<script>

        // Connect a the web3 provider
        if (typeof web3 !== 'undefined') {
            web3 = new Web3(web3.currentProvider);
        } else {
            web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:7545"));
        }

        // Set a default account
        web3.eth.defaultAccount = web3.eth.accounts[0];

        // Get the contract address
        var RemixContract = web3.eth.contract('...');

        // Get the contract abi
        var myMessage = RemixContract.at('...');

        console.log(myMessage);

        $("#setMessageButton").click(function () {
    message = $("#userInput").val()
    myMessage.setMessage(message, (error, result) => {message = result});
    console.log($("#userInput").val())
});

    </script>