本文实例讲述了jQuery仿gmail实现fixed布局的方法。分享给大家供大家参考。具体实现方法如下：
<!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" />
<title>fixed bar demo</title>
<style type="text/css" media="screen">
body{
margin:0;
height:2000px;
}
#top{
background-color:#333;
height:80px;
}
#nav{
background-color:#999;
height:30px;
position:absolute;
top:80px;
width:100%;
}
</style>
<script src="jquery-1.6.2.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){
$(window).scroll(function(){
var scrollTop = $(window).scrollTop();
if(scrollTop < 80)
$("#nav").css('top', '80px');
else
$("#nav").css('top', scrollTop +'px');
});
});
</script>
</head>
<body>
<div id="top">
</div>
<div id="nav">
</div>
</body>
</html>
希望本文所述对大家的jQuery程序设计有所帮助。