AJAX目前已被广泛应用，在使用QTP测试AJAX应用时经常碰到需要等待AJAX操作完成数据加载的问题。relevantcodes.com的《QTP: Synchronization for AJAX Applications》这篇文章介绍了如何封装一个AjaxUtil对象来统一处理这些问题：
http://relevantcodes.com/qtp-synchronization-for-ajax-applications/
下面是一个使用AjaxUtil对象的例子：
SystemUtil.Run "iexplore.exe", "www.kayak.com"
If Not Browser("title:=Cheap Flights.*").Exist(10) Then ExitTest
AjaxUtil.ObjectSync = 30 ' Check if the added objects exist before we synchronize
AjaxUtil.StatusSync = 10 ' Wait for a max 10 seconds if there is no status change
'Add Objects to collection (Its mandatory that you add objects to the class)
AjaxUtil.AddObject "MyBrowser1", Browser("title:=Cheap Flights.*")
AjaxUtil.AddObject "MyTable", Browser("title:=Kayak.com Search Results")_
.WebTable("innertext:=.*of.*roundtrips shown.*|.*forget all.*", "index:=0")
AjaxUtil.AddObject "MyBrowser2", Browser("title:=Kayak.com Search Results")
Browser("title:=Cheap Flights.*").WebEdit("html id:=destination")_
.Set "Atlanta, GA - Hartsfield-Jackson (ATL)"
' Its mandatory that you set a browser for which you will run the test for changes in elements
AjaxUtil.SetBrowser "MyBrowser1" ' Required Step
' Synchronize for changes in objects:
AjaxUtil.SyncObjects "WebElement"
Browser("title:=Cheap Flights.*").WebButton("html id:=fdimgbutton").Click
'You can modify the ObjectSync and StatusSync times here for the next operations.
'Example: StatusSync is increased
AjaxUtil.StatusSync = 15 ' increase the StatusSync
'Synchronize with the flights table
AjaxUtil.SyncWebTable "MyTable"
'Test Complete - release dictionary
AjaxUtil.DestroyDict