gistfile1.txt

contract token {                                                                                                                                                                         
    mapping (address => uint) balances;                                                                                                                                                  
                                                                                                                                                                                         
    // Initializes contract with 10 000 tokens to the creator of the contract                                                                                                            
    function token() {                                                                                                                                                                   
        balances[msg.sender] = 10000;                                                                                                                                                    
    }                                                                                                                                                                                    
    // Very simple trade function                                                                                                                                                        
    function sendToken(address receiver, uint amount) returns(bool sufficient) {                                                                                                         
        if (balances[msg.sender] < amount) return false;                                                                                                                                 
        balances[msg.sender] -= amount;                                                                                                                                                  
        balances[receiver] += amount;                                                                                                                                                    
        return true;                                                                                                                                                                     
    }                                                                                                                                                                                    
                                                                                                                                                                                         
    // Check balances of any account                                                                                                                                                     
    function getBalance(address account) returns(uint balance){                                                                                                                          
        return balances[account];                                                                                                                                                        
    }                                                                                                                                                                                    
                                                                                                                                                                                         
}       

gistfile2.txt

var abi = [ { "constant" : false, "inputs" : [ { "name" : "receiver", "type" : "address" }, { "name" : "amount", "type" : "uint256" } ], "name" : "sendToken", "outputs" : [ { "name" : "sufficient", "type" : "bool" } ], "type" : "function" }, { "constant" : false, "inputs" : [ { "name" : "account", "type" : "address" } ], "name" : "getBalance", "outputs" : [ { "name" : "balance", "type" : "uint256" } ], "type" : "function" } ] 

var contract = eth.contract(abi);
var instance = new contract('0xe7810c04a378e82ca42f125ccef2dc4b279a7bca');