Javascript, track iframes redirecting top window

Question

Since there is no way to prevent an iframe from redirecting the top frame besides sandboxing which prevents other features required for viewability tracking I would like to trac

Answer 1

From the individual iframes, can you set a cookie when the redirect happens? Say it happened from iframe1, you may set a cookie like

document.trackFrame = "FrameName=iframe1";  

And once the redirect completes, can you try reading the cookie and there by determine which iframe caused the re-direct?