bootstrap-confirmation.js

$.rails.allowAction = function(link) {
  if (!link.attr('data-confirm')) {
    return true;
  }
  $.rails.showConfirmDialog(link);
  return false;
};

$.rails.confirmed = function(link) {
  link.removeAttr('data-confirm');
  return link.trigger('click.rails');
};

$.rails.showConfirmDialog = function(link) {
  var html, message;
  message = link.attr('data-confirm');
  html = "<div class='modal fade'>\n  <div class='modal-dialog'>\n    <div class='modal-content'>\n      <div class='modal-header'>\n        <a class='close' data-dismiss='modal'>&times;</a>\n        <h3>Request confirmation</h3>\n      </div>\n      <div class='modal-body'>\n        <p>" + message + "</p>\n      </div>\n      <div class='modal-footer'>\n        <a data-dismiss='modal' class='btn btn-huge btn-default'>Cancel</a>\n        <a data-dismiss='modal' class='btn btn-huge btn-danger confirm'>Confirm</a>\n      </div>\n    </div>\n  </div>\n</div>";
  $html = $(html)
  $html.modal();
  var $dialog = $html.find('.confirm');
  return $dialog.on('click', function(a) {
    return $.rails.confirmed(link);
  });
};

This updates the HTML to Bootstrap 3. It also gets rid of the id on the modal, and adds the click handler using the reference to the jQuery object already holding the form HTML in $html.