Is it possible to combine Ajax post with jQuery UI dialog? And I want to process the ajax reponse in JSON to HTML for showing inside the Dialog box

       var url = AJAX_URL+requestId+'/'+userId;
       // Need to POST the requestId and userId instead of GET

        $("body").append("<div id='dialog-modal'>Loading...</div>");
        $("#dialog-modal").dialog("destroy");
  $("#dialog-modal").load(url).dialog(
   {
    modal: true,
    title: "Update Status",
    buttons: {
     Cancel : function() {
      $(this).dialog('close');
     },
     Update: function() {
      // Do something
     }
    }
   }
  );