广告对联：当scroll滚动到一定的距离左右两边会出现广告
代码如下
<html>
<head>
<title></title>
</head>
<style>
*{
margin:0;
padding:0;
}
.left{
width:100px;
height:300px;
background:red;
float:left;
position:fixed;
left:0;
top:200px;
display:none;
}
.right{
width:100px;
height:300px;
background:red;
float:right;
position:fixed;
right:0;
top:200px;
display:none;
}
</style>
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script>
$(function(){
$(window).scroll(function(){ //scroll滚动函数，当滚动时触发
var scrollHeight=$(‘body‘).scrollTop()+$(‘html‘).scrollTop() //获取滚动距离
if(scrollHeight>200){ //当滚动大于200，把左右两边的div给显示出来
$(‘div‘).show(1000)
}else{
$(‘div‘).hide(1000)
}
})
})
</script>
<body>
<div class="left"></div>
<div class="right"></div>
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</body>
</html>
效果图
原文：https://www.cnblogs.com/superCwen/p/9951526.html