survey.html

<html>
  <head>
    <title>Survey</title>
    <script type="text/javascript" src="//test-ads.klickpush.com:3030/preview/2.js"></script>
  </head>
  <body>
    <input id="email" type="text"></input>
    Provide your email address and click <a id="submit" href="/success.html?email=__EMAIL__">here</a>
  </body>

  <script type="text/javascript">
    function sender(){
      var tmp_email = document.getElementById('email').value;
      if(tmp_email.length > 0){
        console.log('long enough')
        var tmp_submit = document.getElementById('submit');
        tmp_submit.href = tmp_submit.href.replace('__EMAIL__', encodeURIComponent(tmp_email));
      }
    }

    var tmp_submit = document.getElementById('submit');

    if (tmp_submit.addEventListener) {
      tmp_submit.addEventListener('click', sender, false);      
    } else {
      tmp_submit.attachEvent('onclick', sender);
    }


  </script>
</html>