def findJavascriptInterpreter():
    for script in ['smjs', 'js']:
        _jsInterps = which(script)
        if _jsInterps:
            return _jsInterps[0]
    return None
Return a string path to a JavaScript interpreter if one can be found in
dataset/ETHPy150Open twisted/nevow/nevow/jsutil.py/findJavascriptInterpreter