Not working under Mozilla Firefox 1.5.0.2

Not working under Mozilla Firefox 1.5.0.2

Mozilla/5.0 (Windows; U; Win 9x 4.90; es-AR;
rv:1.8.0.2) Gecko/20060308 Firefox/1.5.0.2

In the demo I can't write in the user or password textbox.

The JavaScript Console say:
Error: Error in parsing value for property 'cursor'.
Declaration dropped.
Archivo Fuente: http://webwm.sourceforge.net/
Línea: 0

Error: Error in parsing value for property 'width'.
Declaration dropped.
Archivo Fuente: http://webwm.sourceforge.net/
Línea: 0

Error: Error in parsing value for property 'height'.
Declaration dropped.
Archivo Fuente: http://webwm.sourceforge.net/
Línea: 0

Error: box has no properties
Archivo Fuente:
http://webwm.sourceforge.net/WM_includes/TObject.js
Línea: 385

I omitted the repeated ones