<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "https://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>fixed定位</title>
<style type="text/css">
* {margin:0; padding:0; border:0;}
#wrapper {width:1000px; height:2000px; margin: 0 auto;}
#div1 {height:100px; background-color:red;}
#div21 {width:100px; height:200px; background-color:blue; padding:10px; border:5px solid black;}
#div22 {width:50px; height:100px; background-color:#0F0; position:static; float:right;}
</style>
<script>
window.onscroll = function () {
var scrollTop = document.documentElement.scrollTop;
if(scrollTop > 115){
document.getElementById("div22").style.position = "fixed";
}
else {
document.getElementById("div22").style.position = "static";
}
}
</script>
</head>
<body>
<div id="wrapper">
<div id="div1"></div>
<div id="div21">
<div id="div22"></div>
</div>
</div>
</body>
</html><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Tr
阅读背景：
元素position设置为fixed而未指定top、bottom、left、right时的定位
来源：互联网
分享到：
