绝对定位 三列布局 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .main{position:relative;padding:0 210px;}
        .left{position:absolute;left:0;top:0;width:200px;height:500px;background-color:red}
        .right{position:absolute;right:0;top:0;width:200px;height:500px;background-color:red}
        .middle{height:500px;background-color:#000}
    </style>
</head>
<body>

<div class="main">
    <div class="left"></div>
    <div class="middle"></div>
    <div class="right"></div>
</div>

</body>
</html>
posted @ 2018-08-28 16:40  —只小白  阅读(203)  评论(0)  编辑  收藏  举报