话不多说，请看代码：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery实现页面滚动时层智能浮动定位_前端开发</title>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
body {
font: 12px/1.8 Arial;
color: #666;
}
h1.tit-h1 {
font-size: 38px;
text-align: center;
margin: 30px 0 15px;
color: #f60;
}
.wrap {
border: 1px dashed #ccc;
background: #f8f8f8;
padding: 20px;
}
.demo {
height: 1500px;
}
.float {
width: 80px;
padding: 10px;
border: 1px solid #ffecb0;
background-color: #fffee0;
-moz-box-shadow: 1px 1px 2px rgba(0,0,0,.2);
-webkit-box-shadow: 1px 1px 2px rgba(0,0,0,.2);
box-shadow: 1px 1px 2px rgba(0,0,0,.2);
position: absolute;
right: 10%;
top: 131px;
}
</style>
<script type="text/javascript" src="../..content/js/jquery-1.4.4.min.js"></script>
</head>
<body>
<h1 class="tit-h1">jQuery实现页面滚动时层智能浮动定位_前端开发</h1>
<div class="wrap">
<div class="demo"></div>
<div class="float" id="float">我在这里等你噢！</div>
</div>
<script type="text/javascript">
$.fn.smartFloat = function () {
var position = function (element) {
var top = element.position().top, pos = element.css("position");
$(window).scroll(function () {
var scrolls = $(this).scrollTop();
if (scrolls > top) {
if (window.XMLHttpRequest) {
element.css({
position: "fixed",
top: 0
});
} else {
element.css({
top: scrolls
});
}
} else {
element.css({
position: pos,
top: top
});
}
});
};
return $(this).each(function () {
position($(this));
});
};
//绑定
$("#float").smartFloat();
</script>
</div>
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-20541395-2']);
_gaq.push(['_trackPageview']);
(function () {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0];
s.parentNode.insertBefore(ga, s);
})();
</script>
</body>
</html>
以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持脚本之家！
