window.moveBy(x,y)参数说明如下。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script type="text/javascript">
function drop()
{
var heig = window.screen.availHeight;
if(self.moveBy)
{
self.moveBy(0,-heig);
for(i = Math.floor(heig/3);i>0;i--)
{
self.moveBy(0,3);
}
}
}
</script>
</head>
<body onload = "drop()">
<img src="new.jpg"/><br/>
<img src="new.jpg"/><br/>
<img src="new.jpg"/><br/>
<img src="new.jpg"/><br/>
</body>
</html>原文：http://blog.csdn.net/yejinwei1220/article/details/46238981