done , wrong question. better to use this
contract ERC20 {
function transfer(address _recipient, uint256 _value) public returns (bool success);
}
contract Airdrop {
function drop(ERC20 token, address[] recipients, uint256[] values) public {
for (uint256 i = 0; i < recipients.length; i++) {
token.transfer(recipients[i], values[i]);
}
}
}