... what exactly? There's no class comment to help out.

So far as I can work out it seems to be partially a proxy for working out if the image is running in a web browser (can we do that these days? I was under the impression that was no longer doable with current browsers) and partially a sort of shim for some network-file-fetching-putting that would be different if actually running in a browser.

If we can't do the browser thing we probably ought to clean out the related code. 

tim
--
tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
"bOtHeR" said Pooh, mistaking the LSD tablet for aspirin