function delProposal(uint _propID) internal {
    uint k = 0;
    while (k < ActiveProposals.length){
      if (ActiveProposals[k].propID == _propID) {
        require(ActiveProposals[k].endTime < now);
        ActiveProposals[k] = ActiveProposals[ActiveProposals.length-1];
        ActiveProposals.length = ActiveProposals.length-1;   
      } else {
        k++;
      }
    }    
  }