Ninja UI Dialog with a Form

example.js

var
  $form = $('<form/>'),
  $formInput = $('<input/>', {
    type: 'text'
  }).appendTo($form),
  $dialogCheckbox,
  $dialog = $.ninja.dialog({
    html: $form
  }).attach(function () {
    $dialogCheckbox.attr({
      checked: 'checked'
    });
  }).detach(function () {
    $dialogCheckbox.attr({
      checked: false
    });
  });

$dialogCheckbox = $('<input/>', {
  type: 'checkbox'
}).change(function () {
  if ($dialogCheckbox.attr('checked')) {
    $dialog.attach();
  } else {
    $dialog.detach();
  }
});