keyboard switching

[debian mailing lists <debian@quin.macroware.cz>]

Hello
I need help with switching between keyboard maps in X Windows

I have version 4.1.0-16 of X in woody distribution on my x86 PC.
and I need to use cz qwerty and uk/us (=standard) keyboard map.
So I have wrote following to my /etc/X11/XF86Config-4:

Section "InputDevice"
        Identifier      "Generic Keyboard"
        Driver          "keyboard"
        Option          "CoreKeyboard"
        Option          "XkbRules"      "xfree86"
        Option          "XkbModel"      "pc102"
        Option          "XkbLayout"     "us"
        Option          "XkbVariant"    "cz_qwerty"
EndSection

but I don't know how to switch between these two keymaps and in fact
I don't know if this is good solution for my problem... and i don't 
know where i can find some info about these config variables :(

please, can you tell me how to do this ? I have looked for some
clue in debian lists archive but I wasn't satisfied.

thank you

Marek Cermak