function comment_approve(id,link) {
  var comment_approve = new Request.HTML ({
    url: link,
    update: 'comment_' + id,
    method: 'get'
  }).send();
}

function comment_unapprove(id,link) {
  var comment_unapprove = new Request.HTML ({
    url: link,
    update: 'comment_' + id,
    method: 'get'
  }).send();
}