3个简单的页面布局示例

<style>
        header nav ul {
            margin: 15px;
            list-style: none;
            height: 50px;
        }
        header nav ul li {
            font-size: 1.5em;
            color: coral;
            margin: 10px;
            float: left;
        }
        header nav ul li a {
            text-decoration: none;
        }
        aside {
            margin-right: 50px;
            float: left;
            width: 200px;
        }
        aside ul {
            list-style: none;
        }
        article {
            float: left;
        }
        footer {
            font-family: Arial;
            clear: both;
            text-align: center;
        }
    </style>
<!--定义页眉-->
<header>
    <nav>
        <ul>
            <li><a href="#">主链接一</a></li>
            <li><a href="JavaScript:void (0)">主链接二</a></li>
            <li><a onclick="return false" href="index.html">主链接三</a></li>
        </ul>
    </nav>
</header>
<hr/>
<!--定义左边侧栏导航-->
<aside>
    <ul>
        <li>左侧导航栏链接1</li>
        <li>左侧导航栏链接2</li>
    </ul>
</aside>
<!--定义右边内容显示区-->
<article>
    <section>
        <h2>主题内容标题1</h2>
        <p>
            ......
        </p>
    </section>
    <section>
        <h2>主题内容标题2</h2>
        <p>
            .......
        </p>
    </section>
    <section>
        <h2>主题内容标题3</h2>
        <p>
            .......
        </p>
    </section>
</article>
<!--定义页脚-->
<footer>
    <hr/>
    <!--footer的样式设置为clear:both,以便使其始终居于底部，并占满整行。-->
    &copy;Jener_Yan <span id="DateSpan"></span>
</footer>
<script>
    /*获取当前年份*/
    var d = document.getElementById("DateSpan");
    var NowYear = new Date();
    d.innerHTML = NowYear.getFullYear();
</script>

<style>
        body {
            text-align: center;
        }
        div {
            display: inline-block;
            min-height: 200px;
            padding: 5px;
            margin: 0;
        }
        header, footer {
            background-color: aquamarine;
            padding: 5px;
            margin: 5px;
        }
        main {
            width: 100%;
            margin: 0;
        }
        #main-l {
            background-color: chartreuse;
            width: 20%;
        }
        #main-m {
            background-color: bisque;
            width: 50%;
            /*此处的宽度占比不取60%是因为，还得留些空间给内边距（Padding）和外边距（Margin）*/
        }
        #main-r {
            background-color: coral;
            width: 20%;
        }
    </style>
<h2>inline block布局</h2>
<header>
    header
</header>
<main>
    <div id="main-l">左侧栏宽 20%</div>
    <div id="main-m">中部栏宽 50%</div>
    <div id="main-r">右侧栏宽 20%</div>
</main>
<footer>&copy;Jener_Yan &nbsp;<span id="DateSpan"></span></footer>
<script>
    /*获取当前年份*/
    var d = document.getElementById("DateSpan");
    var NowYear = new Date();
    d.innerHTML = NowYear.getFullYear();
</script>

<style>
        /*全局设置*/
        div {
            min-height: 100px;
            margin: 0 auto;
            padding: 6px;
        }
        header, footer {
            padding: 3px;
            background-color: darkgray;
            margin: 4px 0;
            width: 100%;
        }
        .container {
            text-align: center;
        }
        .content {
            display: table;
            /*将div转化为表格模式显示*/
            width: 100%;
        }
        /*上部三个栏目*/
        .upContent {
            display: table-row;
            /*将div转换为行显示*/
        }
        .upContentL {
            background-color: #fffefe;
            width: 20%;
            display: table-cell;
            /*将div转化为单元格显示*/
        }
        .upContentM {
            background-color: aqua;
            width: 60%;
            display: table-cell;
        }
        .upContentR {
            display: table-cell;
            background-color: skyblue;
            width: 20%;
        }
        /*下部两个栏目*/
        .downContent {
            display: table-row;
            width: 100%;
        }
        .downContentL {
            background-color: aquamarine;
            display: table-cell;
            width: 30%;
        }
        .downContentR {
            background-color: lightcyan;
            width: 70%;
            display: table-cell;
        }
    </style>
<div class="container">
    <h2>
        CSS表格式布局
    </h2>
    <header>
        header
    </header>
    <div class="content">
        <div class="upContent">
            <div class="upContentL">上部左栏 20%</div>
            <div class="upContentM">上部中栏 60%</div>
            <div class="upContentR">上部右栏 20%</div>
        </div>
    </div>
    <div class="content">
        <div class="downContent">
            <div class="downContentL">下部左栏 20%</div>
            <div class="downContentR">下部右栏 80%</div>
        </div>
    </div>
    <footer>&copy;Jener_Yan &nbsp;<span id="DateSpan"></span></footer>
</div>
<script>
    var date = new Date();
    document.getElementById("DateSpan").innerHTML = date.getFullYear();
</script>