<!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.0 Transitional//EN”>
<html>
<head>
<title>New document</title>
<style type=”text/css”>
<!–
div#div1 { height:240px;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=20);}
–>
</style>
</head>
<body>
<div id=”div1″>
<img src=”2.jpg” alt=””/>
</div>
<select onchange=”changeAlpha(this.value)”>
<option>选择透明度</option>
<option value=”20″>20</option>
<option value=”40″>40</option>
<option value=”60″>60</option>
<option value=”80″>80</option>
</select>
</body>
</html>
<script language=”JavaScript” type=”text/javascript”>
<!–
function changeAlpha(value){
var div1=document.getElementById(“div1”);
//设置透明滤镜的透明度属性
div1.filters[0].opacity=value;
}
//–>
</script>