我就这么点分了！谁帮我解释一下滤镜呀！那个用来处理图象的！在JAVBASCRIPT！

有好多参数，看看CSS文档<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script>
var ww
var i=0
var flag="1"
function test(){
if(i>99)
i=0
i+=5
document.all.mxh.style.filter="alpha(opacity="+i+")"
ww=setTimeout("test()",10)
}
</script>
</head><body bgcolor="#FFFFFF" text="#000000">把你的鼠标移动到图片上<br>
<img id=mxh src="http://lucky.myrice.com/back.jpg" style="filter:alpha(opacity=50)" onmouseover="test()" onmouseout="clearTimeout(ww)"> 
</body>
</html>