[NTG-context] Problem with \mainlanguage[fr] and javascript

Hello, The following code doesn't work with the fr option. It seems that there is interferences with javascript features. Any idea to solve this problem is welcome. Thank you in advance. \mainlanguage[fr] \setupinteraction[state=start] \definefield [Help] [check] [HelpSetup] [helpinfo] [helpinfo] \setupfields[reset] \setupfield[HelpSetup][option={readonly,hidden}] \definesymbol [helpinfo] [SomeHelpText] \starttext \fitfield[Help] \goto {Help} [JS(Toggle_Hide{Help})]. \stoptext -- Denis.