Open fxKeyboard with numberpad

[jabisgmbh]

Hi,
I am working with fxKeyboard in kioskmode on Iceweasel/Webconverger installation.
This addon is very helpful. Great work.
I would like to have the fxKeyboard open in number mode for number input and in default text mode for text fields.
How to do with java script ?
I tried to switch the mode with "fxKeyboard.switchAltKeys()" but this won't work.

[w-A-L-L-e]

<input type="number" name="ticket"/> works 

This sets the keyboard to numbers when focus'ing.
Unfortunately it has the bug of switching back to letters after the first digit is entered :(