Hi,

You cannot have this information using DebugBar.

You can see current value of a js function using javascript console under debugbar (do for instance : alert(myvar)

A better tool for Javascript is companion.JS where you will have a javascript console like the one in firebug and you will be able to get current value of any variable or object you need.

Tools will improve in the future to provide the kind of info you requested.
I am working on the next IETester release so far...

Thanks for your feedback.