function is_ssn_check( ssn1, ssn2 )
{
        check_arr = new Array( 2, 3, 4, 5, 6, 7, 8, 9, 2, 3, 4, 5 )
        buff = new Array()

        ssn_len = 13
        ssn = ssn1 + ssn2

        for( i = 0; i < ssn_len; i++ )
        {
                buff[i] = ssn.substr( i, 1 )
        }

        for( i = sum = 0; i < 12; i++ )
        {
                sum += ( buff[i] *= check_arr[i] );
        }

        if( ( ( 11 - ( sum % 11 ) ) % 10 ) != buff[12] )
                return false

        return true
}

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