Edit in JSFiddle

textarea.log {
    width: 70%;
    height: 300px;
    padding: 5px;
}
div.feedback {
    color: red;
    font-size: 0.5em;
    margin-top:-20px;
}
div.example {
    border: 2px solid #FF0000;
    margin-top: 20px;
    padding: 20px;
}
input {
    box-sizing: border-box;
    width: 276px;
    padding: 5px 7px;
    margin: 0;
    outline: 0;
    font-size: 1.1em;
    background: #fff;
    border: #e3e1d5 1px solid;
    border-radius: 2px;
    transition: all 0.15s ease-in-out;
}
table {
    margin: 1.6em 0;
    box-sizing: border-box;
    width: 100%;
    max-width: 100%;
    background-color: transparent;
}
tbody {
    display: table-row-group;
    vertical-align: middle;
    border-color: inherit;
}
table th, table td {
    padding: 8px;
    line-height: 20px;
    text-align: left;
    vertical-align: middle;
    border-top: 1px solid #edece4
}

<table>
    <tbody>
        <tr>
            <td>
                <input id="callbacks" type="text" value="Click me." />
            </td>
        </tr>
    </tbody>
</table>
<textarea id="callbacks-log" class="log">DatePicker Event Log:</textarea>

$("#callbacks").datepicker({
    beforeShow: function () {
        $("#callbacks").val("");
        var box = $("#callbacks-log");
        box.val(box.val() + '\nbeforeShow');
    },
    beforeShowDay: function () {
        var box = $("#callbacks-log");
        box.val(box.val() + '\nbeforeShowDay');
        return [true, "", ""];
    },
    onChangeMonthYear: function () {
        var box = $("#callbacks-log");
        box.val(box.val() + '\nonChangeMonthYear');
    },
    onClose: function () {
        var box = $("#callbacks-log");
        box.val(box.val() + '\nonClose');
    },
    onSelect: function () {
        var box = $("#callbacks-log");
        box.val(box.val() + '\nonSelect');
    }
});