Read JSON with jQuery (html file)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8" />
    <title>JSON Sample</title>
</head>
<body>
    <div id="placeholder"></div>
    <script src="http://code.jquery.com/jquery-1.7.1.min.js"></script>
    <script>
        // get file 'data.json' where http://pastebin.com/GjTGiFRy
        $.getJSON('data.json', function(data) {
            var output="<ul>";
            for (var i in data.users) {
                output+="<li>" + data.users[i].firstName + " " + data.users[i].lastName + "–" + data.users[i].joined.month+"</li>";
            }
            output+="</ul>";
            document.getElementById("placeholder").innerHTML=output;
        });
    </script>
</body>
</html>