Div floating layer scroll bar moves the position remains the same 4 methods summary
- 2020-03-30 00:49:36
- OfStack
Div at the top of the same, scroll bar scroll, div is still at the top! Directly upload the source code:
Method one:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<html xmlns="http://www.w3.org/1999/xhtml ">
<head>
<title>div Float layer, scroll bar move, keep the same position </title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
body{background-image:url(about:blank);background-attachment:fixed;}
#float{width:344px;height:34px;border:1px solid #C0DBF8;position:absolute;top:0px;}
</style>
</head>
<body>
<div id="float" >ddd</div>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
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</body>
<script type="text/javascript">
var IO=document.getElementById('float'),Y=IO,H=0,IE6;
IE6=window.ActiveXObject&&!window.XMLHttpRequest;
while(Y){H+=Y.offsetTop;Y=Y.offsetParent};
if(IE6)
IO.style.cssText="position:absolute;top:(this.fix?(document.documentElement.scrollTop-(this.javascript||"+H+")):0)";
window.onscroll=function (){
var d=document,s=Math.max(d.documentElement.scrollTop,document.body.scrollTop);
if(s>H&&IO.fix||s<=H&&!IO.fix)return;
if(!IE6)IO.style.position=IO.fix?"":"fixed";
IO.fix=!IO.fix;
};
try{document.execCommand("BackgroundImageCache",false,true)}catch(e){};
</script>
</html>
Method 2:
<STRONG><body topmargin="0" bottommargin="0" leftmargin="0" rightmargin="0" style="overflow: hidden;">
<!-- div</STRONG> To implement the <STRONG> -->
<div style="width: 100%; height: 100%; overflow: scroll;">
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<div style="border: 1px red solid; width: 300px; height: 300px;margin:-150px 0 0 -150px; position: absolute; left: 50%; top: 50%;"></STRONG>
In the layer
<STRONG> </div>
</body></STRONG>
Method 3:
<body topmargin="0" bottommargin="0" leftmargin="0" rightmargin="0" style="overflow: hidden;">
<!-- iframe To implement the -->
<iframe src="//www.jb51.net" width="100%" height="100%" frameborder="0"></iframe>
<div style="border: 1px red solid; width: 300px; height: 300px;margin:-150px 0 0 -150px; position: absolute; left: 50%; top: 50%;">
In the layer
</div>
</body>
Method 4: [center with CSS]
<style type="text/css">
<!--
html,body {height:100%; margin:0px; font-size:12px;}
.mydiv {
background-color: #f9fff6;
border: 1px solid #009900;
text-align: center;
line-height: 25px;
font-size: 13px;
font-weight: bold;
z-index:99;
width: 300px;
height: 50px;
left:50%;
top:50%;
margin-left:-150px!important;
margin-top:-60px!important;
margin-top:0px;
position:fixed!important;
position:absolute;
_top: expression(eval(document.compatMode &&
document.compatMode=='CSS1Compat') ?
documentElement.scrollTop + (document.documentElement.clientHeight-this.offsetHeight)/2 :
document.body.scrollTop + (document.body.clientHeight - this.clientHeight)/2);
}
-->
</style>
<script language="javascript" type="text/javascript">
function showDiv(){
document.getElementById('popDiv').style.display='block';
}
window.onload=function(){
showDiv();
}
</script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title> Always in the middle DIV ( support IE FF)</title>
</head>
<body>
<div id="popDiv" class="mydiv" style="display:none;"> Always in the middle <br/>
</div>
<br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/>
</body>
</html>