<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>固定广告</title>
<style>
*{
margin: 0;
padding:0;
}
.top {
height: 44px;
background:url(images/top.png) no-repeat top center;
position: fixed;
width: 100%;
/* 因为固定定位把元素转换为行内块元素,行内块元素的宽高与内容有关。 */
top: 0;
left: 0;
}
.box {
margin: 44px auto 0;
width: 1002px;
}
.ad-1,.ad-r {
position:fixed;
top:100px;
}
.ad-r {
right: 0;
}
</style>
</head>
<body>
<img src="images/ad-1.png" alt=""class="ad-1">
<img src="images/ad-r.png" alt="" class="ad-r">
<div class="top"></div>
<div class="box">
<img src="images/box.png" alt="">
</div>
</body>
</html>
效果图如下:

来源:https://www.cnblogs.com/fhtax/p/12219586.html