Preventing xterm from closing

Hi everyone.

I'm using the newest version of xterm and icewm window manager on Debian GNU/Linux. I have set up multiple workspaces and xterm is normally open on workspace number 1. My problem is that whenever I want to terminate some programs on other workspaces I keep closing xterm accidentally with the Alt + F4 keyboard shortcut. Is there any way to "lock" xterm, to prevent it from closing or to get it to ask me for confirmation before closing? If possible please do not sugest using any defferent window managers / terminals, I'd like stick to the ones I prefer. :-)

Any help will be greatly apperciated!

>>8
Ok.
First : xterm is old, there are other terms that are as light as xterm, like mrxvt or urxvt if you use unicode but has more features.
- Search in icewm documentation (I don't know this wm), since it's the one that manage you windows (o rly?) see if it implements this feature or not.
- type & after your program name, so when you close xterm, it's still running and you can go in it again
- and/or use screen.