With javascript, how do you get final result URL after 302 redirect on img src?

Question

If there is an img tag in a page whose final image it displays comes after a 302 redirect, is there a way with javascript to obtain what that final URL is after the redirect

Answer 1

based on http://jsfiddle.net/jfriend00/Zp4zG, this snippets works in Firefox 17.0:

alert(document.getElementById("testImage").baseURI)

It doesn't work in Chrome. Not tested anything else-