Creating popups which grey out the background (opacity~40%)?

[aglaforge]

I'd like to have a popup window come up and then have the background
greyed out (still visible, but make it clear the focus is on the
popup). Has anyone been able to accomplish this with GWT?

An example of what I'm talking about (sans the cute animation... which
would also be nice to have...)

http://developer.yahoo.com/yui/examples/container/simpledialog.html

Any ideas?

Cheers...

[spontificus]

Play around with google spreadsheets - they have a really nice
background fadeout/modal dialog when trying to reconnect to the server.
Although I've only ever found it by coming back from prolonged standby,
so it's not the handiest example.

One could hope that this is encapsulatable enough to make it into GWT
at some point?

Richard