What is window.eventReturnValue?

Question

I came across window.eventReturnValue on a couple of web pages today (see the second-to-last line of third yellow box in this example). It's not something I'd ever seen it before. What browsers use it?

EDIT: Thanks to Tim Down for pointing out that I was misreading a typo on the linked example.

Answer 1

None that I'm aware of. It could be a global variable used by a script on the page. On the page you linked to, that looks like a typo and should read window.event.returnValue.