内容提示：下面主要收集整理了两种让IE6显示透明PNG图片的方法，供大家在实际应用的灵活参考（本站顶部的主频道条就是综合应用的效果）：

方法一、通过 css ie滤镜解决

<style type="text/css">
<!--
.pngpic { filter: progid:DXImageTransform.Microsoft.
AlphaImageLoader(src='/pngpic.png',sizingMethod='crop'); }
-->
</style>

方法二、通过 javascript 和 css 滤镜解决 ie 整站 png 背景透明问题

<script type="text/javascript" language="javascript">
function enablePngImages() {
 var imgArr = document.getElementsByTagName("IMG");
 for(i=0; i<imgArr.length; i++){
  if(imgArr[i].src.toLowerCase().lastIndexOf(".png") != -1){
   imgArr[i].style.filter = "progid:DXImageTransform.Microsoft.
AlphaImageLoader(src='" + imgArr[i].src + "', sizingMethod='auto')";
   imgArr[i].src = "spacer.gif";
  }
 
  if(imgArr[i].currentStyle.backgroundImage.lastIndexOf(".png") != -1){
   var img = imgArr[i].currentStyle.backgroundImage.substring
(5,imgArr[i].currentStyle.backgroundImage.length-2);
   imgArr[i].style.filter = "progid:DXImageTransform.Microsoft.
AlphaImageLoader(src='"+img+"', sizingMethod='crop')";
   imgArr[i].style.backgroundImage = "url(spacer.gif)";
  }
 }
}

function enableBgPngImages(bgElements){
 for(i=0; i<bgElements.length; i++){
  if(bgElements[i].currentStyle.backgroundImage.lastIndexOf(".png") != -1){
   //alert(bgElements[i]);
   var img = bgElements[i].currentStyle.backgroundImage.substring
(5,bgElements[i].currentStyle.backgroundImage.length-2);
   bgElements[i].style.filter = "progid:DXImageTransform.Microsoft.
AlphaImageLoader(src='"+img+"', sizingMethod='crop')";
   bgElements[i].style.backgroundImage = "url(spacer.gif)";
  }
 }
}
</script>

<img src="pngpic.png" alt="" border="0" />

<!--[if lt IE 7]>
<script type='text/javascript'>
var bgElements;
 enablePngImages();
 if(bgElements){
  enableBgPngImages(bgElements);
 }
</script>
<![endif]-->