jquery-xml.js

      $.ajax({
        type: "GET",
        url: $(this).attr('href') + "." + $(this).data("format"),
        dataType: "html",
        beforeSend: function() {
          $("#dialog").dialog("open");
          $("#dialog").dialog("option", "title", "Loading…");
          $("#dialog").html("<div id=\"loadingbar\"></div>");
          $("#dialog").dialog("option", "width", "200px");
          return $("#loadingbar").progressbar({
            value: false
          });
        },
        success: function(xml) {
          $("#dialog").dialog("option", "title", $(xml).find("title").text);
          $("#dialog").html($(xml).find("content"));
          return $("#dialog").dialog("option", "width", "auto");
        }
      });