css实现网页固定位置的浮动的代码

2016-06-26 网页编程网 网页编程网

<!DOCTYPE HTML><html><head><meta charset="utf-8"><title>position: fixed</title>
<style type="text/css">
* {
padding: 0;
margin: 0;
}
#content {
height: 5000px;
width: 50%;
border-right: 10px dotted red;
}
#demo_t, #demo_b, #demo_l, #demo_r {
background: #f90;
position: fixed;
}
#demo_t, #demo_b {
left: 0;
width: 100%;
}
#demo_l, #demo_r {
width: 50px;
top: 300px;
}
#demo_t {
top: 0;
}
#demo_b {
bottom: 0;
}
#demo_l {
left: 0;
}
#demo_r {
right: 0;
}
</style>

</head>
<body>
<div id="demo_t">此处显示  id "demo" 的内容</div>
<div id="demo_b">此处显示  id "demo" 的内容</div>
<div id="demo_l">此处显示  id "demo" 的内容</div>
<div id="demo_r">此处显示  id "demo" 的内容</div>
<div id="content"></div>
</body></html>

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