IE浏览器PNG图片透明效果代码

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我是靠谱客的博主要减肥金鱼，最近开发中收集的这篇文章主要介绍IE浏览器PNG图片透明效果代码，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

首先看我们的<img>标签代码：
<img src="Example.png" border="0" alt="放大镜" />
我们将利用IE中特有的特效来满足这个要求，这就是AlphaImageLoader Filter (http://msdn.microsoft.com/library/default.asp?url=/workshop/author/filter/reference/filters/alphaimageloader.asp)

如何做？
将下面代码保存为correctPNG.js:

复制代码代码如下:

 
function correctPNG() 
{ 
for(var i=0; i<document.images.length; i++) 
{ 
var img = document.images[i] 
var imgName = img.src.toUpperCase() 
if (imgName.substring(imgName.length-3, imgName.length) == "PNG") 
{ 
var imgID = (img.id) ? "id='" + img.id + "' " : "" 
var imgClass = (img.className) ? "class='" + img.className + "' " : "" 
var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' " 
var imgStyle = "display:inline-block;" + img.style.cssText 
if (img.align == "left") imgStyle = "float:left;" + imgStyle 
if (img.align == "right") imgStyle = "float:right;" + imgStyle 
if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle 
var strNewHTML = "<span " + imgID + imgClass + imgTitle 
+ " style="" + "width:" + img.width + "px; margin:6px; height:" + img.height + "px;" + imgStyle + ";" 
+ "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader" 
+ "(src='" + img.src + "', sizingMethod='scale');"></span>" 
img.outerHTML = strNewHTML 
i = i-1 
} 
} 
} 
window.attachEvent("onload", correctPNG); 

然后在你需要透明的网页中的<head>....</head>区加入：<script type="text/javascript" src="correctPNG.js"></script>

在<body>区加入多个与<img src="Example.png" border="0" alt="放大镜" />类似的PNG图片，试试看？
另一种方法：

复制代码代码如下:

 
<html> 
<head> 
<title>alpha image</title> 
<style type="text/css"> 
.pngholder{ 
width:100px; 
height:100px; 
filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='http://www.uoften.com/attachments/200510/03_124401_ie.png'); 
} 
.pngalpha{ 
filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0); 
background:url(http://www.uoften.com/attachments/200510/03_124401_ie.png) no-repeat; 
width:100px; 
height:100px; 
} 
</style> 
</head> 
<body bgcolor="#3399ff#"> 
<!- And this is your code to implement the image -> 
<div>透明</div> 
<div class="pngholder"><div class="pngalpha"></div></div> 
<div>不透明</div> 
<img src="http://www.uoften.com/attachments/200510/03_124401_ie.png"/> 
</body> 
</html> 