twm and fvwm question

[Pascal A. Niklaus]

Hi all,

This is possibly a stupid question, but I could not figure out how to close 
windows in Cygwin-xfree/twm or /fvwm when there's no corresponding menu 
entry...

This problem occurs when I run Mozilla using Cygwin/XFree as remote X 
server, and browser windows without menu bar are opened by javascript code. 
Mozilla windows under W2K or Linux/KDE3 have the little close window icon 
in the top right.

Any help is greatly appreciated

Pascal