If i have to Automate an application developed in AJAX which tool (QTP,WinRunner)would be more useful. Does Load runner has a protocol to support AJAX?

I too am having issues producing good load test data with our new AJAX app. Has anyone at least used WinRunner or QTP?

Hi all .. Can anyone tell me how to automate the AJAX application with QTP9.0 as it is not recognising the objects..Do we require a Addin.

Yes! AJAX is browser dependent technology.
Ajax is not a programming language ; You can say it is a combinations of main 3
languages. DHTML, Java script and XML.

Ajax engine rather Ajax run on  Firefox, Opera 8, Safari and later Mozilla builds and theMicrosoft equivalent ActiveX object.

You can try SWExplorerAutomation from http://webiussoft.com to automate AJAX applications.

does Win Runner 7.5 support AJAX web based application implemented in Java?

LoadRunner support AJAX Apps. however Ajax protocol in LR are not as efficient as HTTP protocol. You can use HTTP protocol record AJAX web apps, but there's a lot of custom coding needs to be done if order for it work properly. AJAX protocols are heavily depended on memory, running more then 60 usr with 2GB of ram could cause the mechine to freez.