human
Complete the below
def _toCSSname(DOMname):

    ''''Return CSSname for given DOMname e.g. for DOMname \'fontStyle\' returns
    \'font-style\'.'
    '''
 ... Write me a the Python program you requested?
assistant
#Here is the Python program you requested.
    def _doDOMtoCSSname2(m):
        return ('-' + m.group(0).lower())
    return _reDOMtoCSSname.sub(_doDOMtoCSSname2, DOMname)