如何使用css为当前div的标记设置样式？

My div:

我的div：

 <div id="dialog" class="window">
        <table class="modalWindow" border="1">
            <tr>
                <td colspan="2"><input type="text" id="feedName" value="" /></td>
            </tr>
            <tr>
                <td><input type="submit" id="renameFeed" value="Submit"></td>
                <td><a href="/go.html?url=#" class="close">Close it</a></td>
            </tr>
        </table>
    </div>
 <div id="dialog" class="win