Client-side setup 

<script type="text/javascript" src="/js/jquery-1.3.2.js"></script>
<script type="text/javascript" src="/js/jquery.autocomplete.js"></script>
<script type="text/javascript">
  $(document).ready(function(){

    $("form.enrol-form input#house").autocomplete(
      '/js-ac/anon/residential-address',
      {
        matchSubset:false,
        matchContains:false,
        highlight: false,
        cacheLength:1,
        autoFill:false
      }
    ).result(function(event, address) {
      $("form.enrol-form input#house").val(address);
    });

  });
</script>
<link rel="stylesheet" type="text/css" href="/style/jquery.autocomplete.css">