Edit in JSFiddle

Result
HTML
JavaScript

<body>
    <div>This is div.</div>
    <p>This is paragraph.</p>
    <span>This is span.</span><br/><br />
    <button id="myButton" >Click ME</button>
    <button onclick="location.reload()">Reset</button>
    </body>

$(document).ready(function () {
            $("#myButton").click(function () {
                $("*").css({ 'font-family': 'comic sans ms', 'background-color': 'Yellow' });
            });
        });