The DebugBar V4.1.1 is an Internet Explorer plug-in that brings you new powerful features :
- DOM Inspector: View DOM Tree and modify tags attributes and css attributes on the fly to test your page
- HTTP Inspector: View HTTP/S request to check cookies, GET and POST parameters, view server info
- HTML Validator: Validate HTML code to correct and optimize your code and html size of your page
- And many more features: See page cookies, get pixel color on a page, make a page screenshot...
For Scripting Debugging, there's a post in IE Blog: