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首先看我們的<img>標(biāo)簽代碼：
<img src="Example.png" border="0" alt="放大鏡" />
我們將利用IE中特有的特效來滿足這個要求，這就是AlphaImageLoader Filter (http://msdn.microsoft.com/library/default.ASP?url=/workshop/author/filter/reference/filters/alphaimageloader.ASP)
如何做？
將下面代碼保存為correctPNG.js:
復(fù)制代碼 代碼如下:
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網(wǎng)頁中的<head>....</head>區(qū)加入：<script type="text/Javascript" src="correctPNG.js"></script>
在<body>區(qū)加入多個與<img src="Example.png" border="0" alt="放大鏡" />類似的PNG圖片，試試看？
另一種方法：
復(fù)制代碼 代碼如下:
<html>
<head>
<title>alpha image</title>
<style type="text/css">
.pngholder{
width:100px;
height:100px;
filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='http://www.jb51.NET/attachments/200510/03_124401_ie.png');
}
.pngalpha{
filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);
background:url(http://www.jb51.NET/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.jb51.NET/attachments/200510/03_124401_ie.png"/>
</body>
</html>
JavaScript技術(shù)：IE瀏覽器PNG圖片透明效果代碼，轉(zhuǎn)載需保留來源！
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