function burn(uint256 _value, uint256 _confirmation) onlyOwner public returns (bool success) {
        require(_confirmation==7007);                 
        require(balanceOf[msg.sender] >= _value);   
        balanceOf[msg.sender] -= _value;            
        totalSupply -= _value;                      
        emit Burn(msg.sender, _value);
        return true;
    }