图片
回到顶部1
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
body{
height: 4000px;
}
#btn{
width: 40px;
height: 40px;
position: absolute;
cursor: pointer;
background: url(top_bg.png);
}
#btn:hover{
background-position: 0 -40px;
}
</style>
<script type="text/javascript" src="move.js"></script>
<script type="text/javascript">
window.onload=function(){
var oBtn=document.getElementById(‘btn‘);
var screenw=document.documentElement.clientWidth||document.body.clientWidth;
var screenh=document.documentElement.clientHeight||document.body.clientHeight;
oBtn.style.left=screenw-oBtn.offsetWidth+‘px‘;
oBtn.style.top=screenh-oBtn.offsetHeight+‘px‘;
window.onscroll=function(){
var scrolltop=document.documentElement.scrollTop||document.body.scrollTop;
oBtn.style.top=scrolltop+screenh-oBtn.offsetHeight+‘px‘;
}
oBtn.onclick=function(){
document.documentElement.scrollTop=document.body.scrollTop=0;
}
}
</script>
</head>
<body>
<div id="btn"></div>
</body>
</html>
回到顶部2
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
body{
height: 4000px;
}
#btn{
width: 40px;
height: 40px;
position: fixed;
bottom: 0;
right: 0;
cursor: pointer;
background: url(top_bg.png);
display: none;
}
#btn:hover{
background-position: 0 -40px;
}
</style>
<script type="text/javascript">
window.onload=function(){
var oBtn=document.getElementById(‘btn‘);
var screenh=document.documentElement.clientHeight||document.body.clientHeight;
var timer=null;
var istop=null;
window.onscroll=function(){
var scrolltop=document.documentElement.scrollTop||document.body.scrollTop;
if(scrolltop>=screenh){
oBtn.style.display=‘block‘;
}else{
oBtn.style.display=‘none‘;
}
if(istop){
clearInterval(timer);
}
istop=true;
}
oBtn.onclick=function(){
timer=setInterval(function(){
var scrolltop=document.documentElement.scrollTop||document.body.scrollTop;
var ispeed=Math.ceil(scrolltop/5);
document.documentElement.scrollTop=document.body.scrollTop=scrolltop-ispeed;
istop=false;
if(scrolltop==0){
clearInterval(timer);
}
},30);
}
}
</script>
</head>
<body>
<div id="btn"></div>
</body>
</html>
回到顶部3
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
body{
height: 4000px;
}
#btn{
width: 40px;
height: 40px;
position: fixed;
bottom: 0;
right: 0;
cursor: pointer;
background: url(top_bg.png);
display: none;
}
#btn:hover{
background-position: 0 -40px;
}
</style>
<script src="http://apps.bdimg.com/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$(window).scroll(function(){
if($(window).scrollTop()>100){
$(‘#btn‘).fadeIn(1000);
}else{
$(‘#btn‘).fadeOut(1000);
}
})
$(‘#btn‘).click(function(){
$(‘body,html‘).animate({scrollTop:0}, 1000);
return false;
})
});
</script>
</head>
<body>
<div id="btn"></div>
</body>
</html>
时间： 2024-12-21 15:58:08