一劳永逸解决IE6下PNG背景图片透明

<script language="javascript" type="text/javascript">

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; height:" + img.height + "px;" + imgStyle + ";"

+ "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"

+ "(src=/'" + img.src + "/', sizingMethod='scale');/"></span>"

img.outerHTML = strNewHTML

i = i-1

}

}

}

function alphaBackgrounds(){

var rslt = navigator.appVersion.match(/MSIE (d+.d+)/, '');

var itsAllGood = (rslt != null && Number(rslt[1]) >= 5.5);

for (i=0; i<document.all.length; i++){

var bg = document.all[i].currentStyle.backgroundImage;

if (bg){

if (bg.match(/.png/i) != null){

var mypng = bg.substring(5,bg.length-2);

//alert(mypng);

document.all[i].style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+mypng+"', sizingMethod='crop')";

document.all[i].style.backgroundImage = "url('')";

//alert(document.all[i].style.filter);

}

}

}

}

if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) {

window.attachEvent("onload", correctPNG);

window.attachEvent("onload", alphaBackgrounds);

}

</script>