div浮层，滚动条移动，保持位置不变的4种方法

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div浮层，滚动条移动，保持位置不变的4种方法
div浮层，滚动条移动，保持位置不变的4种方法
div在顶部不变、滚动条滚动，div还是在顶部！

直接上传源码了：

方法一：

[html] view plain copy print ?

<!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浮层，滚动条移动，保持位置不变</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{344px;height:34px;border:1px solid #C0DBF8;position:absolute;top:0px;}

</style>

</head>

<body>

<div id="float" >ddd</div>

 

 

 

 

 

 

</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>

<!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浮层，滚动条移动，保持位置不变</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{344px;height:34px;border:1px solid #C0DBF8;position:absolute;top:0px;} </style> </head> <body> <div id="float" >ddd</div> </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>

方法二：

[html] view plain copy print ?

<body topmargin="0" bottommargin="0" leftmargin="0" rightmargin="0" style="overflow: hidden;">



<div style=" 100%; height: 100%; overflow: scroll;">

 

 

 

 

</div>

<div style="border: 1px red solid; 300px; height: 300px;margin:-150px 0 0 -150px; position: absolute; left: 50%; top: 50%;">

 居中的层

 </div>

</body>

<body topmargin="0" bottommargin="0" leftmargin="0" rightmargin="0" style="overflow: hidden;">  <div style=" 100%; height: 100%; overflow: scroll;"> </div> <div style="border: 1px red solid; 300px; height: 300px;margin:-150px 0 0 -150px; position: absolute; left: 50%; top: 50%;"> 居中的层 </div> </body>

方法三：

[html] view plain copy print ?

<body topmargin="0" bottommargin="0" leftmargin="0" rightmargin="0" style="overflow: hidden;">



<iframe src="http://www.csdn.net/" width="100%" height="100%" frameborder="0"></iframe>

<div style="border: 1px red solid; 300px; height: 300px;margin:-150px 0 0 -150px; position: absolute; left: 50%; top: 50%;">

居中的层

</div>

</body>

<body topmargin="0" bottommargin="0" leftmargin="0" rightmargin="0" style="overflow: hidden;">  <iframe src="http://www.csdn.net/" width="100%" height="100%" frameborder="0"></iframe> <div style="border: 1px red solid; 300px; height: 300px;margin:-150px 0 0 -150px; position: absolute; left: 50%; top: 50%;"> 居中的层 </div> </body>

方法四：[采用css来居中]

[html] view plain copy print ?

<style type="text/css">



</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>始终在中间DIV (支持IE FF)</title>



</head>



<body>

<div id="popDiv" class="mydiv" style="display:none;">始终在中间 

</div>

 

</body>

</html>

<style type="text/css">  </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>始终在中间DIV (支持IE FF)</title> </head> <body> <div id="popDiv" class="mydiv" style="display:none;">始终在中间 </div> </body> </html>
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原文地址：https://www.cnblogs.com/firstdream/p/4475691.html