圣杯布局

描述：两边的内容变化，中间的内容不变
代码：
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        *{
            padding: 0px;
            margin: 0px;
        }
        section{
            height:300px;
            padding-left: 100px;
            padding-right: 150px;
        }
        .content{
            width: 100%;
            height: 300px;
            background-color: red;
            float: left;
        }
        .left{
            width: 100px;
            height:300px;
            background-color: yellow;
            float: left;
            margin-left: -100%;
            position: relative;
            left: -100px;
        }
        .right{
            width: 150px;
            height: 300px;
            background-color: blue;
            float: left;
            margin-left: -150px;
            position: relative;
            left: 150px;
        }
    </style>
</head>
<body>
<section>
    <div class="content"></div>
    <div class="left"></div>
    <div class="right"></div>
</section>
</body>
</html>