Detecting JavaScript redirections (window.location.href =...)

Hi! I hope it is the right place to ask.

I know how to detect META-Refresh redirections (look at Refresh
Blocker extension) and server-side redirection (look at
LiveHTTPHeaders). There is 1 type of redirections left - Javascript
redirections:

window.location.href = new_href;

Can I reliably detect it? onLocationChange won't work - it simply
detects -all- location changes (pressing links, back button, etc.)
Maybe there is a way to hook into the location.href setter?

Thanks in advance.