style.display = 'inline-block';
    }
}, false);
</script>
<style type="text/css">.hiddenUntilAccept { display: none; }
</style>

<!-- wrap your link in a div or span of class hiddenUntilAccept-->
<p>Spreadsheet (hidden until HIT accepted):
<span class="hiddenUntilAccept"><a href="${surveyurl}" target="_blank"></a></span>
</p>