<!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=utf-8" />
<title>HTML pure CSS floating window compatible with IE6+</title>
<style>
/* body container settings */
body {
/* In IE6, you need to add the following two style attributes to the body to perfectly achieve fixed floating*/
_background-attachment: fixed;
_background-image: url(about:blank);
}
/* fixed float */
.fix-top {
position: fixed;
_position: absolute; /* Compatible with IE6 */
right: 0;
bottom: 20px;
z-index: 99;
/* Compatible with IE6, the expression of the _top attribute may vary according to the floating position, please change it by yourself*/
_bottom: auto;
_top: expression( document.documentElement.scrollTop + document.documentElement.clientHeight - this.offsetHeight - 20 );
/*The style of the floating window*/
width: 40px;
height: 40px;
background: #f60;
text-align: center;
line-height: 20px;
color: #fff;
text-decoration: none;
}
</style>
</head>
<body>
<div style="height: 1500px">Read who asks the king to chant, the water falls and the fragrance floats</div>
<a class="fix-top" href="#">回到顶部</a>
</body>
</html>
Effect picture: