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<!doctype>
<html>
    <head>
    <script type="text/javascript" src="js/bignumber.js/bignumber.min.js"></script>
    <script type="text/javascript" src="../dist/ethereum.js"></script>
    <script type="text/javascript">
        var web3 = require('web3');
        web3.setProvider(new web3.providers.HttpSyncProvider('http://localhost:8080'));

        var desc = [{
            "type":"event",
            "inputs": [{"name":"a","type":"uint256","indexed":true},{"name":"b","type":"hash256","indexed":false}],
            "name":"Event"
        }, {
            "type":"event",
            "inputs": [{"name":"a","type":"uint256","indexed":true},{"name":"b","type":"hash256","indexed":false}],
            "name":"Event2"
        }, {
            "type":"function",
            "inputs": [{"name":"a","type":"uint256"}],
            "name":"foo",
            "outputs": []
        }];

        var address = '0x01';

        var contract = web3.eth.contract(address, desc); 

        function test1() {
            web3.eth.watch(contract).changed(function (res) {
                
            });
        };

        function test2() {
            web3.eth.watch(contract.Event).changed(function (res) {
                
            });
        };

        function test3() {
            contract.Event().changed(function (res) {
                
            });
        };

        // not valid
        // function test4() {
        //    web3.eth.watch([contract.Event, contract.Event2]).changed(function (res) {
        //    });
        // };

    </script>
    </head>

    <body>
        <div>
            <button type="button" onClick="test1();">test1</button>
        </div>
        <div>
            <button type="button" onClick="test2();">test2</button>
        </div>
        <div>
            <button type="button" onClick="test3();">test3</button>
        </div>
    </body>
</html>