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Correct the transparacy of PNG in IE5 and IE6

/ Published in: JavaScript
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In IE5 and IE6 the transparancy in PNG images won't happen at all, so this would fix it. This might come really useful while we are in the era of switching to better standard-friendly browsers.

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  1. <!-- Convertir todos los PNG en transparentes para IE, versiones anteriores a la 7-->
  2. <!--[if lt IE 7]>
  3. <script language="JavaScript">
  4. function correctPNG() // correctly handle PNG transparency in Win IE 5.5 & 6.
  5. {
  6.   var arVersion = navigator.appVersion.split("MSIE")
  7.   var version = parseFloat(arVersion[1])
  8.   if ((version >= 5.5) && (document.body.filters))
  9.   {
  10.      for(var i=0; i<document.images.length; i++)
  11.      {
  12.         var img = document.images[i]
  13.         var imgName = img.src.toUpperCase()
  14.         if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
  15.         {
  16.            var imgID = (img.id) ? "id='" + img.id + "' " : ""
  17.            var imgClass = (img.className) ? "class='" + img.className + "' " : ""
  18.            var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
  19.            var imgStyle = "display:inline-block;" + img.style.cssText
  20.            if (img.align == "left") imgStyle = "float:left;" + imgStyle
  21.            if (img.align == "right") imgStyle = "float:right;" + imgStyle
  22.            if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle
  23.            var strNewHTML = "<span " + imgID + imgClass + imgTitle
  24.            + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
  25.            + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
  26.            + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>"
  27.            img.outerHTML = strNewHTML
  28.            i = i-1
  29.         }
  30.      }
  31.   }
  32. }
  33. window.attachEvent("onload", correctPNG);
  34. </script>
  35. <![endif]-->

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