<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="jquery-1.7.1.min.js"></script>
<style type="text/css">
body {
font-size:12px;
}
#scroll {
position:fixed; top:300px; right:100px;
}
.scrollItem {
width:20px; height:70px;border:#e1e1e1 1px solid; cursor:pointer; text-align:center; padding-top:10px;
}
</style>
<script type="text/javascript">
$(function () {
var speed = 1000;//滚动速度
//回到顶部
$("#toTop").click(function () {
$("body").animate({ "scrollTop": 0 }, speed);
});
//回到底部
var windowHeight = parseInt($("body").css("height"));//整个页面的高度
$("#toBottom").click(function () {
$("body").animate({ "scrollTop": windowHeight }, speed);
});
});
</script>
</head>
<body>
<div ></div>
<p id="liuyan">这里是留言位置，回到这儿来额</p>
<div ></div>
<div id="scroll">
<div class="scrollItem" id="toTop">回到顶部</div>
<div class="scrollItem" id="toBottom">回到顶部</div>
</div>
</body>
</html>
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