:Description: Convert python value to executable javascript value by type.
        :param value: Value to transform.
        :type value: None, bool, int, float, string
        :return: string

def __type2js(cls, value):
        """
        :Description: Convert python value to executable javascript value by type.
        :param value: Value to transform.
        :type value: None, bool, int, float, string
        :return: string
        """
        if value is None:
            return 'null'
        elif isinstance(value, bool):
            return 'false' if not value else 'true'
        elif isinstance(value, (int, float)):
            return '%s' % value
        elif isinstance(value, dict):
            return json.dumps(dict)
        return '"%s"' % value