<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gbk" />
<title>回到顶部</title>
<style type="text/css">
html{
_overflow:hidden;
}
body{
_overflow:auto;
height:100%;
}
#div{
background:#ccc;
width:400px;
height:1500px;
text-align:center;
}
#returntop{
border:1px #ccc solid;
background:#F30;
width:80px;
height:30px;
position:fixed;
_position:absolute;
line-height:30px;
text-align:center;
top:0px;
left:0px;
display:none;
cursor:pointer;
}
a{
text-decoration:none;
}
</style>
</head>
<body>
<div id="div">这是顶部</div>
<div id="returntop">回顶部</div>
<script type="text/javascript">
var getDiv=document.getElementById(‘returntop‘);
getDiv.onclick=function(){
window.scrollTo(0,0);
}
window.onscroll=function(){
if(document.documentElement.scrollTop){
getDiv.style.display="block";
}else if(document.body.scrollTop){
getDiv.style.display="block";
}else{
getDiv.style.display="none";
}
}
function getWinSize(){
var winHeight=window.innerHeight,winWidth=window.innerWidth;
if(document.documentElement.clientHeight){
winHeight=document.documentElement.clientHeight;
winWidth=document.documentElement.clientWidth;
}else{
winHeight=document.body.clientHeight;
winWidth=document.body.clientWidth;
}
var height=winHeight-50;
var width=winWidth-100;
getDiv.style.top=height+"px";
getDiv.style.left=width+"px";
}
getWinSize();
window.onresize=getWinSize;
</script>
</body>
</html> <div style="text-align:center;margin:30px 0 0 0;"><hr style="color:#999;height:1px;">如不能显示效果，请按Ctrl+F5刷新本页，更多网页代码：<a href=‘http://www.veryhuo.com/‘ target=‘_blank‘>http://www.veryhuo.com/</a></div>
时间： 2024-10-01 08:51:43