Question

Does it go all the way to the back? Or does the window go to the back of the browser windows only? How does the functionality vary across browsers? I mean how far does it go back if you have a million other applications open with a million windows all over your desktop?

Answer 1

Other browsers don’t change their z-order when you call the blur() method on the window object. However, in Internet Explorer, the z-order is set to the lowest it can be – ie the window goes behind all other open, active windows, regardless of whether those windows are browser windows or other applications.

Note that Internet Explorer will not change the z-order of the window if there are other tabs open in the same window, so this feature is only really reliable for windows you open programmatically.