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去IE6等浏览器下png图片灰色背景

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这种方法比较简单,快捷,针对不同版本IE下png图片去背景比较有效,(本人用过)直奔主题:

步骤: 1,在您图片有背景的页面上加入下面的js方法      
<script type="text/javascript">
function correctPNG() // correctly handle PNG transparency in Win IE 5.5 & 6. 
	{ 
	var arVersion = navigator.appVersion.split("MSIE") 
	var version = parseFloat(arVersion[1]) 
	if ((version >= 5.5) && (document.body.filters)) 
	{ 
	for(var j=0; j<document.images.length; j++) 
	{ 
	var img = document.images[j] 
	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; height:" + img.height + "px;" + imgStyle + ";" 
	+ "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader" 
	+ "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" 
	img.outerHTML = strNewHTML 
	j = j-1 
	} 
	} 
	} 
	} 
</script>

       2,然后再该页面加载的时候调用此方法       (如:<body onload="correctPNG();"></body>)
       3,现在在运行您的页面背景即去掉了。(背景看不见了但背景所占的位置还会保留)
  
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