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<!doctype>
<html>
<head>
<title>Hello world</title>
<script src="../ext/bignumber.min.js"></script>
<script src="../ext/ethereum.js/dist/ethereum.js"></script>
<script>
    var web3 = require('web3');
    web3.setProvider(new web3.providers.HttpSyncProvider('http://localhost:8080'));
    var eth = web3.eth;
    var desc =  [{
        "name": "multiply(uint256)",
        "inputs": [{
            "name": "a",
            "type": "uint256"
        }],
        "outputs": [{
            "name": "d",
            "type": "uint256"
        }]
    }];
    var address = web3.eth.transact({
        data: "0x603880600c6000396000f3006001600060e060020a600035048063c6888fa114601857005b6021600435602b565b8060005260206000f35b600081600702905091905056",
        gasprice: "1000000000000000",
        gas: "10000",
    });
    var contract = web3.eth.contract(address, desc);

    function calculate() {
        var param = parseInt(document.getElementById('value').value);

        var res = contract.call().multiply(param);
        document.getElementById('result').innerText = res.toString(10);
    }
</script>
</head>
<body>
<h3>Contract content</h3>
<textarea style="height:100px; width: 300px;" disabled="disabled">
contract test {
    function multiply(uint a) returns(uint d) {
        return a * 7;
    }
}
</textarea>
<code><pre>
603880600c6000396000f3006001600060e060020a600035048063c6888fa1140
05b6021600435602b565b8060005260206000f35b600081600702905091905056</pre></code>

<hr>
<div>7 x <input type="number" id="value" onkeyup='calculate()'></input> = 
<span id="result"></spa>

</body>
</html>