any tool to view currently running scripts behind the scenes on a web page?

I have a asp.net application with silverlight file upload control (http://silverlightfileupld.codeplex.com/). when i try to hide the control after popup of modalpopupextender, some thing is running behind scenes, which takes all of the resources. Want to check w开发者_如何转开发hat script is running behind the scenes.

Firebug on Firefox, or Chrome's built in developer tools