jquery实现简单的回到顶部

来源：互联网发布：mysql删除表数据编辑：程序博客网时间：2024/05/16 13:58

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="http://cdn.static.runoob.com/libs/jquery/1.10.2/jquery.min.js"></script>
<style>
.box1{
width:35px;
height:35px;
background-color: #00b3ee;
text-align: center;
line-height: 35px;
font-size: 36px;
font-weight: bold;
text-decoration: none;
display: block;
position: fixed;
bottom:30px;
right:30px;
display: none;
}
.box1:hover{
background-color: #00B83F;
}
</style>
</head>
<body>
<div style="background:#ff9900;height:100px;"></div>
<div style="background:#ccc;height:1200px;"></div>
<a href="javascript:(0);" class="box1">↑</a>

<script>
$(function(){
$(window).scroll(function(){
var t = $(this).scrollTop();
if(t>100){
$(".box1").fadeIn();
}else{
$(".box1").fadeOut();
}
});
$(".box1").on("click",function(){
$("body,html").animate({scrollTop:0},300);
});
})
</script>
</body>
</html>

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