$(document).ready(function() {
  var $dialog = $('<div></div>')
    .html('<fieldset><div class=\"field\"><label for=\"Page name\">Page name</label><input type=\"text\" name=\"name\" ></div></fieldset>')
    .dialog({
      autoOpen: false,
      title: 'Create a new page'
    });
  
  $('#minibutton-new-page').click(function() {
    $dialog.dialog('open');
    // prevent the default action, e.g., following a link
    return false;
  });
});