js png图片(有含有透明)在IE6中为什么不透明了

复制代码 代码如下:

  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

  }

  }

  }

  }

  window.attachEvent("onload", correctPNG);