function freezeCheck(address _from, uint256 _value)  returns (bool) {
    uint forbiddenPremine =  launch_date - block.timestamp + total_freeze_term;

    if (forbiddenPremine > 0) {
      require(balances[_from] >= _value.add( frozenAccount[_from] * forbiddenPremine / total_freeze_term) );
    }

    return true;
  }