blogger follow comments by email

<!-- blogtrottr comment email follow / mspotilas 2011 -->
<b:if cond='data:blog.pageType == &quot;item&quot;'>
<b:if cond='data:numPosts == 1'>
<div class='comments-email-subscribe'>
<script type='text/javascript'>
//<![CDATA[
function validateEmff()
{
  var mail = document.forms["emff"]["btr_email"].value;
  if(mail == "") {
    window.open("http://blogtrottr.com/?subscribe=" + document.forms["emff"]["btr_url"].value, "_blank");
    return false;
  }
  if(!/^[a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-zA-Z]{2,6}$/.test(mail)) {
    alert('"' + mail + '" is not a valid email address');
    document.forms["emff"]["btr_email"].focus();
    return false;
  }
  return true;
}
//]]>
</script>
<b:loop values='data:posts' var='post'>
  <b:if cond='data:post.allowComments'>
    <b:if cond='data:post.feedLinks'>
      <form action='http://blogtrottr.com' method='post' name='emff' onsubmit='return validateEmff()' target='_blank'>Your email: &amp;nbsp; <input name='btr_email' size='25' type='text'/><input expr:value='data:blog.homepageUrl + &quot;feeds/&quot; + data:post.id + &quot;/comments/default&quot;' name='btr_url' type='hidden'/><input type='submit' value='Subscribe'/> via <a href='http://blogtrottr.com/' target='_blank'>Blogtrotter</a>.</form>
    </b:if>
  </b:if>
</b:loop>
</div>
</b:if>
</b:if>