eth.syncing

window.addEventListener('load', function () {
        if (typeof web3 !== 'undefined') {
            console.log('Web3 Detected! ' + web3.currentProvider.constructor.name)
            window.web3 = new Web3(web3.currentProvider);
        } else {
            console.log('No Web3 Detected... using HTTP Provider')
            window.web3 = new Web3(new Web3.providers.HttpProvider("https://mainnet.infura.io/noapikey"));
        }
    })
    function getBalance() {
        var address, wei, balance
        address = document.getElementById("address").value
        try {
            web3.eth.getBalance(address, function (error, wei) {
                if (!error) {
                    var balance = web3.fromWei(wei, 'ether');
                    document.getElementById("output").innerHTML = balance + " ETH";
                }
            });
        } catch (err) {
            document.getElementById("output").innerHTML = err;
        }
    }