func: function startPhase(uint _phase, uint _currentPhaseRate, uint256 _startsAt, uint256 _endsAt) external onlyOwner {
  		require(_phase >= 0 && _phase <= 2);
  		require(_startsAt > endsAt && _endsAt > _startsAt);
  		require(_currentPhaseRate > 0);
  		currentPhase = CurrentPhase(_phase);
  		currentPhaseAddress = getPhaseAddress();
  		assert(currentPhaseAddress != 0x0);
  		currentPhaseRate = _currentPhaseRate;
  		if(currentPhase == CurrentPhase.Privatesale) ethMin = numToWei(10, decimals);
  		else {
  			ethMin = 0;
  			ethMax = numToWei(15, decimals);
  		}
  		startsAt = _startsAt;
  		endsAt = _endsAt;
  		TokenPhaseStarted(currentPhase, startsAt, endsAt);
  	}