Simulating browser traffic for Windows

I have a few scripts that make calls to a webservice. These scripts are inserted in to a web page via an IHttpHandler. Idealy, i would like to simulate a bunch of people requesting the page, downloading the script and run any ajax request while the browser session is alive. I havent 开发者_高级运维been able to find any tools that actually run the javascript after its been downloaded. Are there any tools that do this? Are there any tools I can use that simulate a request that dont require Java?

You could give Selenium or WatiN a try.