你用的是IE嘛<body onclick="alert(document.body.scrollTop)">
<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a
<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a
<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a
<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a
<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a
<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a
<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a
<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a
<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a
<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a<p>a
"http://www.w3.org/TR/html4/loose.dtd">把这段加上就没有效果了 不信你们试试