contract ERC20Token is StandardToken {
function () {
 //if ether is sent to this address, send it back.
 throw;
 }
/* Public variables of the token */
 string public name = "Rainbow Token"; //Name of the token
 uint8 public decimals = 18; //How many decimals to show. ie. There could 1000 base units with 3 decimals
 string public symbol ="RNBO"; //An identifier: eg AXM
 string public version = "H1.1"; //human 0.1 standard. Just an arbitrary versioning scheme.
//
// CHANGE THE FOLLOWING VALUES FOR YOUR TOKEN!
//
//make sure this function name matches the contract name above. So if you’re token is called TutorialToken, make sure the //contract name above is also TutorialToken instead of ERC20Token
function ERC20Token(
 ) {
 balances[msg.sender] = 450000000000000000000000000000000; // Give the creator all initial tokens (100000 for example)
 totalSupply = 900000000000000000000000000000000; // Update total supply (100000 for example)
 name = "Rainbow Token"; // Set the name for display purposes
 decimals = 18; // Amount of decimals
 symbol = "RNBO"; // Set the symbol for display purposes
 }
/* Approves and then calls the receiving contract */
 function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
 allowed[msg.sender][_spender] = _value;
 Approval(msg.sender, _spender, _value);
//call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn’t have to include a contract in here just for this.
 //receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
 //it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
 if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }
 return true;
 }
}
function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
/call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn’t have to include a contract in here just for this.
//receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
//it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }
return true;
}

/* Approves and then calls the receiving contract */