function Crowdsale(uint256 _rate, address _wallet, SancojTokenContract _token, address _tokenWallet, address _owner) public {
    require(_rate > 0);
    require(_wallet != address(0));
    require(_token != address(0));
    require(_tokenWallet != address(0));

    rate = _rate;
    wallet = _wallet;
    token = _token;
    tokenWallet = _tokenWallet;
    owner = _owner;
  }