顶端由Javascript生成:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8"></meta>
<title>自动固定顶部的悬浮菜单栏代码</title>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
ul,li {
list-style: none;
}
#content {
width: 600px;
margin: 0 auto;
border: 1px solid #f00;
}
ul li.item {
width: 400px;
text-align: center;
margin: 20px 100px;
background: #7CCD7C;
color: #fff;
font-size: 14px;
font-weight: bold;
height: 100px;
line-height: 100px;
}
</style>
</head>
<body>
<ul id="content">
<li class="item">第一块内容</li>
<li class="item">第二块内容</li>
<li class="item">第三块内容</li>
<li class="item">第四块内容</li>
<li class="item">第五块内容</li>
<li class="item">第六块内容</li>
<li class="item">第七块内容</li>
<li class="item">第八块内容</li>
<li class="item">第九块内容</li>
<li class="item">第十块内容</li>
</ul>
<script language="javascript">
document.write("<div id=\"float_banner\" style=\"position: absolute;top: 0;left: 0;width: 100%; margin-left: 0; height: 30px;line-height: 30px;text-align: center;background: #E3E3E3;color: #CD0000;font-size: 14px;font-weight: bold;z-index: 2;\">广告位招租啦~</div>");
var speed = 80;
var scrollTop = null;
var hold = 0;
var float_banner;
var pos = null;
var timer = null;
var moveHeight = null;
float_banner = document.getElementById("float_banner");
window.onscroll = scroll_ad;
function scroll_ad() {
scrollTop = document.documentElement.scrollTop + document.body.scrollTop;
pos = scrollTop - float_banner.offsetTop;
pos = pos / 10 ;
moveHeight = pos > 0 ? Math.ceil(pos) : Math.floor(pos);
if (moveHeight != 0) {
float_banner.style.top = float_banner.offsetTop + moveHeight + "px";
setTimeout(scroll_ad, speed);
}
}
</script>
</body>
</html>顶端由CSS生成:
<pre name="code" class="html"><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>自动固定顶部的悬浮菜单栏代码</title>
<meta http-equiv="content-type" content="text/html;charset=utf-8"></meta>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
ul,li {
list-style: none;
}
#content {
width: 600px;
margin: 0 auto;
border: 1px solid #f00;
}
ul li.item {
width: 400px;
text-align: center;
margin: 20px 100px;
background: #48D1CC;
color: #fff;
font-size: 14px;
font-weight: bold;
height: 100px;
line-height: 100px;
}
#float_banner {
position: absolute;
top: 0;
left: 0;
width: 100%;
margin-left: 0;
height: 30px;
line-height: 30px;
text-align: center;
background: #E3E3E3;
color: #00f;
font-size: 14px;
font-weight: bold;
z-index: 2;
}
</style>
</head>
<body>
<div id="float_banner">这里是顶部的横幅,随着页面转动而浮动</div>
<ul id="content">
<li class="item">第一块内容</li>
<li class="item">第二块内容</li>
<li class="item">第三块内容</li>
<li class="item">第四块内容</li>
<li class="item">第五块内容</li>
<li class="item">第六块内容</li>
<li class="item">第七块内容</li>
<li class="item">第八块内容</li>
<li class="item">第九块内容</li>
<li class="item">第十块内容</li>
</ul>
<script language="javascript">
var speed = 80;
var scrollTop = null;
var hold = 0;
var float_banner;
var pos = null;
var timer = null;
var moveHeight = null;
float_banner = document.getElementById("float_banner");
window.onscroll = scroll_ad;
function scroll_ad() {
scrollTop = document.documentElement.scrollTop + document.body.scrollTop;
pos = scrollTop - float_banner.offsetTop;
pos = pos / 10 ;
moveHeight = pos > 0 ? Math.ceil(pos) : Math.floor(pos);
if (moveHeight != 0) {
float_banner.style.top = float_banner.offsetTop + moveHeight + "px";
setTimeout(scroll_ad, speed);
}
}
</script>
</body>
</html>
CSS特效 - 不用JS也能让工具栏悬浮于网页顶部(兼容所有浏览器):
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8"></meta>
<title>CSS特效 - 不用JS也能让工具栏悬浮于网页顶部(兼容所有浏览器)</title>
<style type="text/css">
.float_banner {
position:fixed !important;
top:0px;
left: 50%;
margin-left:-468px;
position:absolute;
top:expression(offsetParent.scrollTop+0);
text-align: center;
border: 1px solid #dddddd;
border-top: none;
background: #ffffff;
width:934px;
height:20px
}
</style>
</head>
<body>
<DIV class="float_banner">
不用JS也能让工具栏悬浮于网页顶部(兼容所有浏览器)
</DIV>
<DIV style="text-align: center;">
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</DIV>
</body>
本文介绍两种实现顶部悬浮菜单栏的方法,一种使用JavaScript平滑滚动效果,另一种仅依靠CSS实现跨浏览器兼容的固定顶部布局。
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