在jqueryajax中使用jqueryui对话框

代码如下:

var form = document.forms["orderDefinition"];

form.elements["formChangeRequest"].value = "true";
$.ajax({
  type: "POST",
  url: "ajax/possibleValues.html",
  data: $("form#orderDefinition").serialize(),
  success: function(response){
    $('#usercontent .sleeve .toprow').html(response);
    applyValidation();
  }
});

$("#waitingMsg").ajaxStart(function(){
      $(this).dialog({modal: true});
  }).ajaxStop(function(){
      $("#waitingMsg").hide();
 });