js实现的层变换效果

<!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"> 
#div1{ 
    height:200px;width:200px; 
    filter:progid:DXImageTransform.Microsoft.RevealTrans(duration=1,transition=12); 
    background:#CCCCCC; 
} 
</style> 
</head> 
<body> 
<div id="div1"> 
</div> 
</body> 
</html> 
<script language="javascript" type="text/javascript"> 
 
</ script>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

js实现的层变换效果_页面背景