如何让右边的这个块随着网页的下拉而滚动。
<!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>无标题文档</title>
<style type="text/css">
<!--
body { margin:0 auto; padding:0;}
.test { width:800px; height:2000px; background:#999999;}
.test1 { width:100px; height:2000px; background:#0000CC; float:left;}
.test2 { width:650px; height:2000px; background:#CC0000; float:right;}
.test3 { width:150px; height:150px; background:#CC9900; float:right;}
-->
</style>
</head>
<body>
<div class="test">
<div class="test1"></div>
<div class="test2">
<div class="test3"></div>
</div>
</div>
我想让test3这个div随着网页的下拉滚动而随着滚动，求js代码。
</body>
</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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
<!--
body { margin:0 auto; padding:0;}
.test { width:800px; height:2000px; background:#999999;}
.test1 { width:100px; height:2000px; background:#0000CC; float:left;}
.test2 { width:650px; height:2000px; background:#CC0000; float:right;}
.test3 { width:150px; height:150px; background:#CC9900; float:right;}
-->
</style>
</head>
<body>
<div class="test">
<div class="test1"></div>
<div class="test2">
<div class="test3" id="test"></div>
</div>
</div>
我想让test3这个div随着网页的下拉滚动而随着滚动，求js代码。
<script>
function toolbar(el){
el = typeof el == 'string' ? document.getElementById(el) : el;
var elTop = el.offsetTop;
var sTop = 0;
window.onscroll = function(){
sTop = document.body.scrollTop
[解决办法]
document.documentElement.scrollTop;
if( sTop > elTop ){
el.style.marginTop = sTop + 'px';
}else{
el.style.marginTop = elTop + 'px';
}
}
}
toolbar('test');
</script>
</body>
</html>
