Pre-populating email address in subscription forms through visible fields

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Note: Please ensure that you have access to an experienced JavaScript developer, because Marketo Technical Support is not set up to assist with troubleshooting custom JavaScript.

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The default subscription management records the email address through hidden fields when users click the unsubscribe link in emails.

A simple JavaScript can capture the email parameter and pre-populate a visible field.

Drag and Drop a "Custom HTML" object into the top of the unsubscribe landing page.

Add the following code:

<script language="Javascript" src="/js/public/jquery-latest.min.js" type="text/javascript"></script>

<script src="/js/public/jQueryString-2.0.2-Min.js" type="text/javascript" ></script>

<script>

  // to set cookies.  Uses noConflict just in case

  var $jQ = jQuery.noConflict();

  var pEmail = $jQ.getQueryString({ ID: "Email" });

document.getElementById("Email").setAttribute("value", pEmail);

</script>