function callByFun(address addr)returns (bool){
    bytes4 methodId = bytes4(keccak256("increaseAge(string,uint256)"));
    return addr.call(methodId,"jack", 1);
}

function callByFun(address addr)returns (bool){
    return addr.call(abi.encodeWithSignature("increaseAge(string,uint256)", "jack", 1));
}