css滤镜使ie6下png图片透明

方法一：css控制

#head{
width:966px; height:116px; margin:auto; margin-top:15px; background:url(../images/head.png); position:relative;　　/*自行修改图片路径*/
background-repeat:no-repeat;
_background:none;
_filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true,sizingMethod=scale,src=\'#\'" /head.png");　　/*自行修改图片路径*/
}
#head img{
_filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true,sizingMethod=scale,src=\'#\'" /head.png");　　/*自行修改图片路径*/
}

注意：图片路径css支持“../” 滤镜不支持“../”以当前网页文件位置为准

方法二：js控制

<script language="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
  }
}
}
window.attachEvent(" correctPNG);
</script>